FYI:
Just recieved a Letter from my Service Provider (Swisscom) and they will shut down all BlackBerry Services from January 1. 2017 i called some friends that work with the other 2 TelCo's here and they will do the same. Sunrise will deactivate the Services sometime in January and Orange is planing for March.
So if your pre OS10 Device doesn't work properly anymore in Switzerland it's the Provider screwing you over.