Can I use an AT&T SIM card in an Alltel phone since they use SIM cards?

2 weeks agoBest Answer - Chosen by Voterssea_beanIt depends on what company you have. I have Verizon and they don't even have SIM cards in their phones. If you have Cingular or AT&T I know that they use SIM cards so I would think that it would be a problem if the phone that you are trying to activate doesn't have one.

Ask the carrier you are currently using or are looking to use, and see if you need a SIM card or not. A SIM card is a micro-chip that has your cell phone number and contacts on it, so that you can easily transfer from phone to phone. Like, if you have a phone with a SIM card and just got a new phone, all you have to do is put the old SIM card in your new phone and it is ready to use!

Not all phones require them though. I wish you the best of luck! * 2 weeks agoOther AnswersAarononly GSM cell phone companies use sim cards, so it depends on where the phone came from.

Verizon, Alltel, Sprint, Ntelos, US Cellular, MetroPCS phones do not use sim cards. However AT&T, Tmobile phones do. The best thing to do is call the carrier.