go to zenithink.com
click on download
click on zt180
click on zt180-102
scroll down to "
10" ZT180-102 (512MB+4GB) Android 2.2+F MID 20110613
This version suit to barcode model "XXXX_F" version.
click on local to download.
unzip files. open folder and copy and paste the files to a microsd card."sd card must be formated as fat32" . name the folder on the sd card u put the files in " zt-update " without quotes.
pluge the tablets power in
put microsd card in tf slot
hold the round button on face of tablet and power button same time. about 5 to 10 seconds.
the screen should read zt-update found then it will do the rest itself