The phone is GSM, and so AFAIK Sprint being CDMA, it won't work on them. Try T-mobile or AT&T in the USA.
Also, don't worry about an operator rejecting it, just take any SIM card from an existing contract, or a PAYG SIM and pop it in and voila!
AFAIK operators do not do effectively a "User-Agent ID" check on the phone model it's normally the phone that prevents you registering with non-allowed providers which locks the phone. Even if they did do a check, how long do you think it would take someone to change this phone to report itself as a Nokia :P
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RE: Finally
The phone is GSM, and so AFAIK Sprint being CDMA, it won't work on them. Try T-mobile or AT&T in the USA.
Also, don't worry about an operator rejecting it, just take any SIM card from an existing contract, or a PAYG SIM and pop it in and voila!
AFAIK operators do not do effectively a "User-Agent ID" check on the phone model it's normally the phone that prevents you registering with non-allowed providers which locks the phone. Even if they did do a check, how long do you think it would take someone to change this phone to report itself as a Nokia :P