I am using mtnl broadband and using the wifi router provided by the mtnl. Devices connected to wifi router automatically disconnects even though full signal of wifi is coming and devices are also not able to reconnect to wifi router until unless I restart wifi router. Wifi then will work smoothly for some period of time before same problem comes up. I have to restart wifi router then. this usually happens during day period(very frequent) and during night it works ok. I have 3-4 devices connected to wifi router and it was working perfectly fine before.