Shape
Must have
Must not have
Software
Price
Screen
Availability
Sold in
Kind of dumb
Texting
Audio
Maps
Rideshare
Tremp books an Uber or a Lyft over the network, so a phone with no app store can still get you one.
Works on
Only what the maker or a retailer has said in writing. Blank is not a no.
Network
Tick more than one and the phone needs all of them.