If this works for you, then great, do it as long as it works. But for me this will never work. What actually has worked though, is being in an enjoyable environment (surrounded by friends and family, lab / hobby equipment, quality books and poetry, or just spending a couple of hours outside) that can grab my attention better than those social media apps. Also, I regularly delete and recreate my social media accounts.

Additionally, a very effective way of becoming less attached to the phone is to occasionally "forget" to bring it out with you, but that only works if you for example don't need maps or aren't expected to take a phone call. The key-point here is the irregularity, because then over time you will get used to replacing smartphone usage with some other joyful (or idle) activities instead of just moving the dopamine rush hour around. Furthermore I believe that embracing boredom is a must, and I just accept that sometimes I will be bored with nothing to do for a couple of hours and that's when I get most creative.