Oppo A78 Problems: 100% Fix Guide
Is your 67W charging slow or battery draining? Here is the ultimate 15-step ColorOS 13 optimization guide.
The OPPO A78 4G/5G is a stylish performer with its Glow Design and 5000mAh battery. However, budget processors like Snapdragon 680 can struggle with heavy multitasking, leading to app lag and slow charging issues over time.
Your phone is capable; it just needs ColorOS optimization. Follow these steps to restore its "Glow".
| Problem | Settings to Check | Fix Difficulty |
|---|---|---|
| Slow Charging | Optimized Charging | Easy |
| App Lag | RAM Expansion | Medium |
| Battery Drain | Auto-Launch | Easy |
Diagnostic Hub
Slow Charging
Fixing 33W/67W SUPERVOOC speed issues.
App Lag
Smoothing out UI stutter and freezing apps.
Battery Drain
Optimizing 5000mAh battery on ColorOS.
Camera Blur
Fixing focus hunting on the 50MP sensor.
1. Fixing Slow Charging Issues
SUPERVOOC is fast, but dust or settings can slow it down to 10W.
- Clean Port: Use a non-conductive toothpick to gently remove lint from the USB-C port. This is the #1 cause of slow charging.
- Optimized Charging: Go to Settings > Battery > Optimized Night Charging. Turn it OFF if you charge during the day. It purposely slows down charging to protect battery health.
- Cable Check: Ensure you are using the original white OPPO cable. Other cables do not support SUPERVOOC protocols.
2. Solving Lag & Freezing
The Snapdragon 680 is decent, but 8GB RAM can fill up fast with ColorOS bloat.
- RAM Expansion: Go to Settings > About Device > RAM. Set expansion to +4GB. Don't set it to +8GB as it puts too much load on the slower eMMC/UFS storage.
- High Performance Mode: Go to Battery > Advanced Settings. Turn ON "High Performance Mode" only for gaming. Keep it OFF for daily use to save battery.
- Animation Scale: Go to Developer Options. Set all three animation scales to 0.5x. This makes the A78 feel significantly faster.
3. Optimizing 5000mAh Battery Life
ColorOS has many background services. Let's restrict the unnecessary ones.
- Auto-Launch: Go to Apps > Auto-launch. Disable everything except WhatsApp or essential apps. This prevents apps from restarting themselves.
- Screen Refresh Rate: If battery is priority, set Refresh Rate to "Standard" (60Hz) instead of "High" (90Hz). This saves about 10% battery.
- Super Power Saving: Use this mode (in Battery settings) when you are under 20%. It restricts everything but gives you hours of talk time.
4. Fixing Camera Blur & Focus
The 50MP camera needs stability. Blur often happens due to software lag.
- AI Retouching: Turn OFF "AI Portrait Retouching" if photos look soft or blurry. It sometimes over-smoothens details.
- Tap to Focus: Always tap the subject on screen before shooting. The autofocus on budget sensors can be slow in low light.
- Cache Clear: Long press Camera Icon > App Info > Storage > Clear Cache. This resets any buggy camera settings.
Additional Maintenance (Steps 13-15)
- Step 13 (App Lock): Use the built-in "App Lock" to secure sensitive apps instead of third-party lockers that drain battery.
- Step 14 (Restart): Restart your phone every 3 days. It clears the RAM buffer and keeps the UI smooth.
- Step 15 (Update): Check Software Update. OPPO releases stability patches frequently for A-series phones.
Is Your A78 Ready?
The OPPO A78 is a solid daily driver. With these tweaks, you get the battery life and charging speed you paid for.
Love the Glow Design? Share your color below!
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