| Feature | Vivo Y75A Global Firmware Top | Custom ROM (e.g., GSI) | | :--- | :--- | :--- | | | Full Vivo AI camera optimization (Super HDR, Bokeh) | Usually broken or low quality | | Funtouch OS Features | Gestures, Game Mode, Ultra Game Mode, Multi-Turbo | Missing or buggy | | Stability | 100% stable for daily use | Beta quality, random reboots | | Widevine L1 | Supports HD Netflix/Prime Video | Drops to L3 (SD only) | | Banking Apps | Works out of the box (Safetynet pass) | Requires Magisk mods, often fails |

Regional firmwares sometimes disable specific 4G bands to segment markets. The global top firmware of LTE bands the Y75a hardware supports. Users report better signal strength in rural areas and faster carrier aggregation—meaning your YouTube streams buffer less.