After installing the SIM or storage card, make sure to replace the back cover properly.
HTC One VX face down on a flat and smooth surface.
Align the top part of the back cover with the back panel of
HTC One VX.
Gently press the back cover and then run your thumbs along the sides up to the bottom.
You’ll hear clicks as the back cover locks into place.
Make sure that the back cover is tight and there are no gaps or bulges on any side.