What is Gevey SIM?
Gevey SIM - It is actually not a sim. It is a sim interposer.
An interposer is an electrical interface that directs the connection from one socket to another.
The purpose of a sim interposer in this case is tore-route a connection to a different connection which can then unlock the iphone 4.
HOW TO USE:
(You need to dial 112 ONCE when first to use gevey supreme, no need to do it again when reboot the iPhone 4):
Step1. Turn off your iPhone 4 and insert your Sim card and GEVEY Supreme Sim together with the metal Sim tray provided.
Step2. Turn on your iPhone 4 and wait for the SIM WELCOME menu to show and then select "accept"
Step3. At the beginning a "no service" message will show on your iPhone 4, DON'T do anything and wait until you see one signal bar appears on the top left corner.
Step4. After you see the signal bar dial "112" and hang up within 2 seconds.
Step5. Turn on the Airplane mode and then turn off right away. Your iPhone 4 will show "SIM Failure" and then "No SIM Card Installed".
Step6. Until the "No SIM Card Installed" messages shows up turn on the Airplane mode again and turn it off right away again. The "SIM Failure" messages will show and the signal will show up after a few seconds.
1. After all the steps above, if there is still no signal, power off your iPhone 4, switch it back on and repeat all the steps from the beginning.
2. To use 3G network, you need turn on "data roaming" in the network menu.
3. You can do a language selection for the Welcome message at the STK menu.
How to enable GPRS:
1. Dia *112
2. Shut down and re boot the iPhone 4, then everything would goes fine.