When Windows Phone like you get with a 640-class smartphone for little money.
- Size. Had a few doubts whether 5 inches is the right size for me. But you get used to it very quickly and do not want to miss the big screen.
- Design. The Lumia 640 has an overall very tidy impression. Was a bit surprised how easy it feels. Is also relatively thin, at least not compared to the previous Lumias as 920th
- Display. Is very good. ClearBlack is the magic word. Absolutely no comparison to 5xx series. Of course The OLED display of 730 & 930 also has its advantages, but I do a bit too garish. When IPS LCD (640 & 830) I find the colors more natural.
- Dual SIM. Is an ingenious thing. It is more flexible, there are different combinations possible. For example, personal and business.
- Battery. Keeps well. In standby is about 1 to 2% per hour. In violent use the charge for one day was good enough.
- Glance. One need not unlock to read the time. Simply pull out of his pocket and after 1 sec the time (and still a few important information) is displayed. Very helpful. And an advantage over 730 & 930th
- Navigation bar. Can be easily operated. Can demand be "wiped out", thus you get more space on the screen. Another practical feature is the lock with the double-click on the navigation bar.
- Camera and Video. Good as well. One should, of course, but not expect miracles Quallität of images is solid. Also in the video (Full HD), there is nothing to complain about.
- LTE. Unfortunately, there are not in Germany, the variant LTE + Dual SIM. But can be ordered for 180 at amazon.fr.
- A few little things like Compass and equalizer should be mentioned also. Had I missed the 520.
All in all a round thing. Bin happy.
