Vivo is set to launch the Y31d smartphone in Vietnam, featuring a large 7,200mAh battery with 44W fast charging. The device boasts an IP69 rating for water and dust resistance, SGS 5-Star Premium Standard certification, and MIL-STD 810H durability compliance. While not expected for an Indian launch, the Y31d may feature a Snapdragon 685 SoC and Origin OS 6 based on Android 16, with a potential January 2026 release.