[Q] will this factory restore works? SGPT1211US/S

[urgas]

hi all experts

I have Q? will this guide works

I have SGPT 1211 US/S I want add all back to pre-factory setting

I want download one of OTA ROM from Sony

after unpack by :

7za.exe x update_desklunvr.zip system.img
7za.exe x update_desklunvr.zip hidden.img


ad all system.img hidden.img to working folder: _ firmware of ''S.onyTablet.S [FLASHER] v3.0''

and after reinstall all

will this works???


or is the chance extract from second new tablet and make clone? and how