(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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