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regarding inability to detect wifi signals

Hi! My mobile Samsung J7 Nxt is recently very poor at detecting wifi signals.Whereas other mobiles detect multiple networks of strong strength,my mobile interprets as a weak signal even to that a of a close router.I think its range has fallen.I dont think its a software issue since i have done a factory reset.Will chaanging The WIFI IC do?

I have found many articles but they always show software solutions which i have tried and failed.Some Videos on Youtube Claim to solve The Problem Of Wifi not turning On Which they solve by replacing the IC.However,that happens not tobe precisely my problem since my wifi is turning on but "scanning for available nnetworks'' and rarely does it show any wifi that also has to be the strongest streghth.Also,My bluetooth is working fine.

Help me on what do i do