There have been rumors to the effect that Realme may update its X2 series of smartphones soon. Now, a new device that this OEM has had approved for sale in various regions is thought to be one of them. This possible X3 has a 6.57-inch display and a 4100mAh battery.
https://www.notebookcheck.net/Some-evidence-of-the-Realme-X3-pops-up-online.462025.0.html