How to change youtube quality on iPhone?

I have an iPhone 4s and at some moments when I start to watch a video, it's fine at first but in the middle of the video it starts to load again and all of a sudden the quality is s**t

Dropped my iPhone in water and it won't charge?

My brothers baby put my iPhone in the toilet. I had it in rice for about a week, now it says it's fully charged but is only at 9%. I put it on 2 different chargers and it keeps saying its charged… What do i do?

Why has my O2 iPhone 4 sim not activated yet?

I traded in my blackberry for an iPhone 4 two days ago, and obviously they had to do the 'sim swap'. They told me it would take 1-24 hours to activate but it's been over two days now. I can't do it manually on the O2 website because I don't have my old phone anymore.

I need a new iPhone because my old one got wet?

I accidentally walked into my pool with my iPhone 5 in my pocket and now its sitting in a bowl of rice. If it doesn't recover I would like to know if there's a way to get another one new or used without paying extra since I'm not due for an upgrade for another year and a half. I don't have the warranty that covers water damage and I need a new iPhone 5.

Opening up a T-Mobile contract?

I'm planning on getting the iPhone 5 on T-Mobile contract, and about to open up a credit card. If I never had any credit history, will they charge me for a deposit, and if so, how much?

Can't find the FaceTime option in my setting on Iphone 4?

I can't find it in general, in "phone" and my phone is up to date to the latest IOS system
Help Please

Added (1). My phone is factory unlocked not jail broken btw

Added (2). I don't have that "facetime" option when i call someone

Using less space on my iphone for android?

I dual booted my iphone with android i was just wondering is their a way to make ios use less space for android so like make android my main os for my iphone 4 i don't like ios i'm not going to use it at all

How much data does this use?

I want to get an iPhone and I'm really big on Instagram, Twitter, YouTube etc. So I want to know how much data I should get. How much data do these apps use?