I installed the stock 2.3.3 on my tmobile 3g tab 7 everything runs great...I started playing with the modems I installed Telestra Modem JJ3 (support for 850 bands): I am using a atat sim card and tab is unlocked using 3gs unlocked pro...I Can make calls but no internet works at all, it shows edge in notification bar but will not connect with browser...I used this apn settings and still no internet
AT&T (US) 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:
MCC:310
MNC:410
APN Type: leave blank