Can I switch my SIM card between different manufacturers?
HI yes you can put your sim card in any mobile phone only if it is unlocked one ..Else if the phone is locked to some network provider then until you unlock it you can’t use it with your old sim card ..If you want to unlock your phone then have a look at sites like TheUnlockArena.com here they render unlock code for all mobile models at reliable cost …..After unlocking your phone you can freely use it with any GSM sim …
You can put your SIM card in *any* compatible phone as long as the phone is not locked. A phone can be locked in three ways – to a group of providers, to a single provider, or to a specific SIM card. Usually, AT&T locks their phones so that only AT&T SIM cards can be used. Since your SIM card is AT&T and both phones will accept all AT&T SIM cards, you should have no problem in putting the SIM card in any other AT&T phone, including prepaid ones! In fact, if you can find an unlocked phone, even from another service provider, your SIM card will work there too! GSM is awesome.
