I am using mtnl delhi broadband and using the wifi router provided by the mtnl. Past 2-3 days 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.