What i do with my spare 630..since it's no good now without 10?, sell it...paper weight?....use 8.1 how long is that supported and apps?. Part of me still wants to keep it Nokia n nostalgia and you can drop it 10 x lol
What I would suggest is maybe using it as a music player. 6tag should still work with 8.1. Here maps still works and you can download maps offline.