Wifi problem
Im a iphone 6s user n i didnt upgrade the new iOS software 11.2.1 is it connected with my problem below?.. when i tried to connect it to my wifi network it says the password is incorrect( i know it’s correct) i think it´s not my router because my ipad wifi work normally. i tried to reset network settings, reset the iphone and restoring it too but doesn´t worked. maybe changing wifi antenna would fix it? or it is a wifi module problem?