Why do 3 people next to me have t-mobile they have full bars I barely got one and I'm at homescreen when I go to get on the web its red or x? Thanks tmobile for the great deal
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Did you receive a new SIM card when you purchased this phone? If you are using one you've had for years, you may have a card that doesn't support advanced features.
Have you installed any apps lately that have been from third party sites? They could possibly interfere with phone function (no one's perfect).
Have you done a hard reset to see if it will correct the problem (battery pull, alt shift delete)?