when i have spreadcoins for what ratio i get helium when the coin release?
It will be a 1:1 swap.
ok when i can do the swap? and will i lose my spreadcoins?
There will be a blockchain snapshot taken for spr in the near future. For now your best bet is to hold your spr in your wallet for the snapshot. You will be due as many HLM as you have spr on the date the snapshot is taken.
You get to keep all of your spr as well.
I recommend joining the Helium slack for more info, see here:
https://heliumslack.herokuapp.com/