Cellular Update Failed

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Level 1

21 points

Cellular Update Failed

I have an IPhone 7, and upon restarting my phone, I’m getting the “Cellular Update Failed” message with the “No Service” icon in the upper left corner where your reception is normally displayed. When I attempt to open my “Cellular” tab in the settings application, it says only “Error” and won’t show me any options to attempt to cycle the cell network on/off to potentially reset. I’ve attempted cycling airplane mode, restarting the phone, clearing the phone, resetting network settings, DFE restoring the phone and nothing has fixed the issue. I have the most recent software and carrier update. If I remove the SIM card, not only does it not fix the issue, it doesn’t even say “NO SIM” as it’s supposed to when the SIM card is removed.

There are apparently iPhone 7’s which qualify for a repair for this exact issue, but my model (A1778) does not qualify.

What do I need to do to fix this issue?

iPhone 7, iOS 13

Posted on Sep 11, 2020 5:12 PM

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Answer 1

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sberman

Level 10

264,207 points

Sep 11, 2020 5:33 PM in response to Shawn_K07

Shawn_K07 wrote:

There are apparently iPhone 7’s which qualify for a repair for this exact issue, but my model (A1778) does not qualify.

That is correct. Your model iPhone 7 is the AT&T/T-Mobile/Global model.

If you see No Service or Searching on your iPhone or iPad - Apple Support

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Answer 2

Sep 12, 2020 12:57 PM in response to Shawn_K07

I’ve seen several posts about this issue today (not just iPhone 7’s) I suspect AT&T released a carrier settings update that broke stuff.

Try backing up your phone, then restoring it using iTunes on your computer (Finder on a Mac with Catalina).

One thing to check, just for troubleshooting purposes. Go to Settings/General/About. First, wait about 30 seconds and see if you get an update notification. Whether you do or not, next scroll down to Modem Firmware and see if there is a version listed. If there is not the baseband (modem) firmware is corrupted and needs to be restored, as above.

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