I also have a Zenithink ZT280 C91 4.0.3 and the touchscreen stopped working after 3 months. Can't reach seller. How did you get in touch with Zenithink? This is supposed to have a one yr warranty but I can't find out where to ship it to in the US for warranty service? Any help would be...
I have the same problem. Did the update from the Zenithink website with no results. How did you get in touch with Zenithink? I emailed them with no response. Do you know of anyplace or one who will service these tablets?
Search for User Guide for your version of Android.
Search for User guide on this site to see links to PDFs for the various Android versions:
My Zenithink tablet is loaded with 4.0 (aka ICS or Ice Cream Sandwich).
I found this 140 page PDF Galaxy Nexus...
Bought one of these tablets from a Texas Vendor and we're coming up a steep learning curve - with a heavy emphasis on using the "discovery method" due to limited information from the tablet maker.
We are experiencing trouble with the built-in microphone barely working.
We tried Skype loop test...