Hello againi think i find the problem cause thiswhen this device get hot (for example put this device in bag or cover it) the wifi get disable;try use this device in cool place or make it cool may...

this is new device and 2 week i buy & use it 1-2 on /off this device per day and it is a chance that enable wifi or not. i removed battery and reinstall battery not solved the problem reset factory...

Model : Hardware Version : Not Clear Firmware Version : ISP : Hi i buy TP-link M7350 and after 3-4 time on / off my device WiFi not enabled at Boot and logo not shown in display - try remove battery...