I need help on getting rid of the SMS pictured below. Whenever my phone goes to sleep, that message pops up. I've tried unsuccessfully deleting it but it would not just go away. I've reset my phone to the default settings thinking that it might disappear but it didn't. Weird thing is, it does not show on my Conversations list. Can I get some help from people in the know? Clearly, this is irritating me a lot. TIA.