iMessages sent as text message on iPhone
My IMessages on my iPhone6, to one particular person used to go through as blue and said "delivered". Now, for the last couple days when I send a text, they sit there as blue, and maybe 3-5 min later, they automatically turn green and get "Sent as Text Message". This has just been happening with this one individual.
I've turned on/off my phone, deleted the strand completely and sent new messages, turned on/off iMessage & SMS in Settings.... However, they are still being sent automatically as green text. I do have my SMS on....
Does this mean I am blocked?
[Re-Titled by Host]
iPhone 6 Plus, iOS 9.2.1