New iphone doesn't recognize my sim card?

Got my iPhone 4 yesterday. Never had one before so I was very excited but turns out it doesn't work.
I went to a store to get it activated and to get a smaller sim and it worked fine
When i got home there was i message on the screen saying that it didn't recognize my sim.
I took it out a few times, restarted the phone, connected it to itunes and restored it (wich's just giving me a blank screen), …
So now I'm back to a resetted iPhone wich is still telling me that there's no sim card and I can't remember the password for my Wi-Fi…
I'm really scared that I will have to send it back and be stuck without a phone for 10 days.

Does tmobile charge any fees for iMessage on Wi-Fi?

Hi, I have an unlocked iPhone 4 and I've had it for a few months now but I've been scared to turn on iMessage in fear that tmobile will charge me fees… Does anyone know if tmobile charges for iMessage when on Wi-Fi? I have my data turned of btw. I'd appreciate it if someone knows.

Locking the iphone 4 from using mobile network?

Is there a way to block the iphone 4 from using the carriers mobile network, I'd rather just use Wi-Fi hotspots to avoid any over usage of the plans network. I have read that the phone randomly access's the network for certain aps, so I'm wondering is there a way to prevent it from accessing the network, and I'd prefer not to jail break the phone. Any suggestions are highly appreciated!

Where can I get an Otterbox sticker?

I have an iPhone 5 and I have an otterbox. After I already had my otterbox I realized you could personalize it, I don't really want to order a completely new otterbox so I was wondering if there's some sort of adhesive sticker/skin that I could just put on the otterbox?

What do I do when I used 65% of my data on my iPhone 4

I have AT&T and I hardly use the 3G just for iMessage which is texting… Does that cost money I have unlimited and it's not Internet? I also sometimes go on twitter but only for a few mins in the car when I'm bored… I clear out the apps when I leave my house by double clicking the home button and the apps I used I will shut off with the red circle with the white line across does that shut them off or do I have to log out of everything so my data won't be used? My mom will be mad if she has to pay extra please help me

I over used 65% of my data on my iPhone 4

I have AT&T and I hardly use the 3G just for iMessage which is texting… Does that cost money I have unlimited and it's not Internet? I also sometimes go on twitter but only for a few mins in the car when I'm bored… I clear out the apps when I leave my house by double clicking the home button and the apps I used I will shut off with the red circle with the white line across does that shut them off or do I have to log out of everything so my data won't be used?