Use these steps to support network settings on the Apple iPhone 6.
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These settings are automatically set to the correct values with the Carrier Update when a T-Mobile SIM is inserted. You are unable to edit APN settings in iOS 9. To ensure you have the correct settings, reset your network settings.
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.
Airplane mode turns off wireless connections. This allows app and menu use, but prevents voice or Internet use.
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