So, I have a 4s that's jail broken on the current 5.1.1 os and baseband. I know I can get a Gevey ultra s for this version and I'm ok with that.

My bigger question is that if I spend the money currently on a Gevey how future proof is it? Is it upgradable or it a possibility that with each version it just stops working? Any other reliable brands besides Gevey or RSim?

TIA