Will an at&t SIM card work in an old cingular phone?

E

Emily

New member
I just got a new phone on at&t and I'll be going to the beach soon.. I don't want to ruin the phone so I was going to try and put my SIM card in an old phone.. but the only other phone I have is made for Cingular. The old phone is the Sony Ericsson z300a. If I put my SIM card in this phone will it still work the same? Please help me out. :)
 
HI no until you unlock your sony ericsson Z300A mobile from cingular network you can't use it with AT&T sim ....You can easily unlock your phone using sites like Theunlockspot.com here they are rendering unlock code for all mobile models at reliable cost .....After unlocking your phone you can freely use it with any GSM sim ...
 
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