Since there’s no way for iOS users to delete all the messages at once, Apple offers an auto-delete feature to Messages. If you have turned on this feature, your iPhone will keep deleting messages automatically and regularly.
Does iPhone delete messages after a while?
Your iPhone can automatically delete messages after 30 days or one year. Or you have your iPhone save your text messages forever.
Why did my iPhone messages disappear?
Sometimes iPhone text messages disappear from the inbox after an iOS software update or after a restart, but there are also cases that text messages just disappear from iPhone suddenly. If you have made backups for your iPhone before, you can always recover lost iPhone messages by restoring from iPhone backup files.
How long will iPhone keep text messages?
Scroll down and select the Keep Messages option under the Message History heading. Choose for how long you would like to keep the messages on your iPhone: 30 Days, 1 Year, or Forever. Depending on your choice, you might be prompted to confirm it by tapping the Delete button.