It has hardware that most cell phones don't have.
Sub-ghz
"allowing it to receive and send radio frequencies between 300 and 928 MHz. These switches, radio locks, wireless doorbells, remote controls, barriers, gates, smart lighting, "
RFID
" including plastic cards, key fobs, tags, wristbands, and animal microchips."
Infrared
" that use infrared light (IR) such as TVs, air conditioners, or audio devices. It can learn and save infrared remote controls or use its own Universal remotes"
It also has an iButton reader.
People complain about the doorbell?
Then don't have a door bell jackasses. Being alerted that someone is at the door is it's whole purpose.