The Universal i-Smartphone SIM Unlock Card slots between your target SIM card and the 6 pin socket and provides instantaneous unlocking power. This means you can stick any SIM card into your handset and it should work, even if the phone is locked to a particular provider.
Do note that they don’t say that it will work with *all* SIMs, so it may be wise to check first to make sure your phone is covered. Priced at $4.15.
Unlock Most GSM /work with 3G Sim Cards. # The i-SmartSim is a thin film that fits in between your sim card and the 6-pin # Does not influence any communication between the phone and the network. # Real time on the fly communication modifications, does not reroute SIM card traffic (Its transparent to the phone). # NO software and no technical knowledge required.
they'r talking about iphone 3g…do you think it will work on a 3gs or even a 4?