Great news, folks! All variants of the Samsung Galaxy S II on US wireless carriers AT&T, Sprint and T-Mobile are now root-able. We’ve already covered how to root the Epic 4G Touch, and today we’ll go through the method with which you can root T-Mobile’s Galaxy S II variant.
The root method comes from Rootzwiki – a popular forum for Android hacking/development – in a post from developer slayher where he goes through the different modalities of the whole procedure.
How To Root T-Mobile Galaxy S II On Android 2.3.5 Gingerbread
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Sim Unlock Samsung Galaxy SL Latona I9003 in easy steps
1 You need to have ADB and The correct drivers installed,
2 download this zip and extract it : unlock_i9003
3 On your phone go to Settings>> Applications >> Development >> (Make shure that usb Debugging is ticked)
4 connect the phone
5 Double click unlock.bat and wait for the phone to reboot
6 You’re done