Wifi Router not in range

[Android Central Question]

The wifi router is been connected to other devices in the house normally. But to my Samsung j5 I cannot find the router name on scan. Sometimes all of sudden it gets detected and gets connected n then goes out of range again. Tried restarting the router n disconnecting as well but nothing works. Can anyone help me out with this issue?

 

[Rukbat]

Anything large and metallic between the phone and the router, especially a microwave oven?