Make a smaller phone, like the iPhone 12 mini
Recently, my Sony Xperia XZ1 Compact broke and I had to pick a new phone. Zenfone 8 and Pixel were the only powerful phones under 15 cm. And, of course, the iPhone. I seriously considered switching from Android to ios so I don't have to carry around stupidly huge, dual-wield phone. I ended up with Zenfone, which is usable for me, but still way too big.