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Prior to the update everything was working fine with ios15, now after update to ios16 I started having problems with the WI-FI 5ghz. As I understood this problem appears on devices iPhone SE 3rd, 13 and 14. The problem is in Wi-Fi channels. Wi-Fi works totally fine with channels 35-48, however...

i got refurbished today(2017-02-02) then the engineer open the white box and gave a refurbished new? phone!! and i saw the diagnosis log but, some log says this happens at 2016-12-15-20:11 i heard that no one can use the refurbish phone before engineer openning the box, but that log says --"...