US AT&T iPhone 5 SIM on Omate TS, Voice is good but data not working topic

Hi All,

Device: 1900 1/8 TrueSmart (US)
ROM/Firmware version: (stock)
Baseband: MOLY.WR8.W1315.MD.WG.MP.V4.P1, 2013/11/09 14:19 (stock)
Changes made to stock firmware: Framaroot + Play Store apk installed
What OS is on your PC if your PC was used: N/A

Issue: I took my US AT&T iPhone 5 SIM (with a nano to micro adaptor) on Omate TS. The voice call is clear and no problem at all. TS recognized the phone number right after a reboot. However there's no data connection.

Steps Taken:

The Wireless & Network/SIM management/Data connection shows ATT.
The Wireless & Network/SIM management/More/Mobile Network/ shows
1. Data connection: ATT
2. 3G service: Enable 3G/ ATT
3. The APN is correctly generated
4. Network operator: Manual or Auto, it will only let me choice the ATT 3G.

However it won't connect any data.

in Setting/System/About TrueSmart/Status/SIM Staus
Mobile network state is "Disconnected"


I tried another SIM (US AT&T iPhone 5S), same result. I read in the other tread someone mentioned that the US AT&T iPhone will lock to IMEI, but those 2 SIM is swappable between my 5 and 5S...

Any idea? Thanks in advance.