I tried these 10 page rules before and I always failed, what helped me were two things:
a) I have completely dummified my phone because I realized it destroyed my attention span. I have blocked all social media DNS, deleted a lot of distracting apps and have no colorful symbols anymore on my starting screen. I basically only use it for direct communication (no social media), Photos, Navigation and looking something up on the browser (no social media and other scrollable attention seekers again).
b) I bought an e-reader that I could take anywhere. Everytime I would pull out my phone to distract myself I pull out my e-reader now and read a few pages.
Interestingly enough this also led to me read more printed books again, not just e-books. I don't stress myself about number of books to read and reading challenges - but I have already read over 50 books this year. Before I've done this I had read 2-5 books per year only.
Gaming is still a big time eater, whenever an exciting game releases I definitely read less. But that is fine for me, because not like my phone usage, I actually enjoy playing a good game like right now Silent Hill f.