Question about Apple iPhone 3G
How to unlock this phone
Posted by Anonymous on
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Posted on Jan 02, 2017
Unfortunately, it won't work.
AT&T is using 850 and 1900 (UMTS band II/V). T-Mobile USA is using 1700 and 2100 (UMTS band IV).
The iPhone 3G supports "UMTS/HSDPA (850, 1900, 2100 MHz)"
Only one T-Mobile USA frequency is supported by the iPhone 3G, which, as you've discovered, is the Edge network.
Posted on Apr 27, 2009
Welcome to Fixya Premium Support
To Unlock iPhone 3G Firmware 3.0, Download Ultrasnow.
1. Upgrade iPhone OS to 3.0 if not yet done
2. Jailbreak the device using PwnageTool or Redsnow.
3. T-Mobile USA users need to turn off 3G mode.
4. Ultrasn0w works only on Baseband 04.26.08.
Installation procedure of Ultrasnow from cydia.
1. Run Cydia
2. Add the repo repo666.ultrasnow.com
3. Search for Ultrasn0w, install it
4. Reboot your 3G iPhone
5. Done !!!
I think it helps
Posted on Jan 02, 2010
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