A:AnswerIt depends on the cell service carrier and their coverage area. Research the carrier coverage areas before you sign up for service. It will save you lotsof trouble to know what options you have in your area.
A:AnswerYes. Its a GSM phone and compatible to many countries with GSM platform. Can't work on CDMA applic for like Verizon & other AT&T regional application or other service provider that are using non GSM network. Its clearly shown on J3 feature specs including many other Quad Band cellphone handset (ie: BLUE; Moto & etc.). Store staff should have known these compatibility issues.
A:AnswerResearch the coverage areas with all the carriers that will work with this phone. Verizon and Sprint do not work with this phone when purchased as an unlocked phone. If Verizon or Sprint sold a phone with their plan, then that phone is only used or compatible with those cell phone carriers that sold it.
A:AnswerAT&T supplied a new sim card and transferred photos, contacts, etc from my old phone at no cost. These phones are unlocked and should work with most major carriers. You might want to give your existing (or new) carrier a call to confirm that they will activate this phone.