If you are looking for a good quality but cheap smartphone, the Zuk Z2 could be the mobile device for you. While international release plans are not readily accessible, the phone is available in China for the equivalent of $270 USD.
And for this comparatively very low price, you are still getting a Snapdragon 820 processor, which can also be found in the LG G5 and the Samsung Galaxy S7. Other features of the Zuk Z2 include 64G internal storage space, a fast-charging 3500mAh battery and a quick fingerprint sensor. The 5 inch screen has a pixel resolution of 1920 by 1080, which is the major concession made to offer the product at a lower cost.
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Finger-Print Camera Sensors
Smartphone Microscope Lenses
Honorable Chinese Smartphones
Smartphone Microscope Attachments