You can set your mobile phone to find a network automatically or you can choose a network manually. If you select a network manually, the network connection will be lost if you're out of range of the selected network.
Step 1 of 10
Find "Carrier"
Tap Settings.
Step 2 of 10
Find "Carrier"
Tap All.
Step 3 of 10
Find "Carrier"
Tap More.
Step 4 of 10
Find "Carrier"
Tap Mobile network.
Step 5 of 10
Find "Carrier"
Tap Carrier.
Step 6 of 10
Select network automatically
To select a network automatically, tap Choose automatically to turn on the function.
Step 7 of 10
Select network manually
To select a network manually, tap Choose automatically to turn off the function.