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When you turn on the phone, it automatically selects a network within range. In certain circumstances, it might be useful to select a network manually, for example when you are abroad where different networks are available (depending on which operators your operator has roaming agreements with). Follow these instructions to choose network.
Find "Network operators"
Select network manually, go to 2a.
Select network automatically, go to 2b.
2a - Select network manually
A list of available networks is displayed.
Press the required network.
After a moment the display shows whether you have access to the selected network. If the display shows that you do not have access to the selected network, it is because your network operator does not have a roaming agreement with the network operator in question.