Hi there and welcome
Is the phone giving a specific error?
ok, the best way to erase is to go to settings, Applications manager
Locate the app Messages, press it and press clear data and that will erase it.
Let me know the results please.
yes that is it, and when you are there, swipe to the right and you go to the list ALL
Then you can locate the apps Messages
that is correct.
no problem and thank you