was great for years used it and loved it until about 5 months ago updates have made it say unstable network constantly doesnt ring anymore and has been a pain in the butt to figure out what sound volume to turn up. After the hangouts integration phase out they completely screwed up ringtones and notification sounds. Now no matter what it only rings if the screen is awake and does not wake the screen vibrate or ring no matter what system setting or even app setting, permission i change.