Steps of Update:
*Firmware update cannot do "SKU conversion" and downgrade version.
Wrong SKU may cause update failure, You can only update your SW version on
the Same SKU
*How to check SW version of your PadFone2?
Path: [Settings]-->[About PadFone]-->Build number
Example: You should be able to see the build number CHT_PadFone-9.X.X.X, where
“CHT” means SKU.