The mystery Oppo is comes with a 5.6-inch, 2400 x 1080 pixels, 20:9 display, housed inside a 162.0 x 75.5 x 8.9 mm body and weighs-in at 188 grams. A 4,880 mAh is keeping the lights on and contributing towards that weight figure.
Number-churning is handled by an unknown octa-core chipset and a frequency of 2GHz, alongside 8GB of RAM and 128GB of storage. TENAA lists the rather generic Wi-Fi ac, Bluetooth, GPS and dual-SIM functionality.
It comes with a 12MP, plus 8MP, plus 2MP and another 2MP module. The 8MP is likely ultrawide, while the other two modules could be a dedicated macro and a depth one.
It runs Android 10, with ColorOS on top. And, finally, that one of its colour options will be Dark Green. Its specs do sound a lot like the Oppo A31.