How to delete all messages in the ifone 5 at one?

[iMore Question]

My ifone 5 needs to delete all messages at one time

 

[Ledsteplin]

Welcome to iMore! Can you just delete the thread?
Tap edit

Tap the dot then delete at the bottom.

You can set messages to auto delete after 30 days, 1 year, or forever.
Go to Settings > Messages > scroll down to keep messages> set keep time.