Is Virus possibilities for Iphone (Mac OS)?

Guys recently I've purchased Iphone. So please let me confirm Whether by the usage of WI-FI does virus possibilities are there? Or Iphone Mac Operating System is free from Virus.
If there are virus possibilities what steps do i need to follow? Does it requires any sort of Anti Virus Protection?

Iphone password not working

So I was playing around with settings on my Iphone, and while trying to access main security settings where I have to put in my code (4 digit) it said I was wrong. So I locked phone and tried to go back in and now it won't let me back in! I'm either losing my mind, or for some reason my Iphone (4) is malfunctioning. Has this ever happened to anyone? I googled this, but can only find the solution of reset/restoring an Iphone which wipes all your data. Not something I want to do. What should I do? Wait till morning and call Apple? Or is there another, more immediate solution to this problem. Please help! Why would my phone do this?

Added (1). I work in a business where my contacts are absolutely imperative to conducting business. I can't erase my data. Would Apple be able to open the phone without a restore?

And secondly, I never reset the password. Why would this happen? Am I paranoid to think someone could have hacked or something remotely to reset this? Totally bizarre…

Added (2). Nevermind. The thing just erased itself. Trying to restore from ICloud… I guess my question now is WHY did this happen. Freaks me out. Just a malfunction or something/someone tampering with my phone?

How to change your email address of your iphone 4s?

I seem to get a lot of junk mail on my SMS, and i was wondering if i could change my email address so that they stop coming. I want to change the email address- example@i.softbank.com, and not Gmail, Hotmail, etc.

Iphone 4s brightness problem?

I was adjusting my brightness and I noticed half way through the bar the screen was completly black and I showed my friend and he hit the lock button and now I can't operate my phone.
Any solutions?

Penalty of a jailbroken iphone with apple? - 1

My jailbroken iphone is broken and i need to take it to the apple store. I know that if apple finds out your phone is jailbroken, it makes your warranty void. If i choose to upgrade my broken iphone 3g to a 3gs will they still let me? I have the upgrade available but i just don't know if they will alow it with a jailbroken iphone. Also, does anyone know the price of upgrading from an iphone 3g to a 3gs?

Added (1). The lock button is broken and i tried to restore it but it is stuck on the logo screen. I have tried EVERYTHING

Why won't my iphone 4 charge via laptop?

I'm using a Gateway NV53 and there's four USP ports and none of them register that the iphone is recognized. I have gone to Apple to resolve this issue but to no avail. My USB cord is brand new and it works on my other laptop. Any computer whiz in the house?