“Don't look at your phone first thing in the morning” is a very common piece of advice to address an increasingly prevalent bad habit. This only gets exacerbated by the fact that many people charge their phones on their nightstand, and their phones are the first thing they look at in the morning.
Here's a good example of this advice:
Do not e-mail first thing in the morning or last thing at night The former scrambles your priorities and plans for the day, and the latter just gives you insomnia. E-mail can wait until 10am, after you’ve completed at least one of your critical to-do items…
via The Not To Do List.
I feel it's hard to get someone to not do something they already want to do, especially when their brains are wired to want it.
Instead, an interesting question (and maybe a cool idea for a product / service) is, what is the best first thing you can do on your phone in the morning? Is there some kind of experience / reminder / product that could actually make your day much better?
Perhaps it could help you plan your day, re-center, think about the big picture, and help start your day on the right foot? I would certainly find that valuable. The productivity and mental health benefits would be immense.