Sony Xperia TX LT29i Working Instructions page 177

Go/NoGo Testing
Follow the directions stated in 'Go/NoGo Test Script Parameters' to be found in
1220-1336: Generic Repair Manual – electrical, together with the 'Attenuation Factors' below!
This phone is available in one version, LT29i, including the following bands:
LT29i:
GSM-850/900/1800/1900
WCDMA-850/900/1700/1900/2100
1266-5133 Rev 1
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Sony Mobile Communications AB – Company Internal
Test and Calibration Repair Instruction Electrical/
5(8)