SkyTel Communications to Redeem 13-1/2% Senior Notes Due December 15, 2002 and 6.75% Convertible Subordinated Debentures Due May 15, 2002

CLINTON, Miss., November 8, 1999 -- MCI WORLDCOM, Inc. (Nasdaq:
WCOM) today announced that its wholly owned subsidiary SkyTel
Communications, Inc. will redeem all of its outstanding 13-1/2 percent
Senior Notes due December 15, 2002 (CUSIP No.607406 AC 9) (the
"SkyTel Notes") and all of its outstanding 6.75 percent
Convertible Subordinated Debentures Due May 15, 2002 (CUSIP No. 607406
AA 3) (the "SkyTel Debentures"). MCI WorldCom has set
December 15, 1999 as the redemption date for the SkyTel Notes and the
SkyTel Debentures.
The aggregate outstanding principal amount of the SkyTel Notes is
approximately $265 million. Holders of the SkyTel Notes who surrender
their notes for payment as described in the notice of redemption will
receive an amount equal to the sum of (x) 100% of the principal amount
thereof and (y) the Applicable Premium (as defined in the Indenture)
with respect to each $1,000 principal amount of notes so redeemed (the
"Redemption Price"), plus accrued and unpaid interest on the
SkyTel Notes to the redemption date. The Applicable Premium will be
determined based on a specified Treasury yield on the date two business
days before the redemption date, as described in the notice of
redemption.

Since the actual Treasury yield cannot be determined until shortly
before the December 15 redemption date, the actual Redemption Price is
not known at this time. However, based on published Treasury yields on
November 1, 1999, and a redemption date of December 15, 1999, the
Redemption Price would be 112.994% of the principal amount at stated
maturity thereof, plus the December 15, 1999 interest payment (for a
total assumed payment, including the December 15, 1999 interest
payment, of $1,197.44 per $1,000 principal amount as of the date of
original issuance of the SkyTel Notes). Since the actual Redemption
Price will not be determined until two business days before December
15, 1999, changes in the Treasury yield may cause the actual Redemption
Price as of December 15, 1999 to differ significantly from the
Redemption Price that is calculated based on the Treasury yield as of
November 1, 1999.

On and after December 15, 1999, interest on the SkyTel Notes will
cease to accrue and holders will have no other rights as holders other
than the right to receive payment of the foregoing redemption price
plus accrued and unpaid interest to the redemption date, unless there
is a default in such payment.

The aggregate outstanding principal amount of the SkyTel Debentures
is approximately $919,000. Holders of the SkyTel Debentures who
surrender their debentures for payment as described in the notice of
redemption will receive an amount equal to 102.025% of the principal
amount thereof plus accrued and unpaid interest to December 15, 1999 of
$5.63 per $1,000 principal amount of such debentures. On and after
December 15, 1999, interest on the SkyTel Debentures will cease to
accrue and holders will have no other rights as holders other than the
right to receive payment of the foregoing redemption price plus accrued
and unpaid interest to the redemption date, unless there is a default
in such payment.

Prior to 5:00 p.m., New York City time on December 14, 1999 - the
first business day immediately preceding the redemption date -- the
SkyTel Debentures are convertible, in whole or in part, at the option
of the holder thereof, unless previously redeemed, into shares of
common stock of MCI WorldCom at a price of $38.9712 per share of MCI
WorldCom common stock. The number of shares of MCI WorldCom common
stock issuable upon conversion of a SkyTel Debenture is determined by
dividing the principal amount converted by the conversion price, but
such conversion rights with respect to the debentures will cease as of
5:00 p.m. (New York City time) on December 14, 1999.

The respective notices of redemption are being sent to holders of
the SkyTel Notes and the SkyTel Debentures on November 8, 1999. Copies
of the notice of redemption with respect to the SkyTel Notes can be
obtained from Chase Bank of Texas, National Association, the trustee
and paying agent with respect to such Notes, by calling
800-275-2048.

MCI WorldCom is a global leader in communications services with 1998
revenues of more than $30 billion and established operations in more
than 65 countries encompassing the Americas, Europe and the
Asia-Pacific regions. MCI WorldCom is a premier provider of
facilities-based and fully integrated local, long distance,
international, Internet and wireless messaging services. MCI
WorldCom's global networks, including its state-of-the-art
pan-European network and transoceanic cable systems, provide end-to-end
high-capacity connectivity to more than 45,000 buildings worldwide. On
October 5, 1999, MCI WorldCom and Sprint announced a definitive merger
agreement. Following regulatory and shareholder approvals, the Company
expects the merger to be closed in the second half of 2000. MCI
WorldCom is traded on The Nasdaq National Market under WCOM. For more
information on MCI WorldCom, visit the World Wide Web at
http://www.wcom.com.