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Hello,
I just got my new 3G iphone today and It came up with 2.2. 1, so that I downgarded to 2.2 and the modem therein (baseband) is 2.30.03. That is why my question is how do I get my unlock iphone 3g with 2.30 baseband??? Or what I do, to work with Tmobile ...
Help me ........
Jailbreaking as possible, but not software unlocking. For that you must buy something like a turbo SIM. The software for jailbreaking, try PwnageTool.
See the threads below, which may help you :
To unlock iphone 3g with 2.30 baseband:
1. Download pHasebandowngrader here.
2. Connect via SSH to your iPhone
* Open MobileTerminal
* Type “login”
* Default login/pass is root/alpine
3. Copy the downloaded “phasebandowngrader” folder to your iPhone’s “Applications” folder
* The folder MUST named phasebandowngrader with lowercase letters!
* Type “cd /Applications/phasebandowngrader && ./phasebandowngrader”. Follow the screen instructions
4. Execute pHasbandowngrader
* Type “./phasebandowngrader”
5. You should now be running iPhone baseband 2.30!
The phasebandowngrader is only intended for use on iphone group that were accidentally continuous process to the latest 2.30 baseband therein. The same users are now looking to open up their iphone 3G to around the world can now have their downgrade baseband and use the yellowsn0w utility from cydia.