What would happen if I put another sim in my iphone?

I have an iPhone 5 for verizon which is unlocked for all other carriers. And it is a SIM card phone. I'm going to Mexico and I was wondering of I put a mexican SIM card in my phone will I lose all my info? Or what is the situation? Also I might switch to att and if I put an AT&T SIM card in my iphone will I lose all my contacts?

Confused on basically everything?

I have been really in need of help lately. I have wanted an iphone for such a long time, and my sister just got one and my parents said I'm not. I feel like crying since I'm not getting one. Why? Why am I being so selfish and needy? An iphone and clothes are not what is important in life. I'm starting to be jealous of my perfect friend who is pretty, nice, rich, and everyone likes her. I don't want to be jealous of anyone. I have so much and a great family, house and friends. Why don't I appreciate this? I'm trying too but it just seems like I always want more and I don't think that is what God wants. How do I appreciate everything and stop wanting more?

Aux cable with remote for car?

I was wondering if anyone knows where to get a decent aux cable with a remote that I can use in my car? Much like the ipod/iphone headphones remote? My car's cd player has an aux input however it means I can't skip songs etc without using my ipod which is incredibly distracting whilst driving (so I pretty much avoid doing it unless I can pull over which is not ideal!)
I've tried various different google searches/amazon (UK) searches but not much comes up and the few that I can find tend to have bad reviews!
Any help with this/where to buy/good brands etc would be really appreciated! Thanks!

(I've also noticed there's a few audio systems where the remote is plugged into the cigarette lighter, but sadly mine is in too much of an awkward place to use whilst driving)

How to unlock my disabled Iphone 4s?

My little brother disabled my phone while i was at school and it now says "iphone disabled connect to itunes" so i did and its updating the ios 6 or something so what do i do after that to unlock my phone? Any help appreciated

IPhone 3GS mute switch problems?

When my mute switch is on ring it works okay but when it's on silent it isn't.
When on silent it doesn't stop vibrating, it can happen anytime or if I touch it.
Should I take this back to apple (still in warranty).
This is my 2nd phone off apple warranty will that effect anything

Pros and cons of galaxy and iphone?

I'm a teen I personally don't care about gigabytes and screen size, etc, maybe like camra/ video effects and editing, stuff among those lines.

Added (1). Money is not and issue, and OH MY GOSH, i just saw that I don't really pick what group my question goes in lol

Added (2). Money is not and issue, and OH MY GOSH, i just saw that I don't really pick what group my question goes in lol

Can you completely turn off the sound on an iPhone 5?

So I just got an iPhone 5 yesterday. I know how to mute the ringer, but if I want to play a game during school I don't want the sound to be on. Is there a way to mute apps? And I don't want to do any jailbreaks or things like that

Iphone 4 replacement glass price?

I dropped my iphone 4s and the back glass is all cracked and i wanted to know how much it would be to get it repalced! I only paid 90 bucks for the phone it self.