Is it possible to unlock an iPhone 3gs w/out jailbreaking it?

[Perl Rodriguez]

Do you have to jailbreak it to unlock it?
Or can you jailbreak and unlock and then just go back to normal software
and still use it w/ T-Mobile or phone company's that use SIM cards?

[vicecaptain]

It is not necessary to jailbreak an iPhone for all unlocking methods. For example, You can unlock your iPhone 3GS safer and easier using remote unlocking service which does not require a jailbreak. You can get the remote unlocking service for an iPhone 3GS from www.Unlock-Zone.com at affordable cost with easy step by step unlocking instructions. This is a permanent unlocking method too. Once after unlocking your iPhone, You can then use any international GSM SIM card with it. Good luck.