Wifi not showing up on phone

[jiaxuan12092005]

I am from Malaysia, I have been using this wifi for 7 years but until a few weeks ago it disconnected and not showing up in the wifi settings,but in the morning it reconnected and everything works just fine. But yesterday night when I came home from tuition (it works just fine before I went to my tuition) it completely disappeared , whereas my family can use it just fine. I tried connecting it manually by typing in the wifi and the wifi password but it says it can't find this wifi, so I've been using my mom's hotspot since. Can anyone please help me

 

[Saga Lout]

Have you looked in the router's settings to see if something is wrong? If you have a PC or laptop running Windows, post back for information on how to get there.