Use these steps to support network settings on the HTC One M8 for Windows.
On this page:
From the start screen, swipe left.
Scroll down to and tap Settings.
Scroll down to and tap cellular+SIM.
Scroll down to and tap SIMsettings.
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.
Scroll down to and tap SIM settings.
Tap Network selection.
Tap search for networks.
Tap to select the desired network.
Tap Highest connection speed.
Tap to select desired band.
Airplane mode turns off wireless connections. This allows app and menu use, but prevents voice or Internet use.
Tap Data roaming options.
Tap roam or don't roam.
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