Hello guys. Well ive seen that many of my friends who have the qteck 9100/cingular 8125 have troubles because they are dropping their calls. Some believed that it was a hardware problem. however i found a registry tweak that will fix this issue.

Use a registry editor like phm regedit (its great, because its light, easy and free user friendly registry editor) and go to the following node:

Hkey_Local_machine/drivers/builtIn/Ril

and add a new key called:

GPRSStallWorkaround

dword value 0

Softreset by pressing more than 5 secs the power button and ready, it works flawlessly.

Sorry for my english im not a english speaker native.

Best regards and i hope it help you.