wi-fi Problem

It sounds like you bought a defective phone. One thing to try is to restart your router by removing all power from it for about 30 seconds, but if that doesn’t fix it your phone has a hardware problem.

I have no idea what you are talking about.

Actually, Google Translate to the rescue! Usually the symptom you describe is caused by a broken Wi-Fi antenna or antenna connection. It can easily be damaged by a careless repair.

Në fakt, Google Translate në shpëtim! Zakonisht simptoma që ju përshkruani shkaktohet nga një lidhje e prishur e antenës Wi-Fi ose antenës. Mund të dëmtohet lehtë nga një riparim i pakujdesshëm.

Apple does not repair phones, they replace them for a flat fee. You can try an independent repair shop; if they can do it the price should be reasonable. Going that route would void any warranty. If it is in warranty it won’t cost anything if you have Apple repair ti.

I’ve heard of it on broken phones.