My AT&T note 4 has been doing the same for the last four or five days. New battery, wiped the cache, nothing helps. Trying to avoid factory reset...again. Any ideas?
I have had the same issue, I didn't think that it was from the security update but that makes a whole lot of sense now cause I never had this problem before...
My recent update has fixed the issue, I haven't had the WiFi act weird for about 2 weeks now