By clicking the button above, you consent to acquiring calls and emails from RingCentral. Phone calls could be related using automated technology. Sure, there is not the USB but i see there are pins for GPIOs and GND 5V / 3v3 so i believe soldering pins are Okay to flash https://tituszwurq.qodsblog.com/26938839/manual-article-review-is-required-for-this-article