Enable Internet sharing on ATT Lumia 920 w/T-mobile US after cyan update.

andrewyang

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Dec 19, 2014
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Prerequisite: unlocked AT&T Lumia 920 that can flash any roms.
There are many tutorials out there explained how to flash any roms on AT&T Lumia 920. If you are using att stock rom, flash rogers pre-portico rom first.

Steps:
1. If you are on pre-portico rom, please update multiple times until first 3046.xxxx.xxxx.xxxx version shows up. This takes long time..... Then, you can flash any 304x roms. Please skip this step if you can already flash any 304x roms.

2. Using Navifirm+ to download a french rom, RM821_059S6R5_3051.50009.1424.0002.
Use Nokia care suit to flash the rom on your phone.

3. Go to access point and make sure a profile called 'T_Mobile' is there.

4. Go to phone update, update your phone to 3051.50009.1424.0003.
Now you should be able to turn on Internet sharing.

5. Update your phone one more time to 3051.50009.1424.0004, the internet sharing still works.
 

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