How do I get back a message thread that I accidentally deleted

Deleted messages are gone forever. Your only option would be to restore the messages from a backup (provided you do not use messages in the cloud). But, that would be at the expense of anything new since the backup.

carmelita176 Said:

"How do I get back a message thread that I accidentally deleted"

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How to Recover These:

• In the iMessages App:

On you iPhone, view the iMessages app

• Check your Mac:

See if these are in the Messages app on your Mac. If you have a Mac with these, then try boot it up (with the router powered off), and then exporting the messages from the iMessages app.

• Restore form a Backup:

You can restore your Mac from the backup. I would also consider restoring your iPhone from a backup that contains these messages. Once either is restored, then they would be back on there. Be certain you backup each device, prior to the restoration.