Voice quality is good in my opinion.
You can set different ringtones for the two simcards, so you know matter what simcard is called.
Otherwise, the phone has all the standard features that should have a mobile phone, such as alarm clock, Bluetooth, Organizer, UWS.
Furthermore, you can use an 8GB MicroSD card into the device and then use it as an MP3 player.
Also very convenient is the offline mode, through which one can use the device in airplanes as MP3 player and does not have to turn off.
A negative point is there still. When supplied no data cable to connect to the PC is, this is really weak.
Conclusion:
Very good Dual Sim Mobile Phone with no frills. Who owns 2 Sim cards and wants to use the phone only to make phone calls without ever 2 phones here wanting to have, is hereby well served.