MB Smart is a filter for non kosher smartphones, they don’t brand phones as kosher and offer it with Spotify.
What’s the difference?
They understand that ultimately they’re just filtering a device that you own, and have to take into account what you want and expect, even if it doesn’t meet high standards.
Filters are for non kosher smartphones, targeting many who want services that can’t be considered completely kosher.
Filters aren’t giving you a hechsher.
They don’t label your device as kosher.
They just filter it.
It’s up to you how filtered you want it, and you can filter it to be completely kosher, but filtered != kosher.
If a device is branded and sold as a kosher device, then it has to be completely kosher.
What people want doesn’t change what’s kosher.
And Spotify, even filtered, isn’t fully kosher.