I was briefly looking at the Boox Palma - which appeared to be an e-ink smartphone. I then discovered that the marketing page never mentions 4G or 5G support -

I was briefly looking at the Boox Palma - which appeared to be an e-ink smartphone. I then discovered that the marketing page never mentions 4G or 5G support - because it doesn't actually have a cellular modem. I can see how most people would take that foregranted. Ouch.