1. Go to Settings

2. Go to Security

3. Go to Unknown Sources

4. Make sure unknown sources is checked

5. Download AndroDummper from here

6. Wait for AndroDummper to finish downloading

7. Install AndroDumpper

8. Open AndroDummper

9. Enable Location and accept the terms of use

10. Scan for the wifi networks around you by hitting the refresh button

11. Find a wifi network that you want to get the password for

12. Tap on that wifi network

13. Tap try to connect

14. If not rooted tap no root

15. Tap no custom pin

16. Wait for it to try and connect

17. It should be now connected

18. It will now ask if you are rooted to get the wifi password

19. Tap on grant superuser permisiion

20. It will now show the wifi password

21. You can copy the wifi password

22. Go to Settings Wifi and then tap on the wifi network you want to connect to

23. Paste the copied password