Can't get rid of one text message I have had this single text message on my phone since June. It simply won't delete. It comes through my Twitter account and is send to my SMS, but all other such texts delete easily.

|H
| E
|  L
|   P
|    !
|_____!
Deleting cache and data of messaging app should help.Also clean cache of other sms apps including hangouts if you have installed them. Is this  sms is moved to SIM for some reason?I always backup and then clean and never keep in SIM.