I have a DOOGEE S60 with Android 7.0 Nougat.
It can connect to my 2.4GHz WiFi network at home without problems. However, quite frequently, the phone disconnects, showing the message "authentication problem" below the SSID. Manually reconnecting then temporarily fixes the problem, until the next random disconnect.
I have an ASUS RT-AC66U with Merlin firmware. The WiFi network uses WPA2-PSK+TKIP/AES. The phone is not rooted, and I'd like to keep it that way.
- The phone maintains a stable WiFi connection on my company's network; this other network uses WPA2-PSK TKIP.
- Switching the WiFi on the phone off and on again, rebooting the router, rebooting the phone, forgetting and re-logging into the network, etc., all have no effect
- Same behavior occurs when using a 5GHz network (the ASUS router is dual-band)
- I have 23 other devices; they all connect to the same network without any problems whatsoever.
- The network does not employ MAC filtering or other such smoke-screen type security measures
- There is nothing relevant in the router's logs
- Disconnections occur completely randomly; sometimes I have difficulty maintaining a connection for longer than 2 minutes, sometimes it lasts the whole night.
- It does seem to be related to which apps are used. Particularly ad-infested apps seem to cause more frequent disconnections.
...I have no idea how to even begin diagnosing this extremely annoying problem. Any ideas?