I just saw a lot about the forward-looking nature of the system. What I want to say here is that although the 800 system is open, it will take 1-2 years to gradually mature. So if you start from 800 now, you may have to change your mobile phone two years later (people's mobile phones are updated quickly now, not to mention people who have used their mobile phones for more than five years), so it seems that the forward-looking value of the 800 system is simply not reflected now. In particular, I feel that the landlord's requirements for mobile phone software are not very high, and the function of N9 can fully satisfy you. Don't give up your phone just because it lacks a few games or applications, because compared with the games or applications that may be outdated in 1 year, the sliding operation experience is king!