Why can't I sync my music after iSO 7 update?

Ok so I updated my iPhone to iSO 7 and now I can't sync any music to my iPhone. I backed it up thankfully but now it won't sync just the music to Tunes. Everything else syncs. I have already updated Tunes to it's newest version 11.1 and even shut down and restart my phone to make sure it wasn't me. Would this mean I have to wait for the next iSO update from Apple? Please share your thoughts below.

How to delete everything from iphone 4?

How should i delete everything from my iphone 4 permenantly? I might sell it so i want to delete each and every single from my cell. Even the recently used contacts and numbers in text messages. There's no such option so how should i do it?
Do i have to go through sync process? If so then how? Cuz i have no idea about it. Or do i have to renew my phone software? How? Won't it cause any damage? Also, i might not cell my cell so still i want EVERYTHING deleted apart from my photos. Then what should o do? Pleae explaine me in very easy clear words
Thankl you

Should I buy an i-pad? Or is there any Better technology?

I have a smartphone and anipod latest version of apple.

but i'm thinking of buying something with a bigger screen and very easy to carry around like take it to my classroom and somewhere i go…

So should i just buy an iphone? But isn't it a waste coz i heard that samsung galaxy or whatever is cheaper and better? I don't know what's your experience or opinion on this? I think many people but iphone out of peer pressure which is pretty stupid.

Or should i buy an I-pad? Ipad is better i think coz you don't have to pay every month lol or should i just buy a small apple laptop where i can even do my homework? (Type, print)

i already have two laptops btw, both Big.

So yah Enlighten me from your technology knowledge and experience and some personal advice?

Thank you:3

Added (1). Wow i don't know who to choose as the BA:@ lol

10 GB of Other/Document and Data on my iPhone storage?

There's 10 GB of this Other Data taking up all the space on my phone, leaving me with very little room to keep photos, music and apps.
I have called up apple to help me with this problem but they haven't helped.
So I need to know, the things I can delete to get rid of this, or whether it may be a malfunction in my phone, as I do have 2500 photos on my phone?

Added (1). The problem is that I don't know what "other" is and i need to know what it is so I can delete it

Did you find the iPhone 5S innovative at all?

Apple calls it the most advanced smartphone, but what's so advanced about it? HTC One gives it a run for its money with actual innovation. I have to upgrade my phone and I have to decided between these two. Which one should I go for?

How to convert a M4A to M4R on windows 8?

So, I know how to make iPhone ringtones, but I'm not on Windows 8, and can't find out how to rename the extension? I right click it, and in the properties I can see it's an m4a file. If I right click and rename it, I can only give it another name, not another file type.
What do I do?

Where is reduce motion on accessablity?

I have iPhone 4 and it says I will have parallax, but I don't. And I'm trying to find reduce motion, but I can't find that either. I want to try the parallax effect even though people are trying to turn it off. I see it everywhere, "how to turn off parallax" so I was like "if it can teach me to turn it off, it's also the same way I can turn it on".
General > Accessablities
There's no "reduce motion" I can't find it.