"Your SIM card does not allow a connection to this network"when this aper on searching mobile network manualy, than you can do this step to resolve that problem
1. Open the phone dialer
2. Enter: *#*#4636#*#* (Once entered, you will be taken directly to a "Testing" page)
3. Tap Phone Information
4. Scroll to the bottom of the screen and you should see a button that says radio off. Hit this button and when it reads radio on Hit it again to turn the radio back on.
then you can "run ping test" for make it sure...
hope can remember it and halpfull