Announcement of the prospectus supplement in respect of TeliaSonera's mandatory redemption offer to holders of shares, A

Announcement of the prospectus supplement in respect of TeliaSonera's
mandatory redemption offer to holders of shares, ADSs and warrants in
Sonera - the offer commences on December 30, 2002

TeliaSonera (SSE: TLSN, HEX: TLS1V, NASDAQ: TLSN) today announces that
the prospectus supplement with respect to TeliaSonera's mandatory
redemption offer for the outstanding shares, including shares
represented by American Depository Shares ("ADSs"), and warrants in
Sonera (HEX: SRA), has been approved by the Finnish Financial
Supervision Authority. An amendment to TeliaSonera's registration
statement on Form F-4 containing the mandatory redemption offer
prospectus supplement has also been filed with the US Securities and
Exchange Commission (SEC) and an application to have the prospectus
supplement recognized by the Stockholm Exchange has been made.
The prospectus supplement will be distributed to all current directly
registered holders of Sonera shares, ADSs and warrants by mail, together
with instructions on the procedures to be followed in order to accept
the offer. The prospectus supplement is also, as from December 20, 2002
available on TeliaSonera's and Sonera's respective websites,
www.telia.com/investorrelations and www.sonera.com (investors).
The mandatory redemption offer period commences on December 30, 2002 and
expires on January 31, 2003. The preliminary results of the mandatory
redemption offer are expected to be announced on or about February 6,
2003.

Under the terms of the mandatory redemption offer:

· For each Sonera share you tender, you may elect to receive 1.51440
TeliaSonera shares or, alternatively, ?5.00 in cash.

· For each Sonera ADS you tender, you may elect to receive 0.30288
TeliaSonera ADSs or, alternatively, the U.S. dollar equivalent of ?5.00
in cash (less applicable fees and expenses). Each Sonera ADS represents
one Sonera share and each TeliaSonera ADS represents five TeliaSonera
shares.

· For each Sonera warrant of a certain series issued pursuant to
Sonera's 1999 and 2000 stock option programs you tender, you may elect
to receive one TeliaSonera warrant of a corresponding series or,
alternatively, between ?0.02 and ?1.66 in cash depending on the series
of warrants you tender. Each TeliaSonera warrant entitles the holder to
subscribe for 1.5 TeliaSonera shares.

The amount of TeliaSonera shares, TeliaSonera ADSs and TeliaSonera
warrants offered in the mandatory redemption offer in exchange for each
Sonera share, Sonera ADS and Sonera warrant, respectively, is the same
as that offered in the recently completed exchange offer. The cash price
of ?5.00 per share being offered to holders of Sonera shares, including
Sonera shares represented by Sonera ADSs, is based on the volume-
weighted average trading price of Sonera shares on the Helsinki
Exchanges during the 12-month ending on November 15, 2002.

If you elect to receive cash consideration in the mandatory redemption
offer for your tendered Sonera securities:

· TeliaSonera will pay for all Sonera securities that have been validly
tendered in the mandatory redemption offer for cash as promptly as
practicable after the receipt of acceptance relating to such securities.

· The payment of the cash consideration will be made:

· in the case of a tendering Sonera shareholder or Sonera warrantholder,
into the bank account related to the book-entry account of such
tendering Sonera securityholder on or about five business days after the
execution of the sale of the tendered Sonera securities to TeliaSonera
on or outside the Helsinki Exchanges. Such sale will be executed within
five business days after the receipt of acceptance relating to such
Sonera securities; and

· in the case of a tendering Sonera ADS holder, (a) by book-entry
transfer of the applicable amount in U.S. dollars into the DTC account
of the DTC participant which tendered the Sonera ADSs on behalf of such
holder in the mandatory redemption offer by means of the DTC bookentry
confirmation system or (b) by means of a check in U.S. dollars to the
order of the tendering Sonera ADS holder as provided in the
corresponding letter of transmittal, in either case as promptly as
practicable the execution of the sale of the Sonera shares underlying
the Sonera ADSs to TeliaSonera on or outside the Helsinki Exchanges.

If you elect to receive TeliaSonera securities in the mandatory
redemption offer in exchange for your tendered Sonera securities:

· TeliaSonera will accept for exchange and will exchange all Sonera
securities that have been validly tendered and not withdrawn pursuant to
the terms of the mandatory redemption offer at the earliest practicable
time following the expiration date of the mandatory redemption offer.

· Such TeliaSonera securities will be delivered to you or, in the case
of tendered Sonera ADSs, to an account for the benefit of the depositary
for TeliaSonera ADSs, at the earliest practicable date after the
expiration of the mandatory redemption offer period which, in the case
of Sonera shares or Sonera warrants, shall be on or about 11 business
days following the expiration date of the mandatory redemption offer.

Assuming that there is no extension of the mandatory redemption offer
period the TeliaSonera shares and TeliaSonera warrants are expected to
be entered into the relevant book-entry accounts on or about February
17, 2003.

Sonera shareholders should also be aware that TeliaSonera has started a
separate compulsory acquisition proceeding under Finnish law under which
the remaining holders of Sonera shares will be required to surrender
their remaining Sonera shares to TeliaSonera for redemption at a "fair
price." To the extent shareholders do not participate in the mandatory
redemption as described in the prospectus supplement, their Sonera
shares will be redeemed in connection with the compulsory acquisition
proceeding. TeliaSonera has offered to redeem the remaining Sonera
shares in the compulsory acquisition proceeding for ?5.00 per share. As
described in the prospectus supplement, however, the ultimate redemption
price in the compulsory acquisition proceeding is subject to arbitration
proceedings and legal appeals pursuant to applicable Finnish law.
TeliaSonera will provide Sonera shareholders with additional information
regarding the compulsory acquisition proceedings as required under
Finnish and other applicable law.

For further information journalists can contact:
TeliaSonera's Press Office, +46 8 713 58 30

Cautionary Disclaimer/Legend: On December 9, 2002, Telia announced the
completion of its exchange offer for all of the outstanding shares,
including shares in the form of American depositary shares, or ADSs, and
certain warrants of Sonera. Effective December 9, 2002, Telia changed
its name to TeliaSonera. As a result of the completion of the exchange
offer, TeliaSonera is, pursuant to Finnish law, making a mandatory
redemption offer to acquire all of the outstanding shares , including
shares in the form of ADSs, and warrants of Sonera were not tendered in
the exchange offer. The contents of this document are neither an offer
to purchase nor a solicitation of an offer to sell shares of
TeliaSonera. Any offer in the United States will only be made through a
prospectus, as amended or supplemented, which is part of a registration
statement on Form F-4 which Telia originally filed with the U.S.
Securities and Exchange Commission (the "SEC") on October 1, 2002.
Sonera shareholders who are U.S. persons or are located in the United
States are urged to carefully review the registration statement on Form
F-4, as it may be amended from time to time, the prospectus, including
any amendments or supplements thereto, included therein and other
documents relating to the offer that TeliaSonera has filed or will file
with the SEC because these documents contain important information
relating to the offer. You may obtain a free copy of these documents at
the SEC's web site at www.sec.gov. You may also inspect and copy the
registration statement on Form F-4, and any amendment thererto, as well
as any documents incorporated by reference therein at the public
reference room maintained by the SEC at 450 Fifth Street, NW,
Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for
further information about the public reference room. These documents may
also be obtained free of charge by contacting TeliaSonera AB, Investor
Relations, SE-123 86 Farsta, Sweden. Attention: External Communications
or Investor Relations (tel: +46 8 7137143, or Sonera Corporation,
Teollisuuskatu 15, P.O. Box 106, FIN-00051 SONERA, Finland. Attention:
Investor Relations (tel: +358 20401). YOU SHOULD READ THE PROSPECTUS,
AND ANY AMENDMENTS OR SUPPLEMENTS THERETO CAREFULLY BEFORE MAKING A
DECISION CONCERNING THE OFFER.

TeliaSonera is the telecommunications leader in the Nordic region. The
Group's home market is the Nordic and Baltic regions. TeliaSonera´s
overall focus is on best serving its customers in its core business and
creating value for its shareholders through stronger profits and cash
flows. TeliaSonera is listed on Stockholmsbörsen, Helsinki Exchange and
NASDAQ. Pro forma sales as per December 31, 2001 totalled 80.9 billion
SEK and the number of employees as per June 30, 2002 was 30 045.

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