I'm a POS-Devloper
My A920 shows only a white screen when rebooting by removeing the battery. A kind of launcher is startet but with no content. I think is mis-configured something when i tried to install our POS-Client. Is there any possibility to reset the device to a factory default?
Thank you for your inquiry.
We will get in touch with you via email as this inquiry is more related to your device then the process itself.