Continuing quest for de-googling & less reliance on big-tech ... just bought a refurbished OnePlus 6 from Ebay (75€). No SIM, it is after all just a small computer. WiFi or hotspot for connections. Flashed LineageOS (de-Googled Android). Installed FDroid & a few necessary apps/PWAs from there ... Proton, Tuta, Element, Jerboa (Lemmy) & of course Mastodon. Turned off notifications. Zero bloat.
Used it for 6 hours navigation in the hills yesterday using CoMaps & location on. Battery 91%. Result