Check the figure shown below.
Through the hardkey
“
down
”,
“
up
”,
“
OK
”, to
operate on the recovery menu.
Select “
update from USB equipment
” or “
update from external storage device
” (SD
card), enter the sub-directory and select the upgrade packages, click on “OK” key to start
upgrade. After the success of the upgrade, there will be prompt on interface, the user can
immediately return to the main menu select “reboot system now” to restart the system to
start using the new version. Incompatible problems, needs to remove user data and
system cache (the so-called double wiper) whether you need specific clear.