Recently, a Vivo phone with the model number V1901A (or V1901T) has surfaced on Geekbench. With its 4GB of RAM, Android 9 ROM and 2.3GHz SoC, its specs hint at a new solid budget option waiting in the wings. Its TENAA listing supports this, as it states that this phone (possibly the Y3) has 3 cameras on its rear panel.
https://www.notebookcheck.net/The-Vivo-Y3-an-entry-level-phone-with-a-triple-camera-leaks-out.420486.0.html