Hi, I bought yesterday this modem 4g, but it keeps disconnecting every 20-30mins, making it not usable. I had to go back and use my old one (which is slower but at least works fine), as each time the

Issue: after approx 25mins the device switches itself off Battery: fully charged Resolution: power back up. works again for approx. 25mins then switches itself off again. Is this a device fault?