User manual for Iphone4s Unlock SIM
1. Power on the Iphone4s =>Settings then Plug the Sim Tray with cards, normal micro Sim on the upper side.
2. Wait till the phone symbol turned from light green to green
3. Enter the phone setting menu to check the STK applications menu like below
Click "Country & Operators" then select your operator (default operator is AT&T)
for example, if your phone service provider is AT&T, then you choose MODE 1 AT&T.
Your phone service provider will appear on the top of the screen. (See picture below).
Then click the return (the left arrow on top ) back to the previous screen (SIM Applications)
a. Click the first one "ENTER 112 Mode" and back to the main menu.
b. Wait for the Message Window to promt then click "Accept". Wait for 3-5 seconds then dial 112.
After connected, do not hang up. Slowly take the SIM card off the iPhone, then push the SIM
cards back to the iPhone again. Wait for the iPhone to hang up itself or hang up after you see
the "no service" on top left screen.
c. Wait for the searching your phone service provider. If the top left shows the message "No Service",
keep waiting until the phone service provider's name show up. Then the manual setup is completed.
You can use your iPhone now. (If you turn off your iPhone, You would need to doo all above steps again).