I have a cingular sim card and my cousin gave me his older at&t palm phone.?

Question

Whenever i try to put my cingular sim in it it says invalid service provider. I figured since cingular is at&t it would work but it doesnt. Does anyone know how to make it work ?

Thanks

Answer 1

sometimes the smartphones only recongnize the 3G sim cards.  my sim card still says cingular and i just switched it out when i got my new phone.  it could also be that the phone only recognizes the old at&t sim cards (pre merger) since they were different companies.