IPhone 5C won't connect without Wi-Fi?

For some reason, when I'm on LTE or 3G, my iPhone 5C will not connect to any of my apps or any web pages, and I can't understand why. I've tried everything. I've checked all of my settings. My cellular data is on. I've tried a hard reset by pressing the home and power buttons at the same time for 10 seconds. I've tried resetting my phone to its default factory settings. I've even checked my data plan with my phone carrier to see if it had been locked for going over for the month. I've barely used any data, so that's not possible. The only thing I haven't done is a full restore of the entire phone. I'm trying to avoid that if I can. Everything works on Wi-Fi, but off of it, everything from Facebook to iMessage does not connect.

Does anyone know what could be the reason for this? I'm wondering if it's the new iOS update, since I don't think this was happening before I downloaded it.

Is iTunes the problem or my iPhone?

I got an iPhone 5c in December. Everytime I plugged it into iTunes to sync music it worked perfectly. Recently it hasn't. I will plug it in and it's begin to charge but not show up on iTunes. When it does it somehow disconnects from iTunes. It'd say that my computer doesn't recognize the device or that it could perform faster or to try again. I can't add music to my phone since it'll disconnect the minute it'll start syncing. Any help?

IPhone: Google maps or default apple maps?

I personally like the default maps, at least the OS 7 version. (like everyone else who had a brain, I hated the OS 6 version) Which one do you guys like more? Which is more popular now?

If I buy an iPhone off of craigslist can I get a nano-sim at walmart?

Being the impatient college student that I'm, I'm trying to buy an iPhone 5s off of craigslist. Naturally, the Tmobile store is closed; can I get the correct nano-sim from walmart to activate it?

I'm currently under contract at Tmobile so I'm not sure if they'd have to do it there or not.

I want to record ringtones onto my iPhone?

Okay, i've wanted to have the Metal Gear Solid CODEC ring tone thingy for my phone(iPhone 3G) for some time now, and i was wondering what i should do, like if there any sites i should go to, to send the tone to my phone, or is there an app that can do that
and when i mean record, i mean record… Like you record little clips with the camera…
its a stupid idea i have, i know what you guys think. Sorry if i waste your time

Apple iPhone icloud account?

So recently I changed my Apple ID email, then my password. When I looked at the icloud account on my iPhone and iPad it still had the old Apple ID, so I deleted the account on my iPad and made a new one using my new Apple ID, then I went to do the same on my iPhone but it requires a password, an neither my old id password nor my new one are working so I can't delete the account. How can I fix this?

My iPhone 5 is not recognized by my computer running Windows Vista?

I mistakenly (stupidly) disabled some startup programs to speed up my computer and now my iPhone doesn't get recognized when I plug it into the USB port.

I've tried restoring the computer to before this all happened, enabling the startup programs, uninstalling iTunes/reinstalling iTunes, rebooting, etc etc etc.

I can't get the computer to recognize the iPhone. When I go to the Device Manager, all I get under USB Ports is "Unknown Device". It's not showing up under Portable Devices the way it should.

Help! I want to sync my iPhone with my music on my computer and can't!