You can't have a blockchain in your cellphone. That's a fact, a fact that will never change even if you get 1 KB blocks.
Except you can.
OK, I use the wrong words. You SHOULDN'T run a full node in a cellphone. Its battery will run out quickly and your bill will be enormous for the data use. If you'll leave your cellphone connected in a spot, never to be moved, then just install a computer there. Don't do such ridiculousness.
No matter the size of the blocks, you will need a properly configured server to run a full node. Most people in the world aren't capable or don't have access to the technology of running a server (as astonishing as it sounds)
The same is true of technical skill, most people in the world are hardly technically literate enough to run MS Word.
I agree. Word isn't designed to be used by everyone. Its price is also something most people can't afford.