G2 Won't let forgetting wifi passwords - G2 Q&A, Help & Troubleshooting

Hello all
Basically, my g2 wont let me connect to wifi network if i entered a wrong password or if the network password has changed.. It just keeps remembering the first password i have entered.
I have tried searching for the forget password function but no luck..
Any help?
Lg G2 D802
Stock 4.4.2

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Troyman said:
Hello siva992, put it back into the two new password in the computer I use only four digits, not failed. Remember to use new numbers, not the same as you have before. Good luck.
Click to expand...
Click to collapse
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siva992 said:
Call me stupid, but I'm really desperate and begging for help! I used the Android Device Manager on my Tab 3 8.0 to remotely lock my phone. So it worked. But when I used the password to unlock the phone that was set earlier on ADM, my phone keeps saying that it is the wrong password.
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Click to expand...
Click to collapse
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this method worked on my nubia mini and i thing technically it might work on every android phone that is capable of booting into recovery mode.
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techcraze said:
there is a strange problem now that my mobile loses wifi passwords, everytime after rebooting it asks for password also takes much time to connect, and when i tried connecting at my friends place its not detecting the wifi router its get stuck in scanning, kindly help!! I tried factory reset, flashing different csc stock rom but still problem exists, also auto network switch is not checked. Kindly help!
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