Why are my songs greyed out on my iPhone 4s?

I have an iPhone 4s and I had it plugged into my computer I have songs I don't listen to so I deleted them all. I went on my phone and All THE SONGS were on my phone but greyed out! I tried to delete them but it didn't work! I don't know what to do and i'm not really liking iTunes anymore!

YouTube on my iPhone and IPod won't let me watch certain videos?

At random times I try to watch a video like a lyrics video. Today I was gonna watch chasing the sun by the wanted and YouTube said "you do not have permission to access the required resource" I have no restrictions keeping me from watching anything and it just recently started doing that.

How to download stuff from installous 5 it does nt work?

I've got an iPhone 4s 5.0.1 jailbroken got cydia installous 5 the latest anyways I've got everything but when it comes to download stuff like games, apps etc. It just doesn't go or maybe I don't know how to do it so that's why I'm here that some one should Please Help ME!

Is I bad if my iPhone charges really fast?

I know it's a silly question because it's obviously a good thing if it charges fast, but every minute or so, the percentage of the battery increases by 2, for example, if the battery is at 30% at 2:00, then at 2:01 it would be 32%, and so on. I want to know if this directly correlates with bad battery life, or if it was made to charge fast. Btw, I have a iPhone 4s, 16gb on iOS 5.1.1

Unable to upload pics to Craigslist app?

I have a iPhone 3GS and I've downloaded 3 craigslist apps. I have previously been able to upload pictures from my iPhone to Craigslist through one of the apps. Just recently it started not even giving me the option to upload pictures. I have an existing add I posted before this happened and when I go to edit it, it doesn't show the pictures on it and when I hit post it's unable to do it. I've tried with each app.

My iPhone 3GS lock button has sunk in?

If I get a new back housing for my iPhone will this fix the problem? The button still works. Also if I do need back housing do you know any tutorials showing you how to change it?

When someone gives you something, is it yours legally?

Basically, my (now ex) boyfriend gave me 2 phones while we were together. One was because i lost one my phones and the other one was a gift. He never mentioned that i would have to give either of them back if and when we broke up. But now we have he is demanding i give them back. He has a perfectly good working IPhone 4S.

So do i have to give them back or are they legally mine? Because neither me or my dad have money to buy me a new phone at the moment.