Poor Wifi signal or no wifi

Hi,

Lately my formuler Z7+ has not been detecting wifi, or when it does the signal is very poor (1 bar). I have done factory reset, but the problem still persists. All my other devices such as phones and laptops are showing full range and excellent speed.

Any idea on how to fix this ?

Quote from SAM

Try to give your box static ip and change in router settings other 2.4Ghz wifi channel.

Do i change it on the Formuler Z7+ or on the modem ?