Don't have Telegram yet? Try it now!
https://manhung.tech/2018/10/29/lumia-640-%e5%be%a9%e6%b4%bb-microsoft-research-%e5%b1%95%e7%a4%ba%e9%bb%91%e7%99%bd%e5%89%af%e8%9e%a2%e5%b9%95%e6%89%8b%e6%a9%9f/
Lumia 640 復活? Microsoft Research 展示黑白副螢幕手機