My iMessage Unregistered

I went on my iMessage and it said "iMessage for iPod iPad iPhone and Mac, get started." I typed in my apple Id to register again for iMessage. Out of nowhere it unregistered. When I clicked login and typed in my apple id it just went back to the login screen again. I was previously using iMessage so I don't know why it did this.

IPhone 4S no sound and flickering screen?

I have an iPhone 4S iOS 6 and yesterday by accident I left my iPhone for about 20 mins on the top of a box that has some water, I only noticed about 10 minutes after it got wet that there was water because my whatsapp sounded weird and I realised my case was wet, the screen was fine, and the sound was just very low and crackled but now after a night in rice the screen flickers on higher brightness and the sound doesn't work at all the buttons don't work, headphones work tho and my ringtone does but music/YouTube/text etc don't work, Help Please.

What is the best non-iPhone smart phone?

I have an iPhone and I love it, but no matter what the service, you have to pay a ridiculous amount monthly. So I was wondering if anyone loved their smart phone and what service they have and about how much they pay a month for texting and data. It would be really helpful.

How to unlock Sprint iPhone and put on T-mobile network?

I have the Galaxy S2 for T-mobile, and an iPhone that used to be my dads for Sprint. I know its illegal to swap phones like this unless you get the carriers approval, so how do i that without making this difficult? I know T-mobile is weird about this stuff but if they don't do it I'm leaving their service cause I don't really like it and this would top it all off. Instructions please.

Added (1). I've seen people on youtube do it. I was wondering if the sim card I put into the iPhone can it be my current phones sim card? Is that what I'm supposed to do?

IPhone 4S speakers sound weird?

So my phone was in my back pocket while is was POURING rain outside! I felt like I was swimming! When I got in the car I dried my iPhone with a towel and an hour later once I got home I put it in rice to try to soak anything else out. Now when ever I try to play music or watch Netflix, the sound is terrible! It sounds broken, crackly and it's very hard to hear.