After doing below commands the wifi works in Ubislate 7c+: a) Install "terminal emulator" in the device (copy the apk to device using memory card or data cable connection). b) Open terminal emulator type the following two commands & press enter after each > su > insmod /vendor/modules/8192cu.ko c) Open wifi in the settings and on/off wifi d) It works!!! WiFi will be worked till reboot. After reboot/restart device you need to run the command again Terminal Emulator.