<PAGE>

                                                                     EXHIBIT 4.3


THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE
HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A
NOMINEE THEREOF. THIS SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A
SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY IN WHOLE OR IN PART MAY BE
REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN SUCH DEPOSITARY OR A NOMINEE
THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO THE COMPANY OR ITS
AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE
ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO
CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.




<PAGE>


                              Cingular Wireless LLC

                           6.50% Senior Notes Due 2011

                                                            CUSIP NO. 17248R AF3
                                                           ISIN NO. US17248RAF38
No. 2                                                             $    -

                  Cingular Wireless LLC, a limited liability company duly
organized and existing under the laws of the State of Delaware (herein called
the "Company", which term includes any successor Person under the Indenture
hereinafter referred to), for value received, hereby promises to pay to Cede &
Co., or registered assigns, the principal sum of ___ ($__) on December 15, 2011,
and to pay interest thereon from December 12, 2001 or from the most recent
Interest Payment Date to which interest has been paid or as duly provided for,
semi-annually on June 15 and December 15 in each year, commencing June 15, 2002,
at the rate of 6.50% per annum, until the principal hereof is paid or made
available for payment.

                  The interest so payable, and punctually paid or duly provided
for, on any Interest Payment Date shall, as provided in such Indenture, be paid
to the Person in whose name this Security (or one or more Predecessor
Securities) is registered at the close of business on the Regular Record Date
for such interest, which shall be the June 1 or December 1 (whether or not a
Business Day), as the case may be, next preceding such Interest Payment Date.
Any such interest not so punctually paid or duly provided for shall forthwith
cease to be payable to the Holder on such Regular Record Date and may either be
paid to the Person in whose name this Security (or one or more Predecessor
Securities) is registered at the close of business on a Special Record Date for
the payment of such Defaulted Interest to be fixed by the Trustee, notice
whereof shall be given to Holders of Securities of this series not less than 10
days prior to such Special Record Date, or be paid at any time in any other
lawful manner not inconsistent with the requirements of any securities exchange
on which the Securities of this series may be listed, and upon such notice as
may be required by such exchange, all as more fully provided in said Indenture.

                  Payment of the principal of (and premium, if any) and interest
on this Security shall be made at the office or agency of the Company maintained
for that purpose in New York, New York, which is currently at 55 Water Street,
1st Floor, New York, New York 10041, in such coin or currency of the United
States of America as at the time of payment is legal tender for payment of
public and private debts; provided, however, that at the option of the Company
payment of interest may be made by check mailed to the address of the Person
entitled thereto as such address shall appear in the Security Register.

                                      -2-

<PAGE>


                  Reference is hereby made to the further provisions of this
Security set forth on the reverse hereof, which further provisions shall for all
purposes have the same effect as if set forth at this place.

                  Unless the certificate of authentication hereon has been
executed by the Trustee referred to on the reverse hereof by manual signature,
this Security shall not be entitled to any benefit under the Indenture or be
valid or obligatory for any purpose.


                                      -3-


<PAGE>


                  IN WITNESS WHEREOF, Cingular Wireless Corporation, the manager
of the Company, has caused this instrument to be duly executed on behalf of the
Company.

Dated:  -, 2002


                                   CINGULAR WIRELESS LLC


                                   By: CINGULAR WIRELESS CORPORATION,
                                           as Manager

                                       By:
                                          -------------------------------------
                                           Name:  Sean Foley
                                           Title: Vice President - Treasurer


Attest:

------------------


                  This is one of the Securities of the series designated therein
referred to in the within-mentioned Indenture.



                                                   Bank One Trust Company, N.A.,
                                                                      As Trustee


                                                   By:
                                                      --------------------------
                                                              Authorized Officer


                                      -4-


<PAGE>


                  This Security is one of a duly authorized issue of securities
of the Company (herein called the "Securities"), issued and to be issued in one
or more series under an Indenture, dated as of December 12, 2001 (herein called
the "Indenture", which term shall have the meaning assigned to it in such
instrument), between the Company and Bank One Trust Company, N.A., as Trustee
(herein called the "Trustee", which term includes any successor trustee under
the Indenture), and reference is hereby made to the Indenture for a statement of
the respective rights, limitations of rights, duties and immunities thereunder
of the Company, the Trustee and the Holders of the Securities and of the terms
upon which the Securities are, and are to be, authenticated and delivered. This
Security is one of the series designated on the face hereof, limited at the date
hereof in aggregate principal amount to $750,000,000; provided that the Company
may from time to time, without notice to or the consent of the Holders of
Securities, create and issue further Securities of this Series (the "Additional
Securities") having the same terms and ranking equally and ratably with the
Securities in all respects, or in all respects except for the payment of
interest accruing prior to the Issue Date or except for the first payment of
interest following the Issue Date of such Additional Securities. Any Additional
Securities will be consolidated and form a single series with the Securities and
shall have the same terms as to status, redemption or otherwise as the
Securities. Any Additional Securities may be issued pursuant to authorization
provided by a resolution of the Board of Directors of Cingular Wireless
Corporation, the manager of the Company, a supplement to the Indenture, or under
an Officers' Certificate pursuant to the Indenture.

                  The Securities of this series are subject to redemption upon
not less than 30 days' but not more than 60 days' notice by mail, at any time,
as a whole or in part, at the election of the Company, at a redemption price
equal to (i) 100% of the principal amount of the Securities to be redeemed,
together with accrued interest to the Redemption Date, if any, but interest
installments whose Stated Maturity is on or prior to such Redemption Date shall
be payable to the Holders of such Securities, or one or more Predecessor
Securities, of record at the close of business on the relevant Record Dates
referred to on the face hereof, all as provided in the Indenture, plus (ii) the
Make-Whole Amount, if any.

                  The Redemption Price will be calculated assuming a 360-day
year consisting of twelve 30-day months.

                  "Make-Whole Amount" means the excess, if any, of the aggregate
present value as of the Redemption Date of each dollar of principal being
redeemed and the amount of interest (exclusive of interest accrued to the
Redemption Date) that would have been payable in respect of such dollar if such
prepayment had not been made, determined by discounting, on a semiannual basis,
such principal and interest at the Treasury Rate, plus 0.25% from the date on
which such principal and interest would have been payable if the Security had
not been redeemed, over the principal amount of the Security being redeemed.


                                      -5-

<PAGE>

                  "Treasury Rate" means (i) the yield to maturity at the time of
computation of U.S. Treasury securities with a constant maturity, as compiled by
and published in the most recent Statistical Release that has become publicly
available at least two Business Days prior to the Redemption Date, equal to the
then remaining maturity of this Security; if no maturity exactly corresponds to
such maturity, yields for the two published maturities most closely
corresponding to such maturity shall be calculated pursuant to the immediately
preceding clause and the Treasury Rate shall be interpolated or extrapolated
from such yields on a straight-line basis, rounding in each of such relevant
periods to the nearest month; or (ii) if the Statistical Release is not
published during the week preceding the calculation date or does not contain
such yields, the rate per annum equal to the semi-annual equivalent yield to
maturity of the Comparable Treasury Issue, calculated using a price for the
Comparable Treasury Issue (expressed as a percentage of its principal amount)
equal to the Comparable Treasury Price for such Redemption Date. The Treasury
Rate shall be calculated on the third Business Day preceding the Redemption
Date.

                  "Comparable Treasury Issue" means the U.S. Treasury security
selected by an Independent Investment Banker as having a maturity comparable to
the remaining term ("Remaining Life") of this Security that would be utilized,
at the time of selection and in accordance with customary financial practice, in
pricing new issues of corporate debt securities of comparable maturity to the
remaining term of this Security.

                  "Comparable Treasury Price" means (i) the average of three out
of five Reference Treasury Dealer Quotations for such Redemption Date, after
excluding the highest and lowest Reference Treasury Dealer Quotations, or (ii)
if the Independent Investment Banker obtains fewer than five such Reference
Treasury Dealer Quotations, the average of all such quotations.

                  "Independent Investment Banker" means (i) any of Lehman
Brothers Inc., Goldman, Sachs & Co. or J.P. Morgan Securities Inc. and their
respective successors, as selected by the Company, or (ii) if all those firms
are unwilling or unable to select the Comparable Treasury Issue, an independent
investment banking institution of national standing appointed by the Company.

                  "Reference Treasury Dealer" means (i) Lehman Brothers Inc.,
Goldman, Sachs & Co. and J.P. Morgan Securities Inc. and their respective
successors, provided, that if any of the foregoing shall cease to be a primary
U.S. Government securities dealer in New York City (a "Primary Treasury
Dealer"), the Company will substitute another Primary Treasury Dealer and (ii)
any other Primary Treasury Dealer selected by any Independent Investment Banker
after consultation with the Company.

                  "Reference Treasury Dealer Quotations" means, with respect to
each Reference Treasury Dealer and any Redemption Date, the average, as
determined by the Independent Investment Banker, of the bid and asked prices for
the Comparable Treasury Issue (expressed in each case as a percentage of its
principal amount) quoted in writing to


                                      -6-

<PAGE>



the Independent Investment Banker at 5:00 p.m., New York City time, on the third
Business Day preceding such Redemption Date.

                  "Statistical Release" means the statistical release designated
"H.15(519)" or any successor publication which is published weekly by the
Federal Reserve System and which establishes yields on actively traded U.S.
government securities adjusted to constant maturities.

                  In the event of redemption of this Security in part only, a
new Security or Securities of this series and of like tenor for the unredeemed
portion hereof shall be issued in the name of the Holder hereof upon the
cancellation hereof.

                  The Indenture contains provisions for defeasance at any time
of the entire indebtedness of this Security or certain restrictive covenants and
Events of Default with respect to this Security, in each case upon compliance
with certain conditions set forth in the Indenture.

                  If an Event of Default with respect to Securities of this
series shall occur and be continuing, the principal of the Securities of this
series may be declared due and payable in the manner and with the effect
provided in the Indenture.

                  The Indenture permits, with certain exceptions as therein
provided, the amendment thereof and the modification of the rights and
obligations of the Company and the rights of the Holders of the Securities of
each series to be affected under the Indenture at any time by the Company and
the Trustee with the consent of the Holders of a majority in principal amount of
the Securities at the time Outstanding of each series to be affected. The
Indenture also contains provisions permitting the Holders of specified
percentages in principal amount of the Securities of each series at the time
Outstanding, on behalf of the Holders of all Securities of such series, to waive
compliance by the Company with certain provisions of the Indenture and certain
past defaults under the Indenture and their consequences. Any such consent or
waiver by the Holder of this Security shall be conclusive and binding upon such
Holder and upon all future Holders of this Security and of any Security issued
upon the registration of transfer hereof or in exchange herefor or in lieu
hereof, whether or not notation of such consent or waiver is made upon this
Security.

                  As provided in and subject to the provisions of the Indenture,
the Holder of this Security shall not have the right to institute any proceeding
with respect to the Indenture or for the appointment of a receiver or trustee or
for any other remedy thereunder, unless such Holder shall have previously given
the Trustee written notice of a continuing Event of Default with respect to the
Securities of this series, the Holders of not less than 25% in principal amount
of the Securities of this series at the time Outstanding shall have made written
request to the Trustee to institute proceedings in respect of such Event of
Default as Trustee and offered the Trustee reasonable indemnity, and the Trustee
shall not have received from the Holders of a majority in principal amount of
Securities of this series at the time Outstanding a direction inconsistent with


                                      -7-

<PAGE>


such request, and the Trustee shall have failed to institute any such
proceeding, for 60 days after receipt of such notice, request and offer of
indemnity. The foregoing shall not apply to any suit instituted by the Holder of
this Security for the enforcement of any payment of principal hereof or any
premium or interest hereon on or after the respective due dates expressed
herein.

                  No reference herein to the Indenture and no provision of this
Security or of the Indenture shall alter or impair the obligation of the
Company, which is absolute and unconditional, to pay the principal of and any
premium and interest on this Security at the times, place and rate, and in the
coin or currency, herein prescribed.

                  As provided in the Indenture and subject to certain
limitations therein set forth, the transfer of this Security is registrable in
the Security Register, upon surrender of this Security for registration of
transfer at the office or agency of the Company in any place where the principal
of and any premium and interest on this Security are payable, duly endorsed by,
or accompanied by a written instrument of transfer in form satisfactory to the
Company and the Security Registrar duly executed by, the Holder hereof or his
attorney duly authorized in writing, and thereupon one or more new Securities of
this series and of like tenor, of authorized denominations and for the same
aggregate principal amount, shall be issued to the designated transferee or
transferees.

                  The Securities of this series are issuable only in registered
form without coupons in denominations of $1,000 and any integral multiple
thereof. As provided in the Indenture and subject to certain limitations therein
set forth, Securities of this series are exchangeable for a like aggregate
principal amount of Securities of this series and of like tenor of a different
authorized denomination, as requested by the Holder surrendering the same.

                  No service charge shall be made to a Holder for any such
registration of transfer or exchange, but the Company may require payment of a
sum sufficient to cover any tax or other governmental charge payable in
connection therewith.

                  Prior to due presentment of this Security for registration of
transfer, the Company, the Trustee and any agent of the Company or the Trustee
may treat the Person in whose name this Security is registered as the owner
hereof for all purposes, whether or not this Security be overdue, and none of
the Company, the Trustee nor any such agent shall be affected by notice to the
contrary.

                  All terms used in this Security which are defined in the
Indenture shall have the meanings assigned to them in the Indenture.

                  This Security shall be governed by and construed in accordance
with the laws of the State of New York, without regard to principles of
conflicts of laws.


                                      -8-