Will my iphone 3G work if......

[relppadivad]

I am an ATT customer, I just recently was given an iphone 3g by my buddy and I have a question....will I be able to make phone calls and send text messages normally with my old sim card in the iphone without the data package and everything? I'm assuming it will, but I just wont be able to use the internet or anything, but I could be wrong, can anybody shed some light on this for me?

[z3r01]

As soon S u insert your sime, it works automatically but, Att will also kno that it's an iPhone 3G and give you the data plan automatically so be careful

[relppadivad]

what a gyp, you cant just disable safari and everything that eats data through an unlock/jailbreak or something?

[z3r01]

It's all in the imei.

[relppadivad]

all in the what? sorry, im new

[Bluemoldycheeze88]

The IMEI (International Mobile Equipment Identity) is a unique 17 or 15 digit code used to identify an individual mobile station to a GSM or UMTS network.

basically the serial number on the phone