How to sync iPhone without deleting everything?

I have things on my iPhone 4S (music mainly) that I bought from my phone and don't show up on my computer (a mac). When I tried to sync my phone, the only options I had were to delete what I had on my phone and sync it with what is on my computer, or to keep what I have on my phone on my phone, but not add anything else. How do I get it so that I can have the things that I bought on my phone plus what I have on my computer on my phone?

Does the network O2 have 4G?

I have an iPhone 5 being delivered to me on the network O2 and I was just wondering does O2 have 4G mobile broadband!

Can somone from jersey text/call someone from london?

Okay, So I'm from jersey channel islands and my really good mate is from London/Hemel Hempstead.
I really want to text him, so that I don't have to constantly go on Skype and Facebook. I get unlimited texts and around 600minutes of calling time, I don't know if that'll change anything. But If I text him, will he get it? Or will it cost a lot of money? Because I don't want to spend loads of money since we can talk online… (I have an Iphone, not sure what phone he's got)
So Will the distance between us cause stuff with the texts?

I lost my iphone and i need details?

Well, i did a stupid thing and left my iphone 4 on the bus. My phone has been taken according to my find my iphone app. I loacted it and it was somewhere in east london and i live in essex it didn't give me the full address just the street. So i want to know can the iphone app give you the full address? And because i've put my iphone on lost mode, can they unlock my phone in any other way?

Swapping phones on virgin mobile (iPhone 4)?

I had an lg optimus v for vgmbl and just bought the iphone 4 for vgnmbl. Best buy activated the phone for me and everything works except the 3g. The 3g occasionally pops up but most of the time its a "o" symbol when it should be the other way around. I just noticed that 3g still works on my old optimus. Could it be that the signal is still going to my old phone instead of my iPhone 4?

Samsung GS4 vs iPhone 5 (s)?

I have an upgrade coming in June and I want to pick the iPhone 5s or the Galaxy s4.
Little background:
I own a MacBook Pro, ipad 4, and iPhone 5 currently.
The only android phone I've had was the Samsung infuse 4g, which I deeply hated. It had features through the roof, much more than the iPhone 4 (currently iPhone at the time), but it was laggy and glitchy and super unreliable. I blame it on bad hardware/software compatibility. Sure the specs were better, but anyone who had both an iPhone 4 and the infuse would see how much smoother the iPhone runs.

You may think its ridiculous to keep getting a new phone everytime they come out, so here's my reasoning: everytime a new iPhone comes out, I sell my old one for around $300-$400 on Craigslist, buy the new one for $200-$250, and bank the extra. If I wait a few years, the value of my phone has dropped too low to pay for the new one.

Which brings up how well iPhone hold their value: my infuse 4g was replaces by the Galaxy SIII within months, and my infuse was worth little more than a paperweight. I sold my 4s the day before the 5 came out and got $300.

Okay, so the real question: S4 vs. 5S?

Is android still pretty buggy?
Is Samsung releasing features that aren't ready for release?
I know the specs for the s4 are much better, but how is it then that the iPhone just runs so much smoother? Of course now I'm referring to the sIII and iPhone 5.
I love messing with my phones features, I have even jail broken them in and off, but I know that when it comes down to it, I will always be able to rely on the high quality of an iPhone.
I can always pick it up and know it'll work with out question. My infuse was so unreliable, sometimes if it bumped stuff wrong it just shut off, Wi-Fi constantly disconnected, ans Samsung was no help in resolving these issues.

Last comment: I love features that are 1) developed to work without flaws and 2) actually useful.

I don't need my phone to show me live tweets the second I open it. ( my generation is far too disappointing for this) and I sure as hell don't need to video chat with the front and back camera at the same time, COME ON!

Can i update my iphone 4 to 6.1.3 after its been unlock?

It seems that i could bc i've been using an iphone 4 on T-mobile network and it currently has the OS 6.1.3. But i'm not sure how it was unlocked bc it was given to me like this. I just came in possession with another iphone 4 but its locked from AT&T with iOS 6.1.3. Been trying to unlock it but apparently there isn't a hack for the new OS yet. So anyway around that? Also, for the future.once the phone is unlocked. I can still update to the latest OS?

What's the best way for me to take pictures of smaller items i want to sell on Ebay?

I'm only using a small digital compact, what is the best settings for this task? What type of background is best? What is the best lighting, natural sunlight or a Halogen lamp? Ii sometimes use my iphone as I can just transfer the pics directly on to the Iphone ebay app, though the picture even though of passable quality is a touch too small.