I have a Cingular Motorola V551 that I no longer need because I have
upgraded to a different phone. I took the SIM card out of the old phone and
put it in the new phone and the new phone works fine.
I bought the old phone in June 2005 which was when I signed on with
Cingular. The initial one-year contract expired this year. The old phone
is still in working order and I would like to try to sell it, but one
question I always hear asked is whether the phone is unlocked. What does
that mean, and how would I know if the old phone is locked or unlocked? If
it is locked, how do I unlock it?