(T-box UHD) SIM card works fine in the car, but indoors, no internet connection.

 I put my SIM card plug into my car. Everything works well.  But when I bring the AI Box into my house, no internet connection.  The SIM card is not recognized anymore.  It says no sim.

To have the SIM card recognized on a TV, the box needs to be switched to TV mode.

1. Create a new txt file named adbDeviceMode in the TF card. The content of the file is 1. 
 
2. Turn on the adb mode of connecting to the computer. The content is 0. Switch back to the mode of connecting to the head unit.
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