Sherif Hashim, the guy who found the exploit to unlock 05.12.01 / 05.13.04 baseband on iPhones running iOS 4 is back with a video, which shows us how to activate iPhone 4, iPhone 3GS and iPhone 3G without the original SIM card.
You can use any SIM card you like ! iPhone 4 users though will have to cut SIM to micro-SIM card size before using it.
Here is the description:
instead of telling everyone who hasn’t got the original sim that activation of the iphone is easy using a phonebook sim card, i made this video to show u all how it works , Use any phonebook sim card, they are there in radioshak, mobile phone shops or any mobile tech moles , any phone book simcard will do the trick, no need for programmable sims, all those phonebook sims used to save ur contacts and transfer them have a universal ICCIDs preprogrammed so they all work
and here is the how-to video in action: