HT201328: How to unlock your iPhone

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vickyfromgujarat
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Q: My unlocked iPhone 4 shows "No Service" and after airplane mode turned on and off, shows "Invalid SIM"

I recently bought two iPhone 4 phones from my colleague in USA. He unlocked these phones from AT&T. But I did not test it. However, now that I am back to India, and inserted my Indian Vodafone SIM car, the phone shows "No Service" and if turn AirPlane mode ON and then OFF, a message comes as "SIM Failure", and the top left corner shows, "Invalid SIM".

 

Now, how do I confirm whether my colleague was successfully able to unlock these phones ?

 

What are the steps to make my Indian Vodafone SIM work ?

 

Any support appreciated.

iPhone 4

Posted on Jun 8, 2013 7:14 PM

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vickyfromgujarat

Q: My unlocked iPhone 4 shows "No Service" and after airplane mode turned on and off, shows "Invalid SIM"

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  • by sterling r,

    sterling r sterling r Jun 11, 2013 6:27 AM in response to vickyfromgujarat
    Community Specialists
    Jun 11, 2013 6:27 AM in response to vickyfromgujarat

    Hello there Vicky,

     

    Here is a great article for troubleshooting the Cellular connection on your phone. From article iPhone: Troubleshooting a cellular data connection found here http://support.apple.com/kb/ts3780:

    Follow the instructions below for assistance with troubleshooting cellular data issues on your iPhone. After performing each step, please test to see if the issue is resolved.

    1. Toggle airplane mode: Tap Settings, turn airplane mode on, wait three seconds, and then turn off again.
    2. Restart your iPhone.
    3. Ensure that your software is up to date:
    4. Remove the SIM Card and reinsert it. Allow the iPhone to acquire the network again.
    5. If your SIM card has SIM PIN enabled, try toggling it off: Tap Settings > Phone > SIM PIN.
    6. Try another location. If a different location works, but the original location still does not, contact your carrier to report the issue.
    7. Reset network settings: Tap Settings > General > Reset > Reset Network Settings.
    8. Restore the iPhone as new.
    9. Contact your carrier to:
      • Verify that the iPhone is properly set up on the account with the appropriate, current data plan.
      • Verify that there are no account-related blocks.
      • Find out if there are specific error messages in the carrier logs that could help determine why the issue is occurring.

     

    In order to verify if the phones have been unlocked, the original carrier for them would have to be called.

     

    Take care,

    Sterling