Problem with Wi-Fi passwords on iPhone 5

I own a Jailbroken iPhone 5 (6.1.2). Whenever I try to connect to a Wi-Fi network, apparently the password is incorrect. I have checked multiple times, and I'm entering the password in CORRECTLY. This is happening on multiple routers, not just one. Also, I managed to connect to my Wi-Fi network when I leave it without password, but that will allow everyone to join my network. I would like to know how to fix it.

Things I've tried:

-Reset network setting
-Reset all settings

I would like to know if there's a way around apple not signing previous firmwares. Because that way I could just restore to 6.1.2 and re-jailbreak. Or maybe a tweak that resets all contents and settings without removing the actual jailbreak.

Could be an actually issue with the JailBreak. Why don't you get a more customizable phone? If you wanted to customize the iPhone to such an extent, why not just get some other brand of phone which you can change and apply add-on's too without the fuss? I flunked out of Apple Training, I applied as a specialist and lost interest, from what I heard no matter what you do, jailbreak will always give you some type of issue.

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