galih,
Thanks for taking the time to post your message. I sent my Teclast X80 Pro back to the shop after I found out the touchscreen response was also bad. I considered doing a wifi mod some weeks ago though.
I have learned an important lesson about trusting reviews ( especially when the shop moderates online reviews and supplies free gear to people for review)….and I learned not to trust ‘no name’ Chinese tablets. Now the long wait for a refund.
Thanks to this experience, I have never been happier with my current budget rooted tablets: they have great battery life, great wifi performance, far higher screen brightness, no uneven screen colours, far better contrast…ultimately good but low-resolution screens…and they are configured just the way I like them after months and years of ‘removing most of the spyware furniture’.
Thanks again for your help.