I use my hotspot a lot and it has always worked. However, today I turned it on and tried to connect my computer to it but it wouldn't work. It just says it cannot connect to the hotspot. So, I turned off my phone, took out the SIM card, put it back in, powered it back on, and tried it again but the hotspot still did not work. I tried connecting other devices to it and they did not connect either. Any help?