N450 WiFi problem

Hi all,

I did a quick board search earlier on this issue but cannot seem to find a solve.

I recently got the Netgear N450 CG3000DV2 model so I don't need to pay Comcast monthly rental fee.

Howeve, noticed that there are a couple of times that my iPhone/iPad would suddenly lost wifi connection. When trying to re-connect, it keeps asking me to re-type wifi password but would not connect. I had to un-plug the power of router and re-plug it to solve the issue.

Not sure if it's across all devices, I have Nest cams too but they seem to still connect to Wifi when my apple products are down. 

Does anyone one know if there's a solve for this or could be a unit malfunction problem? Thank you in advance