I'm not being able to connect to ANY wifi networks

I used to be able to see my neighbors wifi network but now i cant. I cant see my own too. Ive got complete no sign of internet. My other family members can connect like normal. Ive searched for so many answers ( going near the router, turning off my main wifi thing and switching it on shutting down my device, taking off my case, updating my device and etc ) none of these work. Is it my device or the network? Even if none please give me an answer. Im close to giving up.