My iPhone 12 got this message saying “update required to use cellular data”

ok so my iphone 12 got this message saying “update required to use cellular data” so i wanted to know if i switch the sim from that iphone to another iphone would it do anything? also the other phone i wanna put the sim in is being used and has a sim in it and also it’s an iphone 12.


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iPhone 12

Posted on Mar 13, 2024 4:54 PM

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Question marked as Top-ranking reply

Posted on Mar 13, 2024 5:06 PM

First, check for a carrier update. Go to Settings/General/About and wait for 30 seconds. If there is an updated you will be prompted to install it. If there is no update, 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.

3 replies
Question marked as Top-ranking reply

Mar 13, 2024 5:06 PM in response to ransel80

First, check for a carrier update. Go to Settings/General/About and wait for 30 seconds. If there is an updated you will be prompted to install it. If there is no update, 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.

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My iPhone 12 got this message saying “update required to use cellular data”

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