Gl mt300n v2 mango

help me please i have gl inet mt300n v2 with sierra 320u usb modem with cellular network. when i connect this modem it’s connected and can acces internet, but after 30 second or 1 minutes i accesing the internet, my wifi suddenly off and disconnecting my modem, and back online in sec. this happen repeatedly, and also happen with my LAN cable too. firmware is uptodate and i also try to connect other modem and found same problem. sorry for my bad english, help me …

help me please i cant solve this problem

I think the router does not get enough power. Connect it with a USB adapter directly into a power socket. Don’t connect it via a USB port on your PC.