1. If you wanna to use internet with GSM sim on Huawei C8950D, dial *#*#2580#*#* 2.A popup box shown as "GSM Data Connetion" 3.Mark the Box 4.Reboot your phone. 5.Now you can set your country GSM carrier APN and success to use GSM internet. IF not shown "GSM Data Connetion" popup box, Download this ,extract and install the setting.apk include at downloaded file and reboot once When the phone is total wake up, try again from step 1.