Your portable WiFi hotspot is working just perfectly until one day, it does not turn on. No wireless internet, no internet service. No response to any button you are pressing. Another thing that may be happening is that your start screen freezes once it is turned on and none of your WiFi-enabled devices are able to connect to your device. You may think that your portable wifi hotspot is broken. However, as you ponder on about all the possibilities, you realize you didn’t do anything wrong with it like drop it in a tub of water or drop it hard against a hard surface. Inconspicuous of any noticeable damage, you wonder what could be wrong with your device. There is no way that it is completely drained out of battery because you just charged it last night.