1

                       Letterhead of Qwest Communications


FOR IMMEDIATE RELEASE

                Contacts:  Media Contact:                Investor Contact:
                             Tyler Gronbach              Lee Wolfe
                             (303) 992-2155              800-567-7296
                             Tyler.Gronbach@qwest.com    IR@qwest.com

                 QWEST REVISES OFFERS FOR U S WEST AND FRONTIER

        -- Frontier Shareholders to Receive $20 in Cash and $48 in Qwest
                        Stock for Each Frontier Share --

                -- U S WEST Shareholders to Receive $69 in Qwest

                        Stock for Each U S WEST Share --

                 -- Revised Offers Provide U S WEST and Frontier
               Shareholders with Greater Certainty as to Value --

DENVER, June 23, 1999 - Qwest Communications International Inc. (Nasdaq:
QWST) today announced that it has increased its offers to acquire U S WEST,
Inc. (NYSE: USW) and Frontier Corporation (NYSE: FRO).  Qwest is offering to
acquire each U S WEST share for $69.00 in Qwest stock, and to acquire each
Frontier share for $20.00 in cash and $48.00 in Qwest stock.

"We have revised our offers in order to be fully responsive to the issues raised
by the Boards of Directors of U S WEST and Frontier," said Qwest Chairman and
CEO Joseph P. Nacchio. "We encourage the Boards of the two companies to take all
actions necessary to enter into discussions with Qwest regarding these superior
offers, which are clearly in the best interests of their respective
shareholders, customers and employees.

"In revising these offers, we also have protected the interests of Qwest's
existing shareholders," continued Mr. Nacchio. "Because we are prepared to use
cash to guarantee the value of these proposals, we are not required to issue a
number of shares greater than that contemplated under our original offers. In




                                                                               2


fact, if Qwest's share price increases above $38.70, we would actually issue
fewer shares in completing the U S WEST offer, and if Qwest's share price
increases above $39.15, we would issue fewer shares in completing the Frontier
offer." The revised offers were communicated in separate letters sent today by
Mr. Nacchio to U S WEST Chairman, President and CEO Solomon D. Trujillo and to
Frontier CEO Joseph P. Clayton. Neither proposal is conditioned upon acceptance
of the other proposal. The full texts of the two letters are attached to this
press release.

The Revised Offer for Frontier
Under its revised proposal, Qwest will deliver cash and Qwest common stock
having a value of $68.00 for each share of Frontier common stock consisting of
$20.00 in cash and the balance in Qwest common stock. At the closing price on
Tuesday, June 22, 1999 the exchange ratio represented by Qwest's offer is 1.359.

Qwest's revised offer is subject to a collar on the price of Qwest stock between
$30.50 and $43.50. Qwest will protect the Frontier shareholders' value by paying
more cash or issuing additional shares (at Qwest's option) to offset any decline
in Qwest stock price down to $30.50 per share. Frontier shareholders will
realize all of the upside of any increases in the Qwest stock price above this
collar.

Qwest's revised offer represents a $5.00 per share (8%) premium to the value of
Frontier's proposed merger with Global Crossing based on the closing price of
Global Crossing's shares on June 22, and a 17.2% premium to the closing price of
Frontier on June 22.

The Revised Offer for U S WEST
Under its revised proposal, Qwest will deliver Qwest common stock having a value
of $69.00 for each share of U S WEST common stock. Based on the closing price
for Qwest common stock on June 22, the exchange ratio represented by Qwest's
offer is 1.954.

Qwest's offer is subject to a collar on the price of Qwest stock between $30.50
and $43.50. Qwest will protect the U S WEST shareholders' value by paying more
cash or issuing additional shares (at Qwest's option) to offset any decline in
Qwest stock price down to $30.50 per share. U S WEST shareholders will realize
all of the upside of any increases in the Qwest stock price above this collar.
Qwest is confident that, if it were to fund with borrowings the cash




                                                                               3


payments required to offset any decline in Qwest's stock price, the combined
company would enjoy an investment grade rating on its debt.

Qwest's revised offer represents a $7.86 per share (12.9%) premium to the value
of U S WEST's proposed merger with Global Crossing based on the closing price of
Global Crossing's shares on June 22, and a $12.00 per share (21.1%) premium to
the closing price of U S WEST on June 22.

The stock portions of Qwest's offers continue to be tax-free to shareholders of
Frontier and U S WEST and Qwest is confident that it is capable of consummating
this transaction at least as expeditiously as Global Crossing.

"Our increased offers for U S WEST and Frontier are obviously superior to the
existing proposals from Global Crossing," said Mr. Nacchio. "As we have
emphasized since our announcement last week, the Qwest stock is stronger and
more liquid than the Global Crossing stock, Qwest offers greater realizable
synergies and upside potential than Global Crossing does, and Qwest offers the
benefits of a true, integrated merger without the use of a complex, divisive
tracking stock."

About Qwest

Qwest Communications International Inc. (Nasdaq: QWST) is a leader in reliable
and secure broadband Internet-based data, voice and image communications for
businesses and consumers. Headquartered in Denver, Qwest has more than 8,500
employees working in North America, Europe and Mexico. The Qwest Macro
Capacity(R) Fiber Network, designed with the newest optical networking, spans
more than 18,500 route miles in the United States, with an additional 315-mile
network route to be completed by the end of the year. In addition, Qwest and
KPN, the Dutch telecommunications company, have formed a venture to build and
operate a high-capacity European fiber optic, Internet Protocol-based network
that has 2,100 miles and will span 9,100 miles when it is completed in 2001.
Qwest also has nearly completed a 1,400-mile network in Mexico. For more
information, please visit the Qwest web site at www.qwest.com.

# # #

This release and the attachments may contain forward-looking statements that
involve risks and uncertainties. These statements may differ materially from
actual future events or results. Readers are referred to the documents filed by
Qwest with the SEC, specifically the most recent reports which identify
important risk factors that could cause actual results to differ from those
contained in the forward-looking statements, including potential fluctuations in
quarterly results, dependence on new product development, rapid technological
and market change, failure to complete the network on schedule and




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on budget, financial risk management and future growth subject to risks, Qwest's
ability to achieve Year 2000 compliance, and adverse changes in the regulatory
or legislative environment. This release and the attachments include analysts'
estimates and other information prepared by third parties for which Qwest
assumes no responsibility. In addition, certain statements regarding synergies
and other projections and information contained in this release and the
attachments are based on publicly available information regarding U S WEST and
Frontier. Qwest undertakes no obligation to review or confirm analysts'
expectations or estimates or such publicly available information or to release
publicly any revisions to any forward-looking statements to reflect events or
circumstances after the date hereof or to reflect the occurrence of
unanticipated events.

The Qwest logo is a registered trademark of Qwest Communications International
Inc. in the U.S. and certain other countries.

Copies of the letters to Mr. Clayton and Mr. Trujillo follow:




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              [Qwest Communications International Inc. letterhead]

June 23, 1999

Mr. Joseph P. Clayton
Chief Executive Officer
Frontier Corporation
180 South Clinton Avenue
Rochester, New York 14646

Dear Joe:

    The Board of Directors of Qwest Communications International Inc. is pleased
to present a revised proposal that responds to the concerns expressed about the
previous Qwest offer. Under our revised proposal, Qwest will deliver cash and
Qwest common stock having a value of $68 for each share of Frontier common stock
consisting of $20 in cash and the balance in Qwest common stock. At yesterday's
closing price, the exchange ratio represented by our offer is 1.359.

    Our revised offer is subject to a "collar" on the price of Qwest stock
between $30.50 and $43.50. Qwest will protect the Frontier shareholders' value
by paying more cash or issuing additional shares (at Qwest's option) to offset
any decline in Qwest stock price down to $30.50 per share. Frontier shareholders
will realize all of the upside of any increases in the Qwest stock price above
this collar. The stock portion of our offer continues to be tax-free to Frontier
shareholders and we are confident that we are capable of consummating this
transaction at least as expeditiously as Global Crossing. Our revised offer
represents an 8% premium to the value of Frontier's proposed merger with Global
Crossing based on the closing price of Global Crossing's shares yesterday, and a
17.2% premium to yesterday's closing price of Frontier.

        There should be no doubt that our proposal is financially superior to
your pending transaction with Global Crossing and represents a clearly superior
strategic proposal. Your shareholders will receive a higher price for their
Frontier shares. They will also receive a superior stock reflecting Qwest's
premier assets both in the United States and internationally, management's
operating record, strong growth prospects and the greater realizable synergies
resulting from our combination.

        Our revised offer addresses your concern regarding price certainty by
implementing the price collar described above. We would expect to discuss with
you the




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terms of our potential agreement with U S WEST to address your expressed concern
regarding the effects of the U S WEST transaction on our proposal.

        Among the reasons why our proposal is strategically superior to Global
Crossing's are the following:

        o   Our stock is stronger, more stable and more liquid than Global
            Crossing's stock, and does not bear the risks of potential declines
            interest in Global Crossing's stock. We have a substantial public
            float of over $14.0 billion that is significantly greater than the
            public float of Global Crossing. The volatility of Qwest's stock is
            less than the volatility of Global Crossing's stock over all
            relevant time periods which we have evaluated. Due to its thin
            public float, Global Crossing's stock price may experience
            substantial declines if Global Crossing insiders sell their shares
            after the closing of the Frontier/Global Crossing transaction (when
            their lockups terminate) or if even a small number of Frontier or U
            S WEST shareholders elect to sell the Global Crossing shares they
            would receive in the mergers with Global Crossing.

        o   We offer greater synergies and are specific in identifying and
            providing sources for these synergies, in contrast to the vague and
            unexplained synergies promised by Global Crossing. As we have
            described before, we believe that our combination will result in
            significant operating synergies, aggregating approximately $4.0
            billion to $4.45 billion through the year 2005 from the combination
            of Frontier and Qwest. Global Crossing, on the other hand, has not
            even attempted to substantiate the synergies they claim will result
            from a Global Crossing-Frontier combination-- even after we have
            noted their failure to do so. It is also worth noting that we have
            met or exceeded our estimates of synergies in all of our previous
            acquisitions. Global Crossing does not have our track record in this
            respect.

        o   Our structure is simple and both easy to understand and value. The
            tracking stock proposed by Global Crossing that will be forced upon
            your shareholders in the Global Crossing/U S WEST/Frontier proposal
            will separate management teams, divide assets and operations and
            create long-term conflicts between the strategies, objectives and
            management of the two entities reflected in a tracking stock
            structure. Only short term financial engineering is behind the
            tracking stock structure proposed by Global Crossing.

       As before, although neither our Frontier acquisition proposal nor our U S
WEST acquisition proposal is conditioned upon the success of the other, we
continue to be firmly committed to acquiring both Frontier and U S WEST, while



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at the same time prepared to enter into a binding agreement with Frontier
whether or not we conclude our transaction with U S WEST.

        We expect, upon consummation of the transaction, to invite you to assume
a senior operational role in the combined company and we will ask many members
of your management team to joint the ranks of the senior management of the
combined company. We also expect to invite you and one other current Frontier
director to join the Qwest Board.

        Given the clear superiority of our offer to the Global Crossing offer,
we believe that it is in the best interests of your shareholders, customers and
employees for you to meet with us as soon as possible to finalize a definitive
agreement between our companies. The revised offer is, of course, subject to
entering into such an agreement. We continue to be prepared to enter into a
merger agreement substantially similar to the Global Crossing agreement. Qwest
is committed to bringing the combination between our companies to a successful
conclusion and we would be delighted to discuss with you any aspect of our
proposal.

        Additional copies of this letter are being delivered to you so that you
may deliver the same to each member of your board.

        We and our advisors will be happy to meet with Frontier at the time of
your choosing to answer any questions about our proposal.

                                                     Sincerely,

                                                     Joseph P. Nacchio


Cc:   Ms. Patricia C. Barron
      Mr. Raul E. Cesan
      Ms. Brenda E. Edgerton
      Mr. Jairo A. Estrada
      Mr. Michael E. Faherty
      Mr. Alan C. Hasselwander
      Mr. Eric Hippeau
      Mr. Robert Holland, Jr.
      Mr. Douglas H. McCorkindale
      Mr. James F. McDonald
      Dr. Leo J. Thomas




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              [Qwest Communications International Inc. letterhead]




June 23, 1999

Mr. Solomon Trujillo
Chairman, President & Chief
Executive Officer
U S WEST, Inc.
1801 California Street
Denver, Colorado 80202

Dear Sol:

       The Board of Directors of Qwest Communications International Inc. is
pleased to present a revised proposal that responds to the concerns expressed
about the previous Qwest offer. Under our revised proposal, Qwest will deliver
Qwest common stock having a value of $69 for each share of U S WEST common
stock. Based on yesterday's closing price for Qwest common stock, the exchange
ratio represented by our offer is 1.954. We are confident that we are capable of
consummating this transaction at least as expeditiously as Global Crossing.

    Our offer is subject to a "collar" on the price of Qwest stock between
$30.50 and $43.50. Qwest will protect the U S WEST shareholders' value by paying
more cash or issuing additional shares (at Qwest's option) to offset any decline
in Qwest stock price down to $30.50 per share. U S WEST shareholders will
realize all of the upside of any increases in the Qwest stock price above this
collar. The stock portion of our offer continues to be tax-free to U S WEST
shareholders and we are confident that, if we were to fund with borrowings the
cash payments required to offset any decline in Qwest's stock price, the
combined company would enjoy an investment grade rating on its debt.

    Our revised offer represents a 12.9% premium to the value of U S WEST's
proposed merger with Global Crossing based on the closing price of Global
Crossing's shares yesterday, and a 21.1% premium to yesterday's closing price of
U S WEST.

    We believe that our revised offer fully addresses all of your concerns about
our offer, as indicated below. First, there should be no doubt that our proposal
is financially superior to your pending transaction with Global Crossing and
represents a more attractive proposal to deliver the full value inherent in the
data-centric network strategy that we and you share for the future of the



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communications industry. Your shareholders will receive a higher price for their
U S WEST shares than in the Global Crossing offer.

    Second, we have increased the certainty of the value that your shareholders
will receive and addressed your concerns about the perceived volatility of Qwest
stock. (We note that our studies indicate that in all relevant periods which we
have evaluated, the volatility of Global Crossing stock, whose offer has no
comparable collar, exceeds the volatility of our stock.) U S WEST shareholders
will receive greater value in a simpler transaction structure and they will
receive a superior stock reflecting Qwest's premier assets, management's
operating record, strong growth prospects and the greater realizable synergies
resulting from our combination.

    Third, Qwest offers a business combination that is more likely to realize
the stated U S WEST vision of creating a "data- and wireless-centric company
that provides integrated services inside [its] current region and globally." We
have actual operating experience in implementing that strategy. We have a
thriving Internet-based business and operations, a fully constructed network and
a proven management team. We have also entered into a number of strategic
relationships which will bring long-term value to the shareholders of the
combined company, including relationships with Microsoft, Cisco, HewlettPackard,
SAP, KPMG and KPNQwest. We would be very interested in discussing with you how
best to combine our experience with yours in achieving the strategic vision we
both share.

    Among the reasons why our proposal is strategically superior to Global
Crossing's are the following:

        o   A combination of Qwest and U S WEST would permit us to achieve the
            strategic vision our companies share more quickly than either of us
            could alone and would create a company that would grow more quickly
            than a combined Global Crossing-U S WEST. In addition, the
            combination of our companies would enable U S WEST to improve its
            customer service more effectively and efficiently than any
            improvements that would result from a combination with Global
            Crossing. Furthermore, the strong prospects of a Qwest-U S WEST
            combination would create better opportunities for the employees of
            our companies who would share in our growth.

        o   Our stock is more liquid than Global Crossing's stock, and does not
            bear the risks of potential declines. We have a substantial public
            float of over $14 billion that is significantly greater than the
            public float of Global




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            Crossing. The volatility of Qwest's stock is less than the
            historical volatility of Global Crossing's stock over all relevant
            time periods which we have evaluated. Due to its thin public float,
            Global Crossing's stock price may experience substantial declines if
            Global Crossing insiders sell their shares after the closing of the
            Frontier/Global Crossing transaction (when their lockups terminate)
            or if even a small number of Frontier or U S WEST shareholders elect
            to sell the Global Crossing shares they would receive in the mergers
            with Global Crossing.

        o   We offer greater synergies and are specific in identifying and
            providing sources for these synergies, in contrast to the vague and
            unexplained synergies promised by Global Crossing. As we have
            described before, we believe that our combination will result in
            significant operating synergies, aggregating approximately $9.3
            billion to $9.75 billion through the year 2005 from the combination
            of U S WEST and Qwest. Global Crossing, on the other hand, has not
            even attempted to publicly substantiate the synergies they claim
            will result from a Global Crossing- U S WEST combination-- even
            after we have noted their failure to do so. It is also worth noting
            that we have met or exceeded our estimates of synergies in all of
            our previous acquisitions. Global Crossing does not have our track
            record in this respect.

        o   Our strategy for the merger of U S WEST, Frontier and Qwest has
            industrial logic and long term value-creation behind it. Our offer,
            with its single class of stock, best serves the shared strategic
            vision of Qwest and U S WEST to offer our customers a bundle of
            services (including local, long-distance, Internet and data
            products) through an owned network with end-to-end connectivity in a
            world-wide marketplace. The tracking stock proposed by Global
            Crossing does not further this vision. In fact, Global Crossing's
            tracking stock will separate management teams, divide assets and
            operations and create long-term conflicts between the strategies,
            objectives and management of the two entities reflected in a
            tracking stock structure. Only short term financial engineering is
            behind the tracking stock structure proposed by Global Crossing.


    As before, although neither our U S WEST acquisition proposal nor our
Frontier acquisition proposal is conditioned upon the success of the other, we
continue to be firmly committed to acquiring both U S WEST and Frontier, while
at the same time prepared to enter into a binding agreement with U S WEST
whether or not we conclude our transaction with Frontier.

    We expect, upon consummation of the transaction, to invite you to assume a
senior operational role as well as to become one of the few key people



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responsible for the creation and implementation of the strategic vision of the
combined company. Further, we will ask many members of your management team to
join the ranks of the senior management of the combined company. We also expect
to invite you to become Vice Chairman of Qwest and we would expect to invite up
to four members of the current U S WEST Board, including you, to join the Qwest
Board.

    Given the clear superiority of our offer to the proposed Global Crossing
offer, we believe that it is in the best interests of your shareholders,
customers and employees for you to meet with us as soon as possible to finalize
a definitive agreement between our companies. The revised offer is, of course,
subject to entering into such an agreement. We continue to be prepared to enter
into a merger agreement substantially similar to the Global Crossing agreement.
Qwest is committed to bringing the combination between our companies to a
successful conclusion and we would be delighted to discuss with you any aspect
of our proposal.

    Additional copies of this letter are being delivered to you so that you may
provide the same to each member of your board.

    We and our advisors will be happy to meet with U S WEST at the time of your
choosing to answer any questions about our proposal.

                                                     Sincerely,


                                                     Joseph P. Nacchio

Cc:   Ms. Linda G. Alvarado
      Dr. Craig R. Barrett
      Sen. Hank Brown
      Mr. Jerry J. Colangelo
      Mr. George J. Harad
      Mr. Peter S. Hellman
      Mr. Allen F. Jacobson
      Mr. Richard D. McCormick
      Ms. Marilyn C. Nelson
      Mr. Frank P. Popoff
      Mr. Jerry O. Williams