Can a AT&T iPhone 5 c be activated with cricket wireless?

If I buy a used iPhone 5c from AT&T on amazon, would I be able to activated it to cricket wireless. I have sprint right now but the service sucks. I heard cricket is under AT&T now and cricket has cheap plans. Also how about a verizon iPhone 5c to cricket is that possible? Thank you for your time. Oh also I live in Los Angeles if that helps.

Album covers missing from iPhone?

I just got my iPhone 6 and when i first put the music on it they were all there, but when i tryed to download another song to the phone (from the computer to phone) I lost all the album covers and the song didn't even show up on my phone. Anyone else have this problem, or dose anyone know how to fix this?

IPhone text message bubble is green but I'm using Wi-Fi?

I looked online about the different color text bubbles for IPhone and all I get the difference blue= I Message where you use Wi-Fi to text and green= Text messages used from your cell phone provider

But earlier today I was texting my friend and he's at work so he had break and all he texted me and while I was texting him back I noticed my messages were green? Is that because he probably isn't connected to Wi-Fi at his work place or is it my side or what? I'm using the internet fully on my phone so I don't know what's happening?

I don't exactly know if he has Wi-Fi there but any help would be appreciated!

Added (1). He has an IPhone too.

What's the best resolution for an app to support multiple devices?

I'm developing my first cross-platform game. I need a base resolution and aspect ratio in which to develop my game. I know how to scale it to work on most devices, but need a sensible base resolution.

I could do anything from the 320x480 old iPhone display to 1080x1920, but I want my first release to be on Android and I want most devices to be able to play it.

How to take my iPhone 4s out of headphone mode?

I dropped my iPhone 4s in the bath for a second and it worked fine but 30 mins later I noticed my sound doesn't work on my iPhone, and it says it's in headphone mode and I have tried every method there's by sticking my headphones in and out and using the blow method and I have tried ringing my iPhone and I can't hear anything unless on loud speaker or in headphones. Can anyone help me with this problem?

How was an I message tracked?

I've got a add on contract to my sisters Iphone. Sent an IMessage to my girlfriend 3 weeks ago. I didn't think they were traceable but my sister plugged her iphone into the computer and somehow found my message to my girlfriend on there and could read it as well? It was only one message she could see though… We send iMessages all day. How on earth was it traced?!