I am realizing now that what I wrote here seems to primarily affect Fairphone users, so I retract my recommendation
Right now I would recommend against doing so because there is a calling malfunction in 0.18 on some /e/ user’s phones (not on mine though, 0.18 runs well on mine). Better use the latest 0.17 installation file. A fix for the aforementioned 0.18 issue is already being tested and expected to come soon though.
HELP! Just updated to 0.18 and the Phone App is not working anymore