I have had a vivo tab for 8 years. At first I used it with cables accessories (keyboard, usb stick, etc ) so was very happy with it. After 2 two years I started to use (try to use) wifi and bt devices and found them to be buggy at connecting. I have updated the OS and all the drivers but to no good result. the tablet still works very well as.long as wireless is not needed. has anyone successfully used a wifi/ bluetooth dongle with these to fix the problem? or replaced the original wifi bt card?