A mystery Realme 5G smartphone has been revealing some of its secrets thanks to a TENAA listing. The phone, which has the model number RMX2121, is believed to feature a 6.55-inch screen, OLED-type panel, and a 4,500-mAh dual-cell battery. It's possible the unnamed device could be the upcoming Realme X3 Pro.
https://www.notebookcheck.net/Potential-Realme-X3-Pro-sighting-Mystery-Realme-5G-smartphone-with-dual-cell-battery-and-6-55-inch-OLED-screen-spotted-on-TENAA.476961.0.html