Using maximum brightness, 4G/5G, and high-performance modes simultaneously.
If you suspect hardware, visit an OPPO service center. The A78 4G’s thermal paste application is known to be inconsistent in early batches. firmware oppo a78 4g hot
: Later patches have successfully "ironed out" some kinks for certain users, leading to smoother performance and resolved heating issues after manual optimizations like resetting APN settings or updating Google Play services. Oppo A78 4g draining battery a lot : Later patches have successfully "ironed out" some
: Leftover fragments from old software clashing with new system instructions. The phone vibrated
She flashed the first test unit—a dead A78 from the scrap pile. The phone vibrated. The Oppo logo appeared. It booted. She ran a thermal stress test: CPU max, GPU max, while the phone sat on a hot plate at 75°C. The screen dimmed. A warning popped up: “Phone too hot. Shutting down in 5 seconds.” Then it powered off gracefully.
In firmware , a bug causes the modem to stay active when Ultra Power Saving Mode is turned off. The phone searches for a weak 4G signal continuously, generating heat.