A dedicated e-reader is way better for reading than a smartphone or tablet. They use e-ink screens which are better for your eyes and for battery life.

Also there are dedicated mobile music players. A lot of them are targeted at the audiophile market and can drive high impedance headphones and have a high quality dac. But most people aren’t audiophiles and don’t use headphones that would benefit from something better than a smartphone.

I would guess all commercial routers and access points hae the option to automate something like that. So you only have to set it up once and it’s not really much work (unless something breaks)