The Fairphone 3 received a perfect 10 in its iFixIt teardown. The modular phone is perhaps the most repairable device on the market; most major components are attached to removable modules, making repairs a snap. The back is held in with simple clips rather than adhesives, and the battery can be lifted out of the device and swapped out in less than a minute.
https://www.notebookcheck.net/The-modular-Fairphone-3-unsurprisingly-scores-a-perfect-10-in-iFixIt-teardown.434700.0.html