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Samsung Galaxy S7 edge
Troubleshooting
If your device isn't working properly, you can try several solutions to solve the problem.
In most cases you can solve the problem by following these guidelines:
Cause 7 of 9: You've activated manual network selection and are out of range of the selected network
1 Find " Network operators"
Slide your finger down the display starting from the top edge of your mobile phone.
Press the settings icon.
Press the settings icon.
Press Mobile networks.
Press Network operators.
2 Select option
Select one of the following options:
Select network manually, go to 2a.
Select network automatically, go to 2b.
Select network manually, go to 2a.
Select network automatically, go to 2b.

3 2a - Select a network manually
Press Search networks.
Your mobile phone searches for networks within range.
Your mobile phone searches for networks within range.
Press the required network.
Your display will tell you if you have access to the network you've selected.
Your display will tell you if you have access to the network you've selected.
4 2b - Select a network automatically
Press Select automatically.
5 Return to the Home screen
Press the Home key to end the session and return to the Home screen.