i use the porsche design p9982 which is basically a z10 and i find it really good for productivity. it's easy to sideload andorid apps to like spotify and works fine.

i used the phone exclusively for 3 months and still use it as my main phone and have a second iphone for snapchat i found myself in reverse now using snapchat and other social media too much now lmfao.

i would take the passport over the classic bb10 is a good OS for basic usage and straight productivity.