iphone 3gs 4.1 upgrading to 5.0, keeping unlock?

[d12]

i have an iphone 3gs 4.1 firmware, i want to upgrade it to 5.0 without losing my unlock? is it possible?

[Invincible]

no
still unlock is not available
i prefer u to wait .......
when it carrier unlock will b available then u can upgrade to iOS5

[Unregistered]

i have an iphone 3gs 4.1 firmware, i want to upgrade it to 5.0 without losing my unlock? is it possible?

Do you have temporary unlocked iPhone 3gs or permanent unlocked device ? If your iPhone 3gs got unlocked for temporary purpose, surely it will re-locked to your carrier . If you want to avoid such situation, use Remote unlocking method to unlock your iPhone 3gs before updating it . After unlocking your device, you can upgrade its ios to any of the latest firmware version . It won't gets locked again . Because, it is one of the permanent unlocking solution for iPhones . You can get this service from any of the online vendors like OnlineGSMUnlock.com to unlock it in a safe manner . It doesn't requires jailbreaking .