IPhone 4 Cellular data issues?

I'm trying to turn on the cellular data for apps. I've gone through settings>cellular>use cellular data for but the only thing I can enable the data for it Passbook. I can't figure out how to turn the data on for any of the apps i've gotten from the app store or iMessage or anything

My text free app isn't working?

Okay so my iPhone 4s is shutoff, and I only have Wi-Fi on at my house so I can still use the internet on my phone or text other iphones. I downloaded Text NOW, it's blue. And it said that I don't even need Wi-Fi I can text without Wi-Fi for FREE. So I was at my aunts like a week ago, and she doesn't have Wi-Fi so my phone didn't work but I remember that I had that text app so I was able to text ppl, and that was cool. So today I tried texting someone with it and it wouldn't work. I was getting lost and I really needed a way to contact someone I new, so it sucked and I kept wondering why it wasn't working. Any help?

I'm getting so freaking frustrated?

Okay so I just got my iPhone 6 from sprint and ecerytime I'm on the phone I can't access to my internet. Why?
Like I'm on the phone and the (LTE, 3G, 4G) sign comes off and once I hang up it starts working again!
Why? What do I have to do?

Got iPhone 5 Screen repaired and the screen isn't fixed?

So my dad took my screen to be fixed as it was smashed so the guy put in a new screen but it wasn't properly in so he took it back the next day and superglued it and now the middle part of the phone is able to be pushed down. Now at the top of the phone half it is in and the rest is out being held with superglue. What shall i do?

Is there an iPhone app to go to the home screen? My Home button isn't working well?

IIm afraid my home button will completely stop working soon enough, and i don't currently have money to replace it. I really only need the home function, but it would be really nice if it also had a screenshot function (because screenshots need the home + lock combo)

Added (1). Edit: If it makes any difference, my phone is an iPhone 3GS (old, lol) and has iOS 6.1.6.

Deleting songs from my iPhone library?

Hi, I have a iPhone 5c and a year ago I wemt through a phase where I loved everything Taylor swift. I now do not want them on my phone and when I hit the delete button to delete the songs it showed a little cloud icon. I'm wondering how do I get rid of the songs permanently and I do not have computer that is hooked up to my apple id.