Iphone 3gs work with tmobile?

I have an Iphone 3gs, 4.3.1 baseland 05.16.02. I've tried everything to try and unlock it so that I can use it with the Tmobile carrier, but nothing is working. It's already jailbroken, does anyone know how to fix this?

You can restart again then install jailbreak unlock it will work carrier for you. That's all

You can unlock your iPhone 3GS by Remote unlocking. The unlock is permanent and you can get this unlocking service from online sites.http://www.unlocking4u.com/apple-iphone-3gs/rs6wp9/ is where i unlocked my iPhone, Check it out!

Don't worry i will help you to unlock I-Phone 3GS… You can visit the site http://www.simpleunlocking.com/apple-iphone-3gs/rs16wp9/ get remote unlock service at reasonable cost and get free Unlocking instructions at http://www.mobileunlockguide.com/apple-iphone-3gs and unlock it step by step… Then use with any GSM Network sim card… You need to specify current network, country it's locked now and get the unlock service and unlock it easily.

You have to jailbreak this and unlock this via software.

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