Learn how to troubleshoot data connection problems. When you use a 3G, 4G, or 4G LTE-enabled device in a 3G, 4G, or 4G LTE area, the device automatically scans for the best available network. The device will display 3G, 4G, H or LTE next to the signal bars when successfully registered on a 3G, 4G, or 4G LTE network.
To troubleshoot a network connection issue:
T-Mobile network coverage
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