I changed from Sprint to Cingular.

I have many reasons to still prefer Cingular. Here are 14. YMMV

A) I got my Cingular plan before the current price increases.

B) I have Rollover (currently over 2000 minutes banked),
   so I don't need to pay for 7 PM nights to try and decrease usage.

C) I have Quality phones (a v600 and a T637) that don't overheat in use
    and pre-maturally die long before contract is up like plastic
     CDMA Sanyo phones do. After 9 months my Cingular phones
     look and act like new. Sanyo phones were failing after 3 months,
     but would pass sprintPCS "tests"
C2) My Cingular phones have ample memory for ring tones and pictures.
C3) Comes time to upgrade my phone, I just move my SIM card,
    no activation grief, no problems with transferring phone book.
C4) Having phones which are sold in the millions worldwide makes it
    much easier to get accessories, and not be subjected to
     outrageous accessory prices charged by Carriers.

D) With 850 MHz GSM I have better indoor reception than 1900 MHz CDMA.

E) With GSM I have better coverage in SE Texas.

F) With GSM I have better voice quality than CDMA.

G) I don't have L O N G hold times for Customer service, and I don't
   get hung up on or lied to by reps with Handle Time
   maximums to worry about.

H) With Cingular I have relatives that are also on Cingular for
   free Mobile to Mobile, and free Mobile to Mobile is not an
   extra cost or sometime add-on.

I) I kept my Mobile number when I ported to Cingular, and Cingular
credited me for the 3 days it took SprintPCS to release the numbers.

J) Should I go out of the country, I can still use my phone.

K) Dropped calls are flat not an issue anymore.