Here in El Salvador, Central America, I have help unlocked more than 15 iPhones, I can confirm that we have no problem working with the 4 cell companies in our country, DIGICEL, TIGO, CLARO & TELEFONICA. THANKS TO EVERYBODY FROM THIS FORUM, without your help this could not be possible, and sorry for my spelling!!!

Incoming Calls : Yes
Outgoing Calls : Yes
Incoming SMS : Yes
Outgoing SMS : Yes
Edge : Yes, (FOR THE 4 CARRIERS)
Wifi : Yes