I used this thing to provide internet to an elderly friend. Plug a SIM card in it and and it works. Easy as pie. Sofar the good part. This thing locks up in a room where the temperature gets 25-27 degrees in summer. It remains locked up until you remove the battery and wait a little before putting it back. I found out afterwards that this is a design problem. The battery temperature sensor shuts down the device at around 30-35 degrees Celcius. So check the temperature of the room where its going to be in before ordering this.