Hello, I have a Polaroid MPC700gpr001 tablet. I tried option 81 (and 2) and also added 'rt3070' and 'unphone'. -> problems with both touchscreen and using an external USB mouse. I also tried option 7 and 8. Both work great with the USB mouse. Touchscreen doesn't work at all. Does anyone know how to get my Polaroid tablet work again. Thank you!!!