How to Activate/Use iPhone 3G and 3GS with GoPhone SIM

Activate/Use iPhone 3G and 3GS with Go Phone Prepaid SIM Card:1. Eject the SIM tray using a pointy (thin) object.2. Firmly, insert the Gophone SIM card to the SIM tray (which got ejected from the iPhone).3. Insert the SIM tray along with SIM card into the iPhone.4. You will be able to notice that a new symbol pops up in the iPhone (which symbolizes SIM Card inserted).5. Create and send a new message to your Secondary mobile.6. You will be able to observe that, your other (Secondary) mobile gets a new message (sent from the iPhone)