After using my new UMI Super smartphone a few more days, I can report on more experiences.
Audio Quality. The vendor, UMI, had promised the audio would be fabulous. And it is -- whether listening by corded headphones, Bluetooth ones, or plugged directly into a fine stereo. As I noted in my earlier review, this $200 phone still boasts a 3.5mm headphone jack, unlike $800 models from other cellphone companies, such as that one in California.
For even better sound, I recommend the Neutron app, which uses advanced processing to improve the sound even more. https://play.google.com/store/apps/details?id=com.neutroncode.mp&hl=en
Battery Life. I was excited in getting a phone with a 4000mAhr battery, which is about 1/3 bigger than most phones today. Commenters on the UMI forum feel the battery probably isn't that big. With moderate usage, it lasts 24 hours; with heavy usage, about 16. So no way it will last two days, sadly, as UMI claims.
Fingerprint Reader. I have come to appreciate the fingerprint reader. I never used security on my Android phones, because it was just one more step to turning it on -- or four more steps, when a 4-digit number has to be entered. But with the fingerprint reader, I just press my finger and the phone is unlocked and turned on in one step -- instantly.
I recorded a finger on each hand: left hand for normally turning on using two hands, right hand for one-handed turning on. Should the phone have difficulties reading the finger print, the backup is to enter a password.
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So, in summary:
- Audio Quality: Great!
- Battery Life: Sufficient for a day
- Fingerprint Reader: Great!