Incorrect APN settings

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Level 1

10 points

Incorrect APN settings

I have an iPhone 7 with a UK O2 contract and on a trip to Japan I bought a data SIM to use while I was there. Since then, when the phone is rebooted, the APN settings revert to the Japanese APN settings. This causes no issues unless I am, say, in Europe when on trying to connect to the net an error telling me I am not subscribed to a data network. This can be overcome by manually re-entering the correct O2 APN settings. There is no profile listed to delete, but if I click ‘reset settings’ in the mobile data screen the . jp APN settings reappear. This would seem to indicate there is a hidden profile somewhere.

Any suggestions?

iPhone 7, 12

Posted on Feb 17, 2019 6:20 AM

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Answer 1

Feb 17, 2019 6:28 AM in response to mikeyyn

Reset your Network Settings. Tap Settings > General > Reset> Reset Network Settings. This also resets Wi-Fi networksand passwords, cellular settings, and VPN and APN settings that you've used before.

If your iPhone, iPad, or iPod touch won't connect to a Wi-Fi network ...

https://support.apple.com/en-us/HT204051

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Answer 2

iW00

Level 6

8,542 points

Feb 17, 2019 8:27 AM in response to mikeyyn

Have you tried to update Carrier Settings? Update your carrier settings on your iPhone or iPad - Apple Support

Other than that, backup your device first, then go through process of restoring it from that backup.

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Answer 3

mikeyyn Author

Level 1

10 points

Feb 17, 2019 1:50 PM in response to iW00

Carrier settings, see previous answer.

Surely, restoring from a backup will also restore the incorrect settings.

Searching for answers more widely resulted in this: https://discussions.apple.com/thread/2470873?answerId=11737052022&page=3. But it seems awfully complicated and it’s quite an old solution. One would have thought that any bugs would have been sorted by now.

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Answer 4

mikeyyn Author

Level 1

10 points

Feb 17, 2019 6:58 AM in response to SravanKrA

Nope, doesn’t work. This merely reloads the biglobe.jp APN. I now have to manually replace the correct APN.

Like I said, there seems to be a persistent profile somewhere that reloads the wrong settings.

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Answer 5

mikeyyn Author

Level 1

10 points

Feb 18, 2019 11:24 AM in response to iW00

Hi, tried restoring and the same issue with the APN settings.

Phone was bought unlocked direct from Apple.

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Answer 6

iW00

Level 6

8,542 points

Feb 18, 2019 10:00 AM in response to mikeyyn

Surely, restoring from a backup will also restore the incorrect settings.

You won't find out until you try.

Note that when you buy iPhone locked to specific carrier, when then carrier unlocks the device, Apple instructions in document How to unlock your iPhone for use with a different carrier - Apple Support are as follow:

Use these steps to finish unlocking your iPhone:

Back up your iPhone.

After you make a backup, erase your iPhone.

Restore your iPhone from the backup you just made.

I'm not saying it will work as I cannot be sure. But you can wait for others to post other instructions or follow offered steps and who knows, maybe resolve your issue with 1 hour or less (I think).

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Incorrect APN settings

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