Flashed iphone to cricket mms and internet not working?

Ok so my friend got his iphone flashed with cricket. But then he turned it off and he still had texting and calling but his mms doesn't work or his internet. I have cydia on my iphone and when he was looking through my phone he said oh thats the app i need… So i told him i would put it in his phone. My question is just by downloading cydia into his phone will he have mms and internet again or what else do i have to download and also will this erase his calls and texting cause i don't want to mess his phone even more?

How to unlock an iPhone without a passcode?

I need to get into an iPhone with a four differ passcode on it. How can I guess what it would be? If it makes a difference, it's a 14 year old boys. Don't worry, I'm not going to do anything mischievous or bad, I'm just wondering how to get into it.

Why I can't I find a certain app in the app store anymore?

About a year ago I bought a free application for my iPod touch called Pokedex Pro. The Icon is of a slightly tilted 2-D Pokéball. I got an iPhone and I want that app but I've been looking for months in the AppStore but I can't find it anywhere. I tried searching by the exact name, typing in "Pokemon," looking through past downloads, and syncing the apps from my iPod to my iPhone. I can't do the last one and I always see all the apps I've bought on my iPod in my account download history but it's not there. Any tips to find it?

IPhone 4s only sends pics to other iPhones that have iMessage?

I can't send pictures to anyone who doesn't have iMessage and it makes me mad because I try to send my dad pictures of like my grades from school but they won't send. My phone is Jailbroken but I don't think that's the problem. Don't tell me to go to settings then his MMS on or whatever it already is and don't tell me to reset the data or whatever. Doesn't work either. I don't want to spend money to get technical support when I don't think it will even work. The guy said if I take the jailbreak off it probably won't even fix it.

What happens when you change the color of your iPhone?

I recently changed my iPhone color from white to black because of some reasons. Last week I have dropped my iPhone and it cracked the front screen. My back plate is plastic and I'm not happy with the results I had when I got it changed. I have Verizons extended warranty for it and I never used it. Do you think they could replace it to the same white one I had before? I really need your answers please help!

Why won't my itunes allow me to update my iPhone?

My iTunes won't let me update the latest version of iOS on my iPhone because it says I have to update my iTunes on my computer. So I updated my iTunes and went to update my phone again and it still said I had to update my iTunes and I did it again but still no luck. What could I be doing wrong?

How to get gyroscope for iphone 3G?

So i wanted these apps but when i pressed install, it said you needed a gyroscope, which apparently i don't have… I don't kno wut a gyroscope is but how do i get it? And does it cost any money?