I experimented with the idea of the hypnotic text message on a friend of mine whom I know it particularly suggestible.
I had a small margin of success however by the very idea of a hypnotic text success rates are bound to be low as your entire presence is removed, you have no idea what state the text will find them in, what they are doing etc.
the text i sent verbatim:
"You have to want this to happen as you read this, as your eyes move from word to word, reading this on the screen, the weight of the phone in your hand, the weight of your eyes can grow, It's going to become comfortable to let them close after reading this. You can find yourself sinking and drifting, so comfortably, deeper and deeper with every breath"
The best I got was that her phone suddenly felt heavy but was emphatically told that she 'didn't want to be put to sleep'.