Wet iphone 5s, touchscreen isn't working?

Ok so my iphone 5s got wet, I dried it but didn't turn it off immediately since it was working fine. After 15 minutes the touchscreen was acting weird so i turned it off. I left it in a bag of rice, the next day i turned it on and it turned on right but the touchscreen wasn't working it wouldn't let me turn it back off since the "slide to turn off" wasn't working. I managed to turn it off and left it in a bag of rice again. Will it still work if i leave it in longer, or is this permanent damage?

Is $300 too much for a used iPhone 4S 16 GB?

I just bought a used iPhone 4S 16 GB. It is in excellent condition, and I'm happy with the phone. Did I pay too much though, or is this what used iPhones go for?

Added (1). I saw the Verizon, Sprint, AT&T, and Verizon ones were going for $250. I'm going with Metro PCS, and they told me I had to get a T-Mobile version, or I would get stuck with 2G speeds.

Added (2). I saw the Verizon, Sprint, AT&T, and Verizon ones were going for $250. I'm going with Metro PCS, and they told me I had to get a T-Mobile version, or I would get stuck with 2G speeds.

Added (3). Sorry for the double post. I only clicked the button once, and it posted twice.

Should i buy an iphone from ebay or tmobile?

I'm planning to get an iphone 5s 16gb this weekend but I don't know if i should buy it off Ebay and save about $100 or pay the full price at T-mobile. I'm afraid that I will get scammed by the seller on ebay but i also would like to save $100. I also want it brand new because i love to keep things new and in perfect condition but the guy on Ebay has his box opened (although the front and back protecters are still on). What do you guys recommend?

My iphone 4 keeps randomly turning off?

This started 2 days ago at the same exact time. I haven't dropped it, nor shaken it in any violent manners. It will turn off when i'm using it, or when i take it out of my pocket, i notice its off. When i hold the powerbutton, it won't turn on. When i hold the power volume plus home button, still nothing. Sometimes itd turn on and just show the apple symbol, then turn back off. If i hit it, itd turn on, and stay on for the rest of the day. But then the next morning this happens AGAIN. Its annoying. Can i fix this? Myself, or genius bar or a kiosk etc? If i take it to apple will they charge me just to have them check what's up?

NET10 changed from 4G to 3G- WHY?

Does anyone know why Net10 has changed my service from 4G to 3G? I have an iPhone 4S and I've been using Net10 for about seven months. I have one of their SIM cards that you can put into any phone of your choice and I'm on the $50 4G unlimited monthly plan. This morning I got a notice on my iPhone that there were new carrier settings available and it asked me if I wanted to update so I did. Now my phone says it is using 3G instead of 4G when it had always been using 4G. I would really like to know why this happened and if I can change it because I'm paying for 4G service, not 3G.

Added (1). I fail to understand why you felt the need to waste your time by leaving a rude comment.