FORM 6-K

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                        Report of Foreign Private Issuer


                        Pursuant to Rule 13a-16 or 15d-16
                     of the Securities Exchange Act of 1934


                               26 September 2005


                                    O2 plc


                                Wellington Street
                       Slough, Berkshire SL1 1YP, England

                    (Address of principal executive offices)


Indicate by check mark whether the registrant files or will file annual reports
under cover Form 20-F or Form 40-F

                         Form 20-F..X... Form 40-F.....


Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

                               Yes ..... No ..X...


If "Yes" is marked, indicate below the file number assigned to the registrant
in connection with Rule 12g3-2(b): 82 ________


Enclosure:

Copy of announcement regarding 'Product Launch' sent to the
London Stock Exchange on 26 September 2005





                         O2 UNVEILS i-mode(R) IN THE UK

   -Internet at the touch of a button is available in the UK exclusively from
    O2

   -October 1 launch on Pay as You Go and Pay Monthly

   -Available on both 3G and 2G

   -Around 100 international and local mobile Internet sites at launch from
    well known brands such as Egg, Interflora, lastminute.com, Rightmove.co.uk
    and Monster.com

   -Four unique i-mode handsets, with more to follow

   -Introductory offer - free content browsing, free content subscriptions
    until end of 2005, free picture messaging and email until April next year.

   -First easy to use e-mail service "pushed" direct to your mobile

   -Secure Internet technology for banking and shopping

Released: 26 September 2005

O2 today  announced  the UK launch of  i-mode(R),  the world's most  widely-used
mobile Internet service with more than 50 million users in 22 countries.  i-mode
is an easy to use, fast and cost effective way for mobile users to enjoy a world
of content from Internet  sites they already know.  i-mode is available  from O2
stores in the UK from October 1.

Originally  developed  six  years  ago by NTT  DoCoMo,  Japan's  largest  mobile
operator,  O2 will launch i-mode services in Ireland next week. A similar mobile
Internet  service based on NTT DoCoMo's  technology will be launched by O2 under
its own brand in Germany in the first half of 2006.

i-mode combines the simplicity and speed normally associated with fixed Internet
services  with a  consistently  good  customer  experience  on a range of unique
handsets.  It has  something  for  everyone  - users  can  email  using a unique
personal  address  that they choose as well as browse and  transact  with a wide
range of i-mode Internet sites made specifically for use on mobile phones.

In addition, i-mode users can be safe in the knowledge that content and services
come directly from  respected  companies that they know and are based on secure,
open Internet standards.  The simple,  tried and tested integration of email and
mobile Internet means customers can do simple things like click straight through
from an i-mode site to their personal email,  phone a number they find on a site
with just one click or add pictures to their emails.

Differing from O2 Active,  which focuses more on  entertainment  and information
services,  i-mode is a service  built to fit a  customer's  lifestyle.  To date,
close to 100  well-known  brands have  developed  official  i-mode sites for the
October 1 launch.  These will  allow  customers  to do many of the  things  they
typically  use the  Internet  for  today - such as  banking,  shopping,  booking
tickets or holidays.

Sites  available  from  October  include Egg,  Rightmove.co.uk,  Channel 4, BAA,
Financial Times,  Interflora,  Sky Sports and News,  Norwich Union, the National
Lottery,  FHM,  F1-Live.com,  The Times Online, Maxim, Sony BMG, GMTV, India FM,
Streetmap,  Konami, Sega and Sonic the Hedgehog. As on the Internet, browsing on
i-mode  sites  will be  completely  free with  additional  premium  content  and
services available on most sites via monthly subscriptions of up to a maximum of
GBP3 per site.  This is unlike current  mobile  portals where  customers pay for
each download individually.

Matthew Key,  chief  executive of O2 UK,  said:  "i-mode  gives us a very strong
differentiator because it's based on some very simple customer feedback. Namely,
if people are going to use more mobile  Internet  services,  they need to be far
easier,  faster and  populated  with a richer  range of content from brands they
already know and trust. Moreover,  with i-mode, services that are proven to make
people's  lives  easier like banking and  shopping,  but which have to date been
either impossible or too complicated on mobiles, are now simple and secure.

"The i-mode  experience in other countries shows that this new depth and breadth
of content,  combined with the speed and  simplicity of use, leads to far higher
customer usage. For example,  research has shown that seven out of 10 people who
buy  i-mode  handsets  use  the  service,  compared  to just  three  who use the
available WAP services on their handset,  and those users access four times more
content."

i-mode  provides  a simple,  fast  one-button  access  to email  and the  mobile
Internet  portal.  Users  simply  push the i button on the  handset to  navigate
straight  to  O2's  i-mode   browser,   giving   instant   'always-on'   access.
Additionally, because i-mode sites are inherently designed for mobile, customers
will enjoy the fastest  possible  browsing  experience.  For example,  there are
dedicated  buttons that enable users to quickly  navigate back and forth between
i-mode pages without delays.

The service also benefits content providers because it employs the commonly used
open Internet  technology  they are already  accustomed  to. This means they can
develop i-mode sites far faster, easier and more cheaply.  Uniquely, i-mode site
providers  such as  lastminute.com  and Egg can manage their  relationship  with
users,  including  charging them directly for any additional  services they buy.
Also, because many i-mode services are bought on a subscription  basis, there is
a real incentive for content providers to offer a great customer  experience and
build long term loyalty.

As i-mode is intuitive  and easy to use it has been found in other  countries to
drive  higher  usage  than other  existing  mobile  data  services  and  deliver
increased  revenues  for  operators.  With an  industry  leading 25% plus of its
revenue from mobile data  services,  O2 believes  that the launch of i-mode will
give it significant  competitive advantage and help maintain its strong position
in this growing market.

Handsets

O2 will offer  customers  four  handsets  from NEC and Samsung at various  price
points  to  appeal to  different  market  segments.  All four  handsets  include
standard i-mode features such as one-button portal access, integrated e-mail and
browsing,   navigation  buttons  and  advanced  hardware  for  audio  and  games
applications.  As customers  become  familiar  with  i-mode,  this range will be
expanded to include handsets from other leading manufacturers.

Further  details of the  handset  range can be found at  www.o2.com  under press
releases in the media centre.

Availability

O2 UK will sell the i-mode  service and handsets at its 300 retail stores in the
UK, the O2 online shop  (www.o2.co.uk)  and through popular  retailers like P4U,
Carphone Warehouse, The Link, Argos, Woolworths and other channels.

Pricing

O2 is the only operator to offer a simple, single browsing pricing plan with one
price for both Pay Monthly and Pay as You Go  customers.  Pricing is exactly the
same whether users access sites on the official i-mode portal or go 'off portal'
to access other sites. This makes i-mode transparent and simple to understand.

Browsing and  downloading  is priced at GBP3 per  megabyte,  with each  megabyte
equal to  approximately  100 pages,  which is the same rate that O2 charges  for
other consumer data services.  In addition,  customers can save more than 50% on
their  browsing cost by adding simple data bundles known as O2 Bolt On's.  These
Bolt On's have been tailored for the regular and heavy users to make it easy for
customers to plan and control what they spend.

Introductory offer

Elements of the launch package designed to get people started include:

   -Free content subscriptions to official i-mode content sites until the New
    Year when customers buy or upgrade their phone to an i-mode handset to a
    maximum of 10 at any one time.

   -Free mobile browsing for the first 3 months (from 1 Oct to 31 Dec) on
    contract and the first month on pre-pay.

   -Free i-mode email (i-mail - your personal email) and picture messaging
    (MMS) until April 2006, per message pricing thereafter.

Messaging

Emails  without an attachment  will be charged from the outset at the same price
as standard text messages. If an email is sent to more than one recipient (up to
5), they will only be charged for one message.



                                                                    

                 Retail price                    Monthly Bolt On's

Text             10p pre-pay & 12p pay monthly   Standard combination of Bolt
                                                 On's. See www.o2.co.uk for
                                                 details

i-mail and MMS   Free until April 2006. 10p      Same as text
without          pre-pay & 12p pay monthly
attachment       thereafter

i-mail and MMS   Free until April 2006. 25p      Same as MMS
with             thereafter
attachment




From October 10, 2005,  mysterious  yellow 'i-mode' posters will feature in high
profile locations around the UK, heralding the start of one of O2's biggest ever
advertising campaigns since the launch of the company in 2001

                                    - ends -

O2 plc

O2 plc has 100% ownership of mobile network  operators in three  countries - the
UK, Germany and Ireland - as well as a leading mobile Internet portal  business.
All of these businesses are branded as 'O2sub'. The company is a founding member
of Starmap Mobile Alliance, has operations on the Isle of Man (Manx Telecom) and
owns Airwave O2 - an advanced,  digital  emergency  communications  service.  In
addition, O2 has established the Tesco Mobile and Tchibo Mobilfunk joint venture
businesses in the UK and Germany respectively.

O2 has  nearly 25 million  customers  and some  15,000  employees.  It  reported
revenues for the year ended 31 March 2005 of GBP6.683 billion.  Data represented
26% of total service revenues in the quarter ending 30 June 2005.

O2 contacts

Simon Gordon                                Nicola Green
Head of Media Relations                     O2 UK
O2 plc                                      nicola.green@o2.com
simon.gordon@o2.com                         t: +44 (0) 079 769 57810
t: +44 (0)771 007 0698

O2 press office: 01753 628402

Dave Massey
O2 UK
dave.massey@o2.com
t: +44 (0) 773 042 6222

All O2 Group news releases can be accessed at our web site: www.o2.com

'i-mode' and the 'i-mode' logo are trade marks or registered  trade marks of NTT
DoCoMo Inc.  in Japan and other  countries.  O2 Active,  O2 Bolt On's and O2 are
trademarks of the O2 Group of companies.


                              SIGNATURE

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.



                                                 O2 plc


Date: 26 September 2005                 By:___/s/ Robert Harwood___

                                           ROBERT HARWOOD
                                           Assistant Secretary