<SUBMISSION>
<ACCESSION-NUMBER>0001070235-05-000057
<TYPE>6-K
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20050404
<FILING-DATE>20050404
<DATE-OF-FILING-DATE-CHANGE>20050404
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>RESEARCH IN MOTION LTD
<CIK>0001070235
<ASSIGNED-SIC>3661
<IRS-NUMBER>000000000
<FISCAL-YEAR-END>0228
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>6-K
<ACT>34
<FILE-NUMBER>000-29898
<FILM-NUMBER>05728002
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>295 PHILLIP ST
<STREET2>WATERLOO
<CITY>ONTARIO CANADA
<STATE>A6
<ZIP>00000
<PHONE>5198887465
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>295 PHILLIP STREET
<STREET2>WATERLOO, ONTARIO N2L 3W8
<CITY>ONTARIO
<STATE>A6
<ZIP>N2L 3W8
</MAIL-ADDRESS>
</FILER>
<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>pr040405.htm
<TEXT>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<HTML>
<HEAD>
     <!-- Created by EDGAR Ease Plus (EDGAR Ease+ 1.4a) -->
     <!-- Project:                                   -->
     <!-- Control Number: pr0040405                                                         -->
     <!-- Rev Number:     001                                                              -->
     <!-- Client Name:    Research In Motion Limited                                       -->
     <!-- Project Name:   Press Release                                                -->
     <!-- Firm Name:      Investor Relations                                               -->
     <TITLE>PR0040405</TITLE>
</HEAD>
<BODY>









<!-- MARKER FORMAT-SHEET="Width Begin" FSL="Project" -->
<TABLE WIDTH=600 CELLSPACING=0 CELLPADDING=0 BORDER=0>
<TR VALIGN=TOP>
<TD><div align="center"><font face="Times New Roman, Times, Serif" size=2><u><b>FORM
  6-K</b></u></font><BR><A NAME=A003></A></div><P ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>SECURITIES
AND EXCHANGE COMMISSION </FONT></P>

<P ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Washington, D.C. 20549 </FONT></P>

<!-- MARKER FORMAT-SHEET="Head Minor Center" FSL="Default" -->
<A NAME=A005></A>
<P ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Report of Foreign
Private Issuer </FONT></P>

<P ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Pursuant to Rule 13a-16
or 15d-16 of </FONT></P>

<P ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>the Securities Exchange Act
of 1934 </FONT></P>
<!-- MARKER FORMAT-SHEET="Width End" FSL="Project" -->
</TD>
</TR>
</TABLE>
<BR>
<p>&nbsp;</p>
<table width="600" border="0">
  <tr>
    <td width="230">For the month of</td>
    <td width="236"><b>April</b>
      <hr>
    </td>
    <td width="112"><b>2005</b>
      <hr>
    </td>
  </tr>
  <tr>
    <td width="230"><font face="Times New Roman, Times, Serif" size=2>Commission
      File Number</font></td>
    <td width="236"><b><font face="Times New Roman, Times, Serif" size=2>000-29898
      </font></b>
      <hr>
      <b><font face="Times New Roman, Times, Serif" size=2> </font></b></td>
    <td width="112">
      &nbsp;<hr>
    </td>
  </tr>
  <tr>
    <td colspan="3">
      <div align="center"> <font face="Times New Roman, Times, Serif" size=3><b>Research
        In Motion Limited</b> </font>
        <hr>
        (Translation of registrant&#146;s name into English)</div>
    </td>
  </tr>
  <tr>
    <td colspan="3">
      <div align="center">295 Phillip Street, <br>
        Waterloo, Ontario, Canada <br>
        N2L 3W8 </div>
    </td>
  </tr>
  <tr>
    <td colspan="3">
      <div align="center"><font face="Times New Roman, Times, Serif" size=2>(Address
        of principal executive offices) </font></div>
    </td>
  </tr>
</table>

<P>&nbsp;</P>

<!-- MARKER FORMAT-SHEET="Para Indent 0" FSL="Project" -->
<TABLE WIDTH=600 CELLSPACING=0 CELLPADDING=0 BORDER=0>
<TR VALIGN=TOP>
<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Indicate
by check mark whether the registrant files or will file annual reports under cover Form
20-F or Form 40F.  </FONT></TD></TR>
</TABLE>
<div align="center"><BR>
  <table width="427" border="0">
    <tr>
      <td width="200"><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Form 20-F
        ___________</font></td>
      <td width="217"><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Form 40-F_____<u>X</u>_______</font></td>
    </tr>
  </table>
  <!-- MARKER FORMAT-SHEET="Para Indent 0" FSL="Project" -->
</div>
<br>
<TABLE WIDTH=600 CELLSPACING=0 CELLPADDING=0 BORDER=0>
<TR VALIGN=TOP>
<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Indicate
by check mark         if the registrant is submitting the Form&nbsp;6-K in paper as
permitted         by Regulation&nbsp;S-T Rule&nbsp;101(b)(1):________________  </FONT></TD></TR>
</TABLE>
<BR>

<!-- MARKER FORMAT-SHEET="Para Indent 0" FSL="Project" -->
<TABLE WIDTH=600 CELLSPACING=0 CELLPADDING=0 BORDER=0>
<TR VALIGN=TOP>
<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Indicate
by check mark if   the registrant is submitting the Form&nbsp;6-K in paper as permitted
by Regulation&nbsp;S-T   Rule&nbsp;101(b)(7):________________  </FONT></TD></TR>
</TABLE>
<BR>

<!-- MARKER FORMAT-SHEET="Para Indent 0" FSL="Project" -->
<TABLE WIDTH=600 CELLSPACING=0 CELLPADDING=0 BORDER=0>
<TR VALIGN=TOP>
<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Indicate
by check mark whether by furnishing the information contained in this Form, the
registrant is also thereby furnishing the information to the Commission pursuant to Rule
12g3-2(b) under the Securities Exchange Act of 1934.  </FONT></TD></TR>
</TABLE>
<div align="center"><BR>
  <table width="441" border="0">
    <tr>
      <td> <FONT FACE="Times New Roman, Times, Serif" SIZE=2>Yes__________________</font></td>
      <td><FONT FACE="Times New Roman, Times, Serif" SIZE=2>No________<u>X</u>__________</font></td>
    </tr>
  </table>
  <br>
  <!-- MARKER FORMAT-SHEET="Para Indent 0" FSL="Project" -->
</div>
<TABLE WIDTH=600 CELLSPACING=0 CELLPADDING=0 BORDER=0>
<TR VALIGN=TOP>
<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;If
"Yes" is marked, indicate below the file number assigned to the registrant   in
connection with Rule 12g3-2(b) : 82-_______________  </FONT></TD></TR>
</TABLE>
<BR>

<!-- MARKER FORMAT-SHEET="Head Major Center Bold" FSL="Default" -->
<!-- MARKER FORMAT-SHEET="Width Begin" FSL="Project" -->
<TABLE WIDTH=600 CELLSPACING=0 CELLPADDING=0 BORDER=0>
<TR VALIGN=TOP>
<TD>
<H1 ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=4>DOCUMENT INDEX </FONT></H1>
<!-- MARKER FORMAT-SHEET="Width End" FSL="Project" -->
</TD>
</TR>
</TABLE>
<BR>
<!-- MARKER FORMAT-SHEET="Head Sub 1 Left" FSL="Default" -->
<A NAME=A011></A>
<P ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=2><I>&nbsp;&nbsp;&nbsp;
  .</I> </FONT></P>

<!-- MARKER FORMAT-SHEET="Para (List) Hang Level 2" FSL="Default" -->
               <TABLE WIDTH=600 CELLPADDING=0 CELLSPACING=0>
                    <TR VALIGN=TOP>

    <TD ALIGN=RIGHT WIDTH=8%>
      <div align="center">
        <p><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Document</FONT></p>
        <p><FONT FACE="Times New Roman, Times, Serif" SIZE=2>1. </FONT></p><BR>
 </div>
    </TD>

    <TD ALIGN=LEFT WIDTH=81%>
      <p>&nbsp;</p>
      <p><FONT FACE="Times New Roman, Times, Serif" SIZE=2>News Release dated April 4, 2005
 (&#147;RIM To Preview Next Generation BlackBerry Mobile Data System At Wireless Enterprise Symposium &quot;)</FONT></p>


    </TD>

    <TD WIDTH=11%>
      <P ALIGN=center><FONT FACE="Times New Roman, Times, Serif" SIZE=2> Page
        No</FONT></P>
      <P ALIGN=center><FONT FACE="Times New Roman, Times, Serif" SIZE=2>4 </FONT></P><BR>


    </TD>
                    </TR>
                    </TABLE>
                    <BR>


<!-- MARKER PAGE="sheet: 2; page: 2" -->
<HR SIZE=5 COLOR=GRAY NOSHADE>
<P ALIGN=RIGHT><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Document 1 </FONT></P>
<HR SIZE=5 COLOR=GRAY NOSHADE>



<!-- MARKER FORMAT-SHEET="Head Right" FSL="Default" -->

<P ALIGN=RIGHT><FONT FACE="Times New Roman, Times, Serif" SIZE=3><b>April 4, 2005</b> </FONT></P>


<H1 ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=4>FOR IMMEDIATE RELEASE </FONT></H1>

<H1 ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=4>RIM to Preview Next
Generation BlackBerry Mobile Data System at Wireless Enterprise Symposium </FONT></H1>


<P ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=4>New Web Services Solution
Designed To Simplify and Accelerate Wireless Application Development </FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3><B>Waterloo, ON &#150; April 4,
2005</B> <B>&#150;</B> Research In Motion (RIM) (Nasdaq: RIMM; TSX: RIM) today announced
plans to introduce a new wireless application development framework for BlackBerry&reg;
customers and developers. BlackBerry Mobile Data System&#153; (MDS) v4.1 is the next
generation of RIM&#146;s MDS technology that will leverage and build upon the existing
features of BlackBerry Enterprise Server&#153; and provide a powerful, easy-to-use and
integrated system for mobilizing enterprise data and optimizing wireless applications.
BlackBerry MDS v4.1 will utilize standards-based integration methods to mobilize
enterprise applications and back-end systems, including XML Web Services. </FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3>BlackBerry MDS v4.1 is expected to be
commercially available later this year. A preview of BlackBerry MDS v4.1 will be provided
at the Wireless Enterprise Symposium 2005 in Orlando, Florida on April 19-21. RIM is also
offering a training day and lab for BlackBerry MDS v4.1 at the symposium (visit
<U>www.attendwes.com</U> to register). </FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3>&#147;Progressive enterprises are
finding true value by wirelessly extending their collaborative systems, thus boosting
productivity and increasing their bottom line&#148;, said Jack Gold, Vice President at
META Group. &#147;We expect 75% of enterprises to have deployed wireless within two to
three years, often starting with email, but soon progressing to back office application
extensions as well. Systems built upon industry standards like BlackBerry will allow
deployment in the shortest time and with the least cost.&#148; </FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3>BlackBerry MDS v4.1 will make it
easier for developers to create and deploy business applications for mobile employees,
providing a comprehensive framework for building wireless applications and reducing the
amount of time and resources spent on in-house development. BlackBerry MDS v4.1 will also
feature centralized deployment and management of applications to help minimize the total
cost of ownership of wireless applications. Through the use of Web Services, BlackBerry
MDS v4.1 will allow BlackBerry customers to mobilize applications in a variety of
environments, including Microsoft .NET and J2EE . </FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3>BlackBerry MDS v4.1 will provide full
support for automatic integration with enterprise applications in a service-oriented
architecture, based on standard Web Services. BlackBerry MDS v4.1 consists of three major
components: </FONT></P>


<P ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=3>-more- </FONT></P>

<ol>
<li>       BlackBerry MDS Studio(TM)- a powerful visual  application  design and assembly tool that allows  developers to quickly  assemble
         wireless applications using drag and drop functionality.
<li>       BlackBerry MDS Runtime(TM)- device  software that provides  runtime  services for  applications  developed  with  BlackBerry MDS
         Studio.
<li>       BlackBerry MDS Services(TM)- a set of services that reside on BlackBerry  Enterprise  Server to handle  requests from BlackBerry
         MDS applications and manage interactions with enterprise applications and systems.

</ol>
<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3>&#147;BlackBerry MDS is already
widely deployed and proven successful with corporate developers and ISV partners that
embraced the security, robustness and manageability of the BlackBerry wireless
architecture to expand beyond email with a broad range of enterprise applications. The
introduction of BlackBerry Mobile Data System v4.1 will take us to a whole new level as we
provide an integrated system with added services and tools that dramatically simplify
wireless application development by leveraging Web Services, industry standards and the
proven BlackBerry platform,&#148; said Mike Lazaridis, President and Co-CEO at Research In
Motion. &#147;BlackBerry MDS v4.1 will enable customers to strengthen the ROI of
BlackBerry and employ a new and powerful application development option that is fully
backward compatible with existing BlackBerry MDS applications.&#148; </FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3>Leading software infrastructure and
application providers have already begun to embrace BlackBerry MDS v4.1. </FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3>&#147;Sun Microsystems and RIM have been
working together to build solutions for mobile Web Services. BlackBerry MDS v4.1 is an
important next step in bringing a joint solution to our customers,&#148; said David
Bryant, Senior Director Application Platform Marketing. &#147;At Wireless Enterprise
Symposium 2005, Sun will be demonstrating BlackBerry MDS v4.1 with the Sun Java Enterprise
System, previewing the rapid creation of rich mobile Web Services applications. BlackBerry
MDS v4.1 has been tested and verified to work with Web Services running on Sun&#146;s Java
Enterprise System Application Server and created with Sun Java Studio.&#148; </FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3>&#147;Our customers need to use their
Salesforce.com application anywhere, anytime, so integration with Web Services is
essential to their success. BlackBerry Mobile Data System v4.1 will provide additional
choice and new capabilities for partners and customers wishing to access Salesforce
functionality and data via BlackBerry while on the road,&#148; said Pat Sueltz, President,
Global Operations for salesforce.com. </FONT></P>


<H1 ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=3>Key Features of
BlackBerry MDS v4.1: </FONT></H1>

<ul>
<li>        Allows  fast and simple  assembly  of  wireless  applications  using a visual  design  tool that  minimizes  requirements  for
                  specialized skills and widens the pool of wireless application developers.
<li>        Supports Web Services for greater  interoperability  between mobile  applications and existing  enterprise systems and reduced
                  applications development and lifecycle costs.
<li>        Designed  specifically  for wireless  applications  to reduce  wireless  transmission  costs and optimize  performance  within
                  wireless bandwidth and power constraints.

                                                                -more-
<li>        Built on industry  standard  technologies  and the proven  BlackBerry  platform to offer  backward  compatibility  and ongoing
                  investment protection.
<li>        Enables centralized deployment and management of applications to reduce administrative overhead and total cost of ownership.

</ul>
<H1 ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=3>
Technical Overview of BlackBerry MDS v4.1 components:</font></h1>
<H1 ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=3>
BlackBerry MDS Studio</font></h1>
<p><FONT FACE="Times New Roman, Times, Serif" SIZE=3>
A powerful visual  application  design and assembly tool that allows  developers to quickly create  applications  using a drag and drop
methodology:</font></p>

<ul>
<li>        Automatically  interrogates  existing enterprise  applications and back-end systems to determine what services are exposed for
                  developers to include in their applications.
<li>        Automatically  creates  prototype  applications  that  developers  can  easily  build  on by  editing  and  revising  what  is
                  automatically generated.
<li>        Provides a rich set of predefined  user  interface,  message and data  components  that developers can drag and drop to use or
                  customize.

</Ul>
<!-- MARKER FORMAT-SHEET="Head Major Left Bold" FSL="Default" -->

<H1 ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=3>BlackBerry MDS Runtime </FONT></H1>

<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3>BlackBerry device software that
provides runtime services for applications developed with the BlackBerry MDS Studio and
manages the application lifecycle on BlackBerry devices, including deployment, execution
and upgrade:</FONT></P>

<ul>
<li>        Allows users to query BlackBerry MDS Services to discover what applications are available to a particular user.
<li>       Allows users to request and provision applications.


</ul>
<!-- MARKER FORMAT-SHEET="Head Major Left Bold" FSL="Default" -->

<H1 ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=3>BlackBerry MDS Services </FONT></H1>

<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3>The component of BlackBerry MDS
v4.1 that resides on BlackBerry Enterprise Server to handle requests from BlackBerry
devices and manage interactions with enterprise applications and systems. BlackBerry MDS
Services include: </FONT></P>

<ul>
<li>        Connection  Service - provides  TCP/IP and HTTP-based  connectivity  between  mobile  applications  on BlackBerry  devices and
                  enterprise applications and backend systems residing behind the firewall.
<li>        Application  Integration  Service - supports Web Services and other standard  mechanisms for integrating  mobile  applications
                  with existing  enterprise  applications  and systems;  Handles the  transmission of application data messages between
                  BlackBerry MDS Applications and back-end systems.
<li>        Provisioning  Service - controls which  applications  users can download to BlackBerry devices and manages OTA installation of
                  applications on devices.
<li>        Data Optimization  Service - transforms  existing server side content and data for efficient wireless  transmission and use on
                  mobile devices.
<li>        Administrative  and  Management  Service - deals with  policies,  such as those  specifying  allowed  applications  for users,
                  services available to applications, etc.; centralizes the overall application lifecycle management.

</ul>
<!-- MARKER FORMAT-SHEET="Head Major Left Bold" FSL="Default" -->

<H1 ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=3>New Name Reflects
Integrated System </FONT></H1>

<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3>In 2002, RIM introduced its MDS
technology as a feature of BlackBerry Enterprise Server under the name &#147;Mobile Data
Service.&#148; With BlackBerry MDS v4.1 and the significant expansion of MDS services and
tools to be provided, RIM is modifying the formal name of this offering to &#147;Mobile
Data System&#148; to better reflect the comprehensive and integrated nature of this
application development system. </FONT></P>


<P ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=3>-more- </FONT></P>

<!-- MARKER FORMAT-SHEET="Head Major Left Bold" FSL="Default" -->

<H1 ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=3>About Research In Motion
(RIM) </FONT></H1>

<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3>Research In Motion is a leading
designer, manufacturer and marketer of innovative wireless solutions for the worldwide
mobile communications market. Through the development of integrated hardware, software and
services that support multiple wireless network standards, RIM provides platforms and
solutions for seamless access to time-sensitive information including email, phone, SMS
messaging, Internet and intranet-based applications. RIM technology also enables a broad
array of third party developers and manufacturers to enhance their products and services
with wireless connectivity to data. RIM&#146;s portfolio of award-winning products,
services and embedded technologies are used by thousands of organizations around the world
and include the BlackBerry&reg; wireless platform, the RIM Wireless Handheld&#153; product
line, software development tools, radio-modems and software/hardware licensing agreements.
Founded in 1984 and based in Waterloo, Ontario, RIM operates offices in North America,
Europe and Asia Pacific. RIM is listed on the Nasdaq Stock Market (Nasdaq: RIMM) and the
Toronto Stock Exchange (TSX: RIM). For more information, visit www.rim.com or
www.blackberry.com. </FONT></P>

                  <P ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=3>  -###-</font></p>


<b>Media Contact</b><br>
Courtney Flaherty<br>
Brodeur Worldwide for RIM<br>
+1 (212) 771-3637<br>
cflaherty@brodeur.com<br><br>

<b>RIM Investor Contact</b><br>
RIM Investor Relations<br>
+1 (519) 888-7465<br>
investor_relations@rim.com<Br><br>


<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3>Forward-looking statements in this
news release are made pursuant to the &#147;safe harbor&#148; provisions of the United
States Private Securities Litigation Reform Act of 1995. When used herein, words such as
&#147;intend&#148; and similar expressions are intended to identify forward-looking
statements. Forward-looking statements are based on assumptions made by and information
available to Research In Motion Limited. Investors are cautioned that such forward-looking
statements involve risks and uncertainties. Important factors that could cause actual
results to differ materially from those expressed or implied by such forward looking
statements include, without limitation, possible product defects and product liability,
risks related to international sales and potential foreign currency exchange fluctuations,
the initiation or outcome of litigation, acts or potential acts of terrorism,
international conflicts, significant fluctuations of quarterly operating results, changes
in Canadian and foreign laws and regulations, continued acceptance of RIM&#146;s products,
increased levels of competition, technological changes and the successful development of
new products, dependence on third-party networks to provide services, dependence on
intellectual property rights and other risks and factors detailed from time to time in
RIM&#146;s periodic reports filed with the United States Securities and Exchange
Commission, and other regulatory authorities. The Company has no intention or obligation
to update or revise any forward-looking statements, whether as a result of new
information, future events or otherwise. </FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" FSL="Default" -->
<P><FONT FACE="Times New Roman, Times, Serif" SIZE=3>RIM assumes no liability and makes no
representation, warranty or guarantee whatsoever in relation to third party products
mentioned herein. The BlackBerry and RIM families of related marks, images and symbols are
the exclusive properties and trademarks of Research In Motion Limited. RIM, Research In
Motion and BlackBerry are registered with the U.S. Patent and Trademark Office and may be
pending or registered in other countries. All other brands, product names, company names,
trademarks and service marks are the properties of their respective owners. </FONT></P>





















<!-- MARKER PAGE="sheet: 2; page: 2" -->

<TABLE WIDTH=600 CELLSPACING=0 CELLPADDING=0 BORDER=0>
<TR VALIGN=TOP>
<TD><H1 ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=4>SIGNATURES
</FONT></H1>
<!-- MARKER FORMAT-SHEET="Width End" FSL="Project" -->
</TD>
</TR>
</TABLE>
<BR>
<!-- MARKER FORMAT-SHEET="Width Begin" FSL="Project" -->
<TABLE WIDTH=600 CELLSPACING=0 CELLPADDING=0 BORDER=0>
<TR VALIGN=TOP>
<TD><P><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant
  to the requirements of the Securities Exchange Act of 1934, the registrant has   duly
caused this report to be signed on its behalf by the undersigned, thereunto   duly
authorized. </FONT></P><P>&nbsp;
<!-- MARKER FORMAT-SHEET="Width End" FSL="Project" -->
</TD>
</TR>
</TABLE>
<BR>

<p></P><table width="600" border="0"><tr><td width="33">&nbsp;</td><td width="209">&nbsp;</td><td colspan="2"><div align="center"><b><font face="Times New Roman, Times, Serif" size=3>Research
        In Motion Limited </font></b></div><hr><div align="center">(Registrant) </div></td></tr><tr><td width="33">Date:</td><td width="209"><div align="center"><u>April 4, 2005</u></div></td><td width="59">By:</td><td width="271">/s/ Rob Duncan <hr><div align="center">(Signature)
</div></td></tr><tr><td width="33">&nbsp;</td><td width="209">&nbsp;</td><td width="59">&nbsp;</td><td width="271">Rob Duncan</td></tr><tr><td width="33">&nbsp;</td><td width="209">&nbsp;</td><td width="59">&nbsp;</td><td width="271">Vice President, Corporate Controller</td></tr></table>


<H1 ALIGN=CENTER>&nbsp;</H1>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
