Issue: WiFi keeps disappearing from all devices and sometimes could not connect to the device. Happened from the day of purchase.
Things done so far: Have done many factory resets and the issue keeps coming back. A temporary fix is to turn the device off and on in which the WiFi would appear. However, it will disappear again hours later. Have read through articles regarding the problem and arrived on the conclusion that it is the firmware's fault.
Question: What is the best firmware for my model to downgrade to?
