Download the official firmware package for your specific model. Place the file in the root directory

The Vivo Y75A operates on the chipset and originally shipped with Funtouch OS 3.2 based on Android 7.1 Nougat. Specification Model Vivo Y75A (PD1718) Processor MediaTek Helio P23 (MT6763) OS Funtouch OS 3.2 (Android 7.1) RAM/Storage 4GB RAM / 32GB or 64GB ROM Display 5.7-inch IPS LCD (720x1440) Identifying Global vs. Chinese Software

For users stuck with a carrier-locked or region-specific variant, flashing the Global firmware can be transformative:

If your phone is working but you want the latest update:

Why go through the trouble of finding the instead of using a local version?

: Lacks the "EX" designation and typically features the OriginOS or a China-specific Funtouch OS without Google apps. Where to Find Firmware Files