Can I change my blackberry SIM card into an iPhone 4?

I'm on a contract on a blackberry 9790 for another 16 months and I was wondering whether I could use my contract SIM card inside my blackberry and use it in the iPhone 4 by cutting it into a micro sim? I was wondering whether it would still work like normal on the iPhone 4, Thank you

You can't cut a SIM into a micro SIM any more than you can cut a Cadillac into an Aveo. You take the iphone to an ATT store (or whateveR) and they will give you a new SIM for free and activate it.

I just changed from an a Samsung galaxy ace smartphone to an Iphone 4. When I realised that i needed a micro sim all I had to do was call my mobile phone company and ask them to send me a micro sim card (I'm with three and they did it for free because it was the first time i asked, it came the day after i called them!). After it arrived all I needed to do was to activate it online and then about halfway though the next day it worked fine and the old simcard was deactivated.

Its dead easy and only takes a couple of days. Its also cheaper than cutting your card and is guaranteed to work!

It needs a micro sim

Its is possible to cut a standard sim into a micro sim my partner had to do it when he got his new phone. You just need to get the right size need to be careful. My partner did it using another micro sim to get the measurments good luck