Samsung's Galaxy S20 Ultra earns a 3 out of 10 on our repairability scale (10 is easiest to repair):

The fasteners, all identical Phillips screws, only require one driver and can't be mixed up, simplifying repair.

Many components are modular and independently replaceable, but the missing headphone jack means double duty and wear for the USB-C port.

Every repair starts with painstakingly un-gluing the fragile glass rear cover.

Replacing the glued-down battery is tougher than ever, especially with board interconnect cables to work around.

All-too-common display repairs require either a complete teardown or replacing half the phone.