PROSPECTUS SUPPLEMENT NO. 1                                    Filed pursuant to
(To Prospectus dated May 13, 1998)                                Rule 424(b)(3)
                                                      Registration No. 333-50169

$86,250,000

Cellular Communications International, Inc.
6% Convertible Subordinated Notes Due 2005

     This  Prospectus  Supplement  No. 1 supplements  and amends the  Prospectus
dated  May  13,  1998  (the  "Prospectus"),   relating  to  the  6%  Convertible
Subordinated Notes Due 2005 (the "Convertible Notes") of Cellular Communications
International,  Inc.  (the  "Company")  and the shares of the  Company's  common
stock,  par value $.01 per share ("Common  Stock"),  issuable upon conversion of
the Convertible Notes.

     The table on page 70 of the Prospectus sets forth  information with respect
to the Selling Holders (as defined in the Prospectus) and the respective amounts
of  Convertible  Notes  beneficially  owned by each  Selling  Holder that may be
offered  pursuant  to  the  Prospectus  (as  supplemented  and  amended).   This
Prospectus  Supplement  amends that table by (i) replacing item 26 of that table
with the corresponding  item set forth below and (ii) adding items 27 through 39
set forth below to that table.


                                                                     NUMBER OF UNITS       TOTAL NUMBER OF
                                                                     BEING REGISTERED     UNITS BENEFICIALLY
     NAME OF BENEFICIAL HOLDER                                            HEREBY                 OWNED
     -------------------------                                       ----------------     ------------------
                                                                                       
"26. SmallCap World Fund, Inc. ...................................   $  7,300,000           $  7,300,000
 27. MFS Series Trust VI - MFS Utilities Fund.....................   $  5,880,000           $  5,880,000
 28. Highbridge Capital Corporation...............................   $  3,500,000           $  3,500,000
 29. President and Fellows of Harvard College.....................   $  3,000,000           $  3,000,000
 30. Forest Global Convertible Fund Series A-5....................   $  2,825,000           $  2,825,000
 31. Forest Alternative Strategies Fund II LP Series A-5..........   $  2,825,000           $  2,825,000
 32. MFS/Sunlife Series Trust - Utilities Series..................   $  2,240,000           $  2,240,000
 33. MFS Variable Insurance Trust - MFS Utilities Series..........   $    560,000           $    560,000
 34. LDG Limited..................................................   $    200,000           $    200,000
 35. Forest Alternative Strategies Fund II LP Series A-5I.........   $    200,000           $    200,000
 36. MFS Series Trust I - MFS Equity Income Fund..................   $    128,000           $    128,000
 37. MFS Institutional Advisors, Inc..............................   $     90,000           $     90,000
 38. Forest Alternative Strategies Fund II LP Series A-5M.........   $     50,000           $     50,000
 39. Unidentified Selling Holders.................................   $ 22,042,000           $ 22,042,000
                Total.............................................   $ 86,250,000           $ 86,250,000"


     The Prospectus, together with this Prospectus Supplement No. 1, constitutes
the prospectus required to be delivered by Section 5(b) of the Securities Act of
1933, as amended,  with respect to offers and sales of the Convertible Notes and
the Common Stock issuable upon conversion of the Convertible Notes.

     Prospective investors should carefully consider matters discussed under the
caption "Risk Factors" beginning on page 9 of the Prospectus.

THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE  COMMISSION OR ANY STATE  SECURITIES  COMMISSION NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

         The date of this Prospectus Supplement No. 1 is May 28, 1998.