Overmax Basecore 10 ii (reset/firmware reset/recover) There’s an overmax basecore 10 ii tablet which is in need of repair or updating.
So I thought that a factory reset will be enough, but it seems there is a little hitch, no volume button on the device :)

There is no key combination to get into the recovery menu, so I used “adb  reboot recovery” command to did this.  So my first question would be: is it possible to highlight the “wipe data/factory reset” entry without volume button? 

I tried to get a shell with “adb shell” command but the response was: 
- exec '/system/bin/sh' failed: No such file or directory (2) –

So I went to the official site to try to know more information about the device: 
http://www.overmax.eu/en/products,p8/tablets,c14/basecore,c2792/basecore10ii,c2890/#tab-3
It seems the Phoenix Suite is appropriate to reset the device’s firmware.
I tried to reset it but I got “fel2fes error” message which is not very suggestive. 

I googled about it but I couldn't find any useful information.
Could someone possibly help to reset the device ?
I found this topic while I was trying to factory reset a basecore 9, with no luck. But I just performed a factory reset on a basecore 10 so I'm sharing the experience with you. 

Due to its "missing" volume buttons its not that simple. You have to  connect a USB keyboard to it. ( I hope your device has USB hub also)


You have to shut down your device, and wait for 20 seconds. 
Hold down Power button and the other (house like) button until the Recovery menu appears. 
In the menu, you can navigate with your keyboard's Up and Down buttons, but the "Enter" button will be the Power button.


I hope it helps. Good luck, have a nice day :)