unlocking methods do not rely on the SIM card slot unlike the hardware unlock and SIM unlock. Apple has restricted the software not to accept connections by other carriers. You only have to disable the restriction to enjoy the use of any network service provider of your choice. Here is a choice of neither of the above two. It is
1. Insert the original network provider AT&TSIM card
2. Dial 611 the AT&T customer service number and then drop the call
3. Turn on your iPhone 4S 5.1 to Airplane Mode
4. Take out the AT&T SIM card
5. Insert a new carrier’s SIM card
6. Make sure WiFi is off and tap on ‘Forget this Network’ to ensure no automatic reconnection.
7. Switch off Airplane Mode let the iPhone search for a network.
8. The Apple splash screen appearing follows this. The message ‘Activation Required’ is shown to you.
9. EDGE network will activate automatically
10. After this, wait for about 20-30 seconds then switch off the iPhone.
11. Turn on the iPhone and the same Activation Required screen will come on.
12. When you get just one signal bar, tap on‘Use Cellular Connection’ and eject the SIM card.
13. The Same ‘Activation Required’ message will appear for the second time.
14. Insert the SIM card and the iPhone will be unlocked.
1. Insert the original network provider AT&TSIM card
2. Dial 611 the AT&T customer service number and then drop the call
3. Turn on your iPhone 4S 5.1 to Airplane Mode
4. Take out the AT&T SIM card
5. Insert a new carrier’s SIM card
6. Make sure WiFi is off and tap on ‘Forget this Network’ to ensure no automatic reconnection.
7. Switch off Airplane Mode let the iPhone search for a network.
8. The Apple splash screen appearing follows this. The message ‘Activation Required’ is shown to you.
9. EDGE network will activate automatically
10. After this, wait for about 20-30 seconds then switch off the iPhone.
11. Turn on the iPhone and the same Activation Required screen will come on.
12. When you get just one signal bar, tap on‘Use Cellular Connection’ and eject the SIM card.
13. The Same ‘Activation Required’ message will appear for the second time.
14. Insert the SIM card and the iPhone will be unlocked.
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