I don’t know anything about it but Berty uses the Wesh protocol. Here’s documentation from their website if you’d like to read into it.

Berty Wesh protocol

That wouldn’t be necessary. I had a metal phone with a replaceable battery (Motorola SLVR L7). It was more common for a cellphone to be made of plastic in the replaceable battery days because most phones were still far more utilitarian and thought of for talking, text messages, email if you had a data plan and of course Snake.

Lightweight and small was popular before large screens and smart features came along. One exception was the push-to-talk phones geared towards construction workers. Those suckers were chunky.

Same here. I have a Brother 2370DW that I’ve owned for around three years and it’s still using the toner that came with it.

The only color prints I’d make are photos and those get sent out to a printing service.