Some MMS messages I send get stuck in "sending" status and sometimes actually send days later. I and using a Motorola Droid Z. Is this a phone, app, or Verizon issue? Message info says it was "received by server" but status says "sending" and not "sent". I have rebooted and restart and it still happens randomly. It's in group chats MMS with a mixture or other users on iPhones and various Android phones.