How to change Android device's Wi-fi connection
Open the device
Press small back -button on left lower corner of the screen
Now you can move to settings screen.
Volume slider appears on right side of screen. Press settings button (circled in red)
Please note! Slider shows up only for 3 seconds!
Now you can change the device settings.
Press arrow on left upper side of screen.
Press Network & Internet
Please note, check on/off toggle on right side, toggle should appear blue as in picture.
Choose the wanted Wi-fi network you would like to use. Depending on the network you may be required to input a Wi-Fi password on the device.
After this, please reboot the device!