My iPad shows cellular update failed.how do I fix it?
My iPad shows cellular update failed. How do I fix it?
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You might try restoring to Factory Settings - which should reinstall all firmware:
Restore your iPhone, iPad or iPod to factory settings – Apple Support
If the Factory Restore process is unsuccessful in reloading the Carrier firmware, your iPad may require repair. In such circumstances you would be wise to seek assistance directly from Apple Support, or the technicians at the Genius Bar of your local Apple Store.
You can contact Apple Support using the Get Support link that also appears at top-right of this page. You can also initiate a support case using the excellent Apple Support App: