Iphone 4 won't turn on - 2

I have an Iphone 4, and just recently it stopped turning on. I turned it off, and went to turn it back on but it'snot working. When I try to turn it on, it acts normally as if turning it on any other day. But it only stays on the apple logo and has been for a while. It's not dead because when i turned it off, i still has at least 70% battery left. I've tried charging it still though, and that isn't working. I've also tried holding the home button and the lock button at the same time, and the phone will turn off, and start over again with the process of staying on the apple logo. I plugged it into the computer, but it didn't work either. What should i do?

Has anyone else had this iPhone 5 problem?

I've had my iPhone 5 since November. Since then, I've been through around maybe 6 different charging cords. They'll work for a few weeks and then stop charging correctly. I've bought so many chargers I've probably paid more in chargers than I did for the actual phone. Should I call AT&T or apple or does anyone know any possible fixes?

How to remove my iphone 5 bling case?

I bought an iphone case yesterday thats all blinged out, its a hard case but its very difficult to grip anything because there's rhinestones everywhere. On the website it says "easy removal, no tools needed" but I can't seem to get it off. I've spent over an hour trying to remove it.

Which is better lifeproof or incipio atlas?

I bought the otterbox armor for my iphone 5 and although its a pretty good case I really don't like how thick it is. I wanted to get something sleeker and still gets good protection. I was looking at lifeproof and although it seems like a good case I heard reviews and seen videos that the screen protector is not all that good and responsive. I also looked at the incipio atlas and how it has a glass screen built in which is a plus but I'm not sure because it has mixed reviews.

What's wrong with my pioneer AVH 8400 deck?

I just recently got a cd-u201 cable and a lightning and 30 pin adapter to connect my iphone 5 to my deck. So I could play iPod music on it and when I plug it up to the deck it says error 02-67 which means "the iPod firmware is old" but my iPhone 5 firmware is 6.1.4 how can I fix this? And yes I know I can Bluetooth music but I don't want too

Accessory not supported by iphone?

Iv had the Auvio cable that allows me to watch tv by connecting my iphone4 to the tv for months and its always worked but 3 days ago it started saying that the accessory is not supported by iphone when i used to watch tv just fine? What could it be?