I am very unhappy with Umidigi. Though the Umidigi Bison x10 boasts incredible specs for a decent price, it was the macro 5 mp features that ultimately swayed me to choose the Umidigi Bison x10. But sadly this feature has been a huge disappointment. I bought a Umidigi Bison X10 5 months ago because of all the good reviews. By now we know 5-star reviews are mostly paid for or fabricated. Besides the X10 disappointing camera features, I also experience problems with the sound and most recently the failure of the fingerprint sensor unit. When I researched online, I discovered that this is a common occurrence. The warranty is also a big turn-off. Clearly, there is a problem with BISON X10 and they should recall the whole series. The failure of sensors and other parts on new phones is ridiculous. It is better to have a less rigid phone and drop it than to have a rigid phone that can not function under normal use. I bought my Bison X10 through Joom. Even though Umidigi offers a ONE-year warranty the reseller only offers a 30-day warranty. Talk about getting knocked off by Umidigi and friends. On the scale of rip-offs, this is a huge 10X fail. Stop ripping off your customers.

For phone calls it's likely using the top microphone ( assuming it has one since most phones now days have 2 ), for other things it's using the bottom