I buy Z2 last weak, before it i was using Z1.
Both devices have one error in their Firmware and that is about ringtone.
no matter whatever the custom ringtone you set for ringtone notification its ring only one time and then only vibrate.
For example i set a tone which is 12 second tone so when ever some one call me after 12 second the ringtone did not repeat.
Sample video
https://www.youtube.com/watch?v=IDy2RQsWqPM&feature=youtu.be
Both devices have one error in their Firmware and that is about ringtone.
no matter whatever the custom ringtone you set for ringtone notification its ring only one time and then only vibrate.
For example i set a tone which is 12 second tone so when ever some one call me after 12 second the ringtone did not repeat.
Sample video
https://www.youtube.com/watch?v=IDy2RQsWqPM&feature=youtu.be
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