An update is required to use cellular data in this iPhone - Error message

hamada224 Said:

"I have message that an update is required to use cellular data in this iPhone: what is the solve for this problem"

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Try updating via a computer. There are two important steps here: Backup, then Install the Update:

1. Important: Backup First - Make a backup of your device using iCloud or your computer. That way you can have something to restore you iPhone from, should anything go wrong with the update installation. Be certain to use an external hard drive of at least 1.5 your iPhone's' internal storage, assuring you have enough backup storage.

2. Then, Update Using Links:

• On the iPhone itself: Update your iPhone, iPad, or iPod Touch - Apple Support
• From a Mac: Update Software on iOS Devices in iTunes on Mac - Apple Support
• From a PC: Update Software on iOS and iPadOS Devices in iTunes on PC - Apple Support