How to Set up T-Mobile G1 for the ATT Network
Hey everyone, I just went through the process of trying to figure out how to unlock a T-Mobile G1 and use it on the ATT network. I was able to do it and believe it or not, so far it works flawlessly! I can download free apps, paid apps, and the data network works great! FYI ~ a2b works really well too!
Steps:
1) Get unlock code for your T-mobile G1. Call 1-800-T-Mobile customer care, tell them you’d like to unlock your G1. They’ll gather your phone info such as the IMEI, process your request without any fuss, and your unlock code will be emailed to you within 24 hrs. Btw, the phone I unlocked has never been associated with my T-Mobile account.
2) Take your ATT SIM and insert it into your G1. Turn the phone on. You’ll then be prompted to enter your unlock code. Once you’ve successfully unlocked the phone you’ll now be prompted to associate your phone a GMail account but DON’T! At this point, you’ll have to implement a small trick outlined in the next step.
3) Power the phone off the hold down the “menu” button and power the phone back on. Do not quit pressing the menu button until you see a “safe mode” transparent icon in the bottom left corner of the screen.
4) Once the phone has successfully rebooted and your in the safe mode, select the menu button again. Select APN Settings. Once at the APN Settings select the menu key again then “New APN”.
5) Configure new APN settings.
Name: AT&T
APN: wap.cingular
Proxy: leave blank
Port: leave blank
Username:WAP@CINGULARGPRS.COM
Password:CINGULAR1
Server: leave blank
MMSC: http://mmsc.cingular.com
MMS Proxy: wireless.cingular.com
MMS Port: 80
MCC:310
MNC:410
APN Type: leave blank
6) Save Settings
7) Now you either create a new GMail account or add your existing one. Btw, I’m guessing your ATT SIM will need to be data capable otherwise you won’t be able to configure our phone with an account. If this is the case, you might want to borrow a friends T-Mobile SIM and follow this how-to http://www.bukisa.com/articles/44515_how-to-activate-and-unlock-boxed-packed-t-mobile-g1
8) Once you’ve activated and/or associated your GMail account with the phone, you can now use your T-Mobile G1 with ATT.
9) Power off phone and reboot in regular mode (i.e. do NOT hold down menu when booting up). If you don’t, you will not be able to to launch installed applications from the market.
Hope this helps!
