Why is my iPhone randomly deleting all my messages?

I have an iPhone 5 and I've had it for a year and every once in a while it will do this weird thing where it's glitchy and will freeze if I try to slide to unlock my lock screen or if I try to scroll down it will start like scrolling itself down over and over. THEN it will go to my text messages and I'll go and click to reply to someone and the delete bad slides across and before I can even tap to make it go away it deletes my messages! I'm so angry and I was wondering if there's any way I can get these texts back?! My phone is up to date and I havnt backed it up since I got it… Any advice?

Why does my Iphone 5S (Verizon) screen just randomly turn black?

So I just got my screen replaced Saturday and it was working fine until now, my screen will just randomly turn black even though the phone is still on. I've tried resetting the phone and pushing the home and lock button but it still keeps happening. What should I do?

How to download apps on my iPhone?

I got iPhone 4S but I'm unable to install any app or a game. When I try to do so, they ask for the review of apple Id… I have created apple ID but in review, they ask for credit card. I don't have any thing like that I'm also unable to download free apps.

Can you sue if you are not paid the money you are owed?

Firstly, there's no contract whatsoever so my initial thought is that i'm screwed. Basically, my phone got stolen and the person who bought it contacted me because she couldn't use it because the phone company told her it was stolen and inactive. So she was going to give me back the phone OR I would sell it to her for a low price of $250 (iphone 5). She went on vacation and to be safe I made her pay $100 as a deposit and she would pay the rest when she got back. When she got back I messaged her because she made no efforts in messaging me and she told me she promised she would pay me the rest when she had the money, HOWEVER THE PHONE GOT STOLEN IN MEXICO ON VACATION, so my assumption is that she does not want to pay the rest. The only proof I have are text messages talking about the payments she would give me. Can I file a lawsuit or no? I just feel so wronged, she keeps ignoring me now.

How to clear an IMEI on an at&t iphone?

I have an iPhone 5c. My aunt does too. She was cleaning her house and found a couple of her old iPhones and gave them to me since she didn't want them so now I have a 3gs and a 4s. I want to resell them since I have no use for them but I know I have to clean the imei (I'm pretty sure it's that since verizon -which I have- uses esn). How would I do this?

Added (1). Can I take it to at&t to have it cleared or anything?

Can I buy a used iPhone and activate it?

I lost my iPhone 5s last weekend and it's off so I can't track it using find my iPhone. My friend has an old iPhone that he's willing to give me but how does that work? Can i just activate it using my account and everything?

Verizon iphone 4 to straight talk?

I bought a Verizon iphone 4 and I'm wanting to make it into a straight talk phone. The "bring your own program" says my iphone IS compatible and I have already talked to straight talk reps, probably three times. I was told the first time it would only take a "few hours" to get my already existing plan ported/transferred to my new iphone. Well I called back and was told it will take 24 hours. So this crap has gone from a "few hours to now 24 hours".called again. This time they tell me it will take a couple of days.WHAT.THE.****?! I don't want to wait around for 2 days for my stuff to "maybe" work. How long does it take to port an already pre-existing number/plan to a new iphone? Are there any ways to resolve this crap?

I have a disabled IPhone 3GS?

I forgot the password to my old iphone, it's now disabled, I don't know the password I have no money to take it into a shop so need to do it at home, when I connect it to iTunes what do I do from there?