Use these steps to support network settings on the Sony Xperia Z.
On this page:
The device detects and registers on wireless networks inside T-Mobile’s calling area, but roaming networks are usually restricted to T-Mobile SIM cards. You can manually select a network only in areas where T-Mobile does not own GSM spectrum.
Tap Network Mode.
Select from the following:
Airplane mode turns off wireless connections. This allows app and menu use, but prevents voice or Internet use.
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