Way to stay connected to guest Wi-Fi?

So I've been having an issue where my phone won't connect to my routers regular Wi-Fi thing, so i've been connected to the guest that's set up to our router. And it's awfully annoying to have to type the password to the guest Wi-Fi every time I lock and unlock my phone. Is there a setting I can make so I don't have to keep retyping the password? I have an iphone BTW.

My Iphone 6 Isn't charging correctly, anything I can do besides buying a new phone?

It started off with my original charger not working which led me to by a new one but a few days after, that one had stopped working. This trend went on for about a week and I ended up buying 5 chargers that all ended up going to ****. At first, I assumed I was just to hard on the chargers despite having them just sitting there but it as become apparent that something is wrong with my phone. With every charger I have, it has to be at some kind of angle for my phone to charge. I tried setting my phone up while it was actually charging and then just leaving it alone for a bit but every time I come back, it at some point randomly stopped charging. For these past 2 days, my phone has died and it takes hours for it to turn back on. This is getting really annoying is there any way for me to fix this issue without buying a new phone?

Locked out of iphone? - 1

Basically, i just received an iphone 6s from my friend as she was completely locked out of it and had to get a new one. It is not connected to itunes, and the password has been forgotten. Also, find my iphone is not installed. So there's no way to get into it. I can also not connect it to a computer as my laptop is currently broken. Is there any way to factory reset it?

How much is my iPhone 6s Plus worth?

It has a broken camera on the back (due to water damage) and scratches on the top left edge (the only scratches)

I would like to know because I'm planning on selling it.