Just reinstalled nostr:npub1235tem4hfn34edqh8hxfja9amty73998f0eagnuu4zm423s9e8ksdg0ht5 on an old Pixel 5.
Time taken? 7 minutes (Yes, really).
Tools required? Web browser, Pixel and a USB cable.
Ta...
When I upgrade my phone I'll finaly make the swap from calyx to graphine.