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@micah I would really like a small and leight phone. Eg iPhone 5s (or SE 1st gen) cm 6x12 cm are in my opinion at the bigger end of my preference. But even that size is more or less impossible to get nowadays by any manufacturer (not sure for certain if there can be something 2nd hand that small that is actively supported on eg LineageOS, but I doubt).
@PublicLewdness Thanks for suggestion!
The best support I can find for a small phone is running Ubuntu Touch on my Nexus 5. That obviously has limitations and caveats but is an option.