N900->N9->BB Z10->Jolla (and a spare Jolla and spare N900)

I'm using the Jolla as a main phone currently, not carrying the n900 with me all the time. The Z10 is lying in the box now with the spare Jolla and N900.
And I have a cheap 50€ China Android phone for Bluetooth LE syncing my fitness gadgets, I really would prefer to do that with my main phone...