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Cellular update failed

i’ve updated my phone to the iOS 15.4.1 and it’s got the biggest bug . Can’t receive calls or texts because it says need to update cellular. Then I click it and then it say learn more and all this crap . Why

Posted on Apr 11, 2022 3:22 AM

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2 replies

Apr 12, 2022 8:17 AM in response to daz240

If the Related Article link doesn’t resolve your issue, Go to Settings/General/About and look at Modem Firmware. Is the entry blank? If it is you need to reinstall it by restoring the phone to factory settings, then restoring a backup. Back up the phone first, of course:

  1. How to back up your iPhone, iPad, and iPod touch - Apple Support
  2. Restore your iPhone, iPad, or iPod to factory settings - Apple Support - follow the instructions to restore using your computer, do not using Settings/General/Reset (which is not included in those instructions)
  3. Restore your iPhone, iPad, or iPod touch from a backup - Apple Support


If the modem firmware DOES have a value you may have a hardware problem. The first step is what I just posted, but after that you need to contact Apple support using the Get Support link at the top of this page.

Cellular update failed

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