Recover deleted text messages without a computer
Is there a way to recover deleted texts without linking to a computer? I only gave my iPhone
iPhone 7 Plus, iOS 11.2.2
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Your text messages are saved on your most recent iPhone backup.
Without a computer, perhaps you still performed a backup of your iPhone to iCloud. If you did, restore the backup and you will retrieve the text messages (and other data) that were present when the backup was created.
Restore your iPhone, iPad, or iPod touch from a backup - Apple Support
If you did not create an iCloud backup, the messages are gone.