How much is 500mb data of internet?

Ok i have no idea what '500mb' means, i'm thinking about getting the iphone 5 and what it says is '500MB data' and '2 GB Wi-Fi with BT Openzone
Anytime Same network'

does this mean i can't connect to Wi-Fi?
please help me!
if i can still connect to Wi-Fi how much do you think '500MB'is? Could i still use facebook?
thats pretty much all i use on mobile internet if i'm not connected to Wi-Fi.

T Mobile LTE in Toms River, NJ?

Specifically to those with LTE phones on tmobile (iPhone 5), did anyone just connect to a LTE tower not too long ago, I was walking out if a building and I spotted the LTE right next to the "T Mobile" thing at the top right on my iPhone 5, before I could run a speed test I lost connection, any reason? Was this just a glitch? I'm in the Toms river area, I was in the 08753 area code when I spotted it.

Can I use my Iphone as a phone again?

Ok long story short,
I was living in another country and I asked a friend of mine if he could unlock my old Iphone so I could use it in the country that I was living in. Well the guy wasn't able to unlock the Iphone and some stuff happened so it could only be used as a touch Ipod.
Well I'm going to be moving back to the states will I be able to use my Iphone when I get back to the States if I put in my US sim card or is my Iphone not able to be used as a phone anymore?

How em I not able to use the USB Ports in the back of my Computer?

I'm having trouble being able to use my additional usb ports in the back of my AMD FX(tm) 4130 Quad Core Proccessor from iBUYPOWER, i'm trying to use these front 2 usb ports free for my ipod or iphone or just any other devices I may connect to and use the back ones for my keyboard/mouse. How could I enable em to work properly?

Confusion about unlocked iPhone?

I'm looking at buying an iPhone on ebay and it doesn't specify whether or not it's "unlocked." I'm still a little confused as to what it means (that it would be unlocked) and what I would need to do to get it unlocked?

Your connection does not support online multiplayer?

I've recently downloaded cod-black ops zombies on my iphone and ipad but there seems to be a problem with multiplayer. I googled everything and tried even port forwarding! Nothing! Can anyone help with a fully-detailed guide?

Thanks

Added (1). If i change my modem will it be ok?

How much is the IPhone 5 really?

I'm trying to buy the IPhone 5 from AT&T and on the website it says it is $199 but on other sites such as Apple they say it is $600. What is the actual price and should I wait till the IPhone 5s comes out so that the IPhone 5 is cheaper?