The OPPO A78 5G will run on the ColorOS 13 flavour of Android 13 out of the box.
Oppo A78 5G review: Long-Lasting Impressions - Tech Advisor
OPPO A78 5G: Specs, price in the Philippines
OPPO A78 hands-on impressions: A Complete Entertainment Package
Oppo A78 4G Leaks with Promo-Material and Launch Date; Have a Look - WhatMobile news
Oppo A78 5G budget phone with Android 13, 50MP dual cameras launched in India: Specs, price - Technology News
Oppo A78 5G India Launch Date Revealed, Specs & Price Leaked as Well - Gizmochina
Oppo A78 4G - Full phone specifications
Oppo A78 5G Price in India, Launch Date, Specifications Tipped, Said to Get MediaTek Dimensity 700 SoC
Oppo A78 4G officially teased in India, launch imminent - Gizmochina
oppo A78 5G unboxing & review
Oppo A78 4G launched with 6.43 AMOLED display, 50MP dual camera & Snapdragon 680 SoC - Gizmochina