1 Find "Carrier"
Press Settings.
Press Dual SIM & Cellular.
Press SIM1.
Press Carrier.
2 Select network automatically
If you want to select a network automatically, press the indicator next to "Choose Automatically" to turn on the function.
3 Select network manually
If you want to select a network manually, press the indicator next to "Choose Automatically" to turn off the function.
Press Off.
Press Off and your phone will search for networks.
Press the required network.
4 Return to the home screen
Press the Home key to return to the home screen.