LG Cosmos - inbox is almost full. It will not delete any messages although it says it is deleting them. Can't delete individual or by phone number. They're not locked. I tried turning phone off & on. Any other suggestions?
You can try removing the battery (while the phone is on); wait a few minutes, then reinsert the battery and restart the phone. That will sometimes clear up memory issues.
If that doesn't work, then post back and we can further troubleshoot.