Speed: Top, if the background is not just annoying run automatic updates again. I parked. I want any updates, I just want that the device is working and doing it in the current state. I will not let ruin by me updates.
Battery: I find ok. Lasts 4-5 days at my use. For me, nothing unnecessary, 3G is running out, if required WLAN, GPS, Bluetooth and other crap stay out. Software in the background is still active is terminated after use. In order to get on a decent battery life 1-2 hours despite calling per battery charge.
Voice quality: the speakers at ear could be better. The microphone seems to be good. You understand me, at least so far always good.
Display: Good, also reacts fairly well. Ok, not compared to the iPhone, but on coming to today ran no. Is software due in part, of course, partly due to the price difference.
Weight / feel: fits comfortably in the hand, is not too great, feels light. The well-rounded corners are very pleasant. The on / off button is positioned somewhat impractical. Since I'm the stick too many times with your fingers on the other side of the volume keys.
Dual-SIM operation: Works flawlessly so far. No problems for parallel operation.
Conclusion: For the price, a top device and for me as a second phone for international communication is a good investment, so as not to run even with NEM 3. phone around. 109 are there actually almost given.
What about the life has to show the time.