invens royal r2 frp reset using this tools:
https://www.4shared.com/rar/jEsUxBeJca/my_phone_my_28s_frp_reset.html
press volume down and power, reboot to bootloader, open my phone_my 28s_frp reset folder, select Myphone M28s.exe, insert usb then type YES and ENTER, done
press volume down and power, reboot to bootloader, open my phone_my 28s_frp reset folder, select Myphone M28s.exe, insert usb then type YES and ENTER, done
for reference