Download the logo file, then upgrade as the following procedures,
(1)copy the logo file into the root directory of TF card , insert TF card into the TF card slot
(2)Press left side of function key ，do not let go your hand ,then press the power-on menu, enter into the recovery mode
(3)when selection menu appear on the screen , click "wipe data/factory reset"
(4) click "yes--delete all user data"
(5) click "reboot system now"
Click the middle icon of the three icons in the right side, find your installed application icon , click it and do not let go your hand, wait a few seconds, it will appear on your desktop . click it again and do not let go your hand , then you can drag it to where you want to place it .
Click the icon which you want to delete and do not let go your finger ,when you see it get bigger ,drag it to the dustbin in right side.
The postfix of the software must be "apk", copy it into u-disk or TF-card ,then connect it with tablet, find the software package.click it and follow the instruction to install it.
Click "setting"---application—manage applications ---find the software which you want to uninstall , click it ,follow the instruction click "uninstall"—click "ok"
When finish the installation of Input Method Software, click "setting"--"language&keyboard" ,then click the Input Method you have just installed , click it to close the page when finished, click "browser", click the input box, when you see the keyboard, click the input box a little longer , when you see "edit text", click the "Input Method" , then click the Input Method you just installed , press the backspace key to return , re-click the input box and you can use your Input Method just installed .
Click "setting"--"language&keyboard" --"select locale"—then drag it upwards or downwards to find your language , then click it.
Click"settings"---"wireless&networks"—activate " wifi"&"wifi settings"—find the wireless router you want to connect ----input the passwords---connect
Click the icon which you want to delete and do not let go your finger ,when you see it get bigger ,drag it to the dustbin in right side.
(1)Use the OTG-USB cable connect the tablet PC and computer
(2)when the USB icon appear on the status bar, pull down the status bar
(3)click "USB connected", turn on the USB storage
(4)then you can see the file of tablet pc in your computer .
(1)use the mini-HDMI cable to connect the tablet with with TV
(2)when the HDMI icon appear on the status bar , pull down the status bar
(3)click "HDMI switch" then choose one among them
HDMI 480P or
HDMI 720P or
HDMI 1080P
Then you can see the computer screen on TV screen .
(1) close WLAN, camera, brower and other function, when program is finished, user can press backspace key to exit .
(2) when program is finished, shut down the screen for saving power .
(3) if play video or navigate for a long time, please connect the charger at best.
(4) set the time of automatical lock screen 15 seconds
(5) according to your actual demand adjust the screen brightness(low brightness can save power )
(1)create a file in your root directory of TF card ，and name it "ZT-update"
(2)unrar the burning package, and Copy files into ZT-update in the TF card
(3)insert TF card into the TF card slot，
(4)connect the charger,
(5)Press left side of function key ，do not let go your hand ,then press the power-on menu(when you see something on the screen appear, let go your hands )
(6)Follow the instructions appeared on the screen, the device will do the upgrade and restart by itself
(1)Copy burning files into the root directory of TF card
(2)insert TF card into the TF card slot， Press left side of function key ，do not let go your hand ,then press the power-on menu(when you see something on the screen appear, let go your hands )。Follow the instructions appeared on the screen, the device will do the upgrade and restart by itself,
notice:connect the charger when burning
evdo：ZTE MF110,HUAWEI EC122，HUAWEI EC189，Qualcomm...
wcdma：ZTE AC581,HUAWEI E1750,HUAWEI E1752...
(1)Insert the 3G usb dongle，click "settings" ---"wireless & networks"
(2)Disconnect any wireless
(3)click to turn on 3G, choose which model you want EVDO or WCDMA, save it ,then shut the tablet down , then restart it .
(4)wait utill the wileless signal icon changed(about 15 seconds), until the 3G icon appear
(5)Return to desktop, you can surf the net
(1)Create a new directory and name it as "zt-update".
(2)Put the firmware which you get or download into "zt-update".
(3)Put the TF card into TF card slot, then press the "Camera" button at the same time to press the power-on button, then operate as per the reminders shown on the screen, the machine will be installed the firmware and then reboot.
Note: Android 2.3 Version is being released continuously.
(1) Create a new directory and name it as "zt-update".
(2) Put the firmware which you get or download into "zt-update".
(3) Put the TF card into TF card slot, then press the "Volume Minus" button at the same time to press the power-on button, then operate as per the reminders shown on the screen, the machine will be installed the firmware and then reboot.
video of burning procedures of the ZT280-C71
(1) Create a new directory and name it as "zt-update".
(2) Put the firmware which you get or download into "zt-update".
(3) Put the TF card into TF card slot, then press the "Back" button at the same time to press the power-on button, then operate as per the reminders shown on the screen, the machine will be installed the firmware and then reboot.
video of burning procedures of the ZT280-Z102
A power failure during the firmware writing operation may disable the tablet PC.
* Use a fully charged Battery or dedicated AC Adapter for the firmware update.
* Do not shut off the power during the firmware writing operation.
