I bought a Moto L6 from Exotic Cellular. We put in the sim card for Cingular and it appeared to work great. But in certain areas I simply cannot get a signal, as I could with the cheap Nokia I used to have.
I called Exotic Cellular and they explained that their phones are all Asian. If you buy a tri-band, then there is only one Cingular frequency available, and Cingular uses two frequencies.
Their rep said you have to buy a quad-band to make sure you have both frequencies.
All this is apparently explained on their website if you take the time to look around.
No refund, of course, based on their policy.
rl