OPPO A78 5G Cases & Screen Protectors: Complete Guide

The OPPO A78 5G is an older 5G A-series phone with a 90Hz display, 5000mAh battery and 33W charging. MEZON’s current collection is focused entirely on the screen: there are five different protector styles, but no case is presently listed. This guide explains those options and what to look for if you source a case elsewhere.

1. Confirm the OPPO A78 5G model

Open Settings → About device and confirm your phone is OPPO A78 5G (CPH2483). Do not confuse it with the separate OPPO A78 4G, which has a different display, processor and body design.

2. OPPO A78 5G at a glance

• 6.56-inch LCD: HD+ 1612 × 720 resolution.
• 90Hz refresh rate: Smoother scrolling than a standard 60Hz panel.
• 600-nit sunlight brightness: Designed for useful outdoor visibility.
• Reinforced Panda/Caihong cover glass: Built-in durability still benefits from a replaceable protector.
• 50MP main camera: Supported by a 2MP secondary camera.
• MediaTek 6833 5G platform: Gives the A78 5G its network connectivity and everyday performance.
• 5000mAh battery: Paired with 33W SUPERVOOC charging.
• Approximately 188g and 7.99mm: A slim case is the most natural match if you add one separately.

3. What to look for in an A78 5G case

MEZON’s current collection does not list a case for this model. If you choose one elsewhere, make sure it is specifically labelled for OPPO A78 5G, leaves the side controls accessible, protects the camera area and does not press against the edge of your chosen screen protector.

4. Five screen-protection choices

4.1. Ultra-clear film

Ultra-clear film is a thin glossy option for basic scratch protection with minimal visual change.

4.2. Matte film

Matte film is aimed at users who want less glare and fewer visible fingerprints.

4.3. Hydrogel film

Hydrogel film provides flexible close coverage with very little added thickness.

4.4. Case-friendly tempered glass

Case-friendly tempered glass is the hard-glass choice with the most deliberate edge clearance for a case.

4.5. Full-cover tempered glass

Full-cover tempered glass extends farther across the front for broader hard-glass coverage.

5. Film or tempered glass?

Protector	Main advantage	Best for
Ultra-clear film	Very thin glossy protection	Minimal visual change
Matte film	Reduces reflections and visible fingerprints	Bright environments
Hydrogel film	Flexible, close-fitting protection	Minimal thickness and case compatibility
Case-friendly tempered glass	Hard 9H glass with more edge clearance	Tightly fitted cases
Full-cover tempered glass	Broader hard-glass coverage	Users who prefer a rigid glass surface

If you are adding a third-party case, case-friendly glass or one of the thin film options is usually the safest pairing.

6. A useful detail from OPPO: the hidden light sensor

OPPO notes that the light-sensor opening is hidden at the top of the A78 5G display. Dark or poor-light-transmission screen protectors can interfere with it, so a clear correctly designed protector is preferable.

7. Installation tips & common mistakes to avoid

Most installation problems come from dust or alignment rather than the protector itself. A clean setup makes a noticeable difference.

• Wash and dry your hands before starting.
• Work on a clean surface away from fans, open windows and airborne dust.
• Clean the screen thoroughly with the supplied cleaning materials.
• Remove every visible dust particle before exposing the adhesive side.
• Check orientation and alignment before applying the protector fully.
• For film and hydrogel, apply progressively and use the installation card to smooth the protector across the display.
• For tempered glass, do a dry alignment check first, then lower the glass evenly and let the adhesive spread.
• Avoid repeatedly lifting and repositioning the protector, as this can introduce dust or weaken adhesion.
• Avoid dark or tinted material over the upper display area because OPPO warns it can interfere with the hidden light sensor.
• If you also use a case, install the protector first and check that the case edge does not push against it.

8. Current OPPO A78 5G screen protectors at MEZON

	3-Pack Hydrogel Film Thin flexible protection with close screen coverage.
	2-Pack Case-Friendly Tempered Glass Hard 9H glass with extra edge clearance.
	2-Pack Full-Cover Tempered Glass Broader hard-glass coverage across the front.

9. FAQ: OPPO A78 5G screen protection

Does MEZON currently sell an A78 5G case?

The live collection currently lists five screen protectors and no case.

Can an A78 4G case fit the A78 5G?

No. They are separate models with different dimensions and displays.

Which option is best with a tight case?

Case-friendly tempered glass or a thin film protector gives the most edge clearance.

What is the best option for glare?

Matte film is specifically designed to reduce reflections.

Why does light transmission matter?

The A78 5G has a hidden light-sensor opening near the top of the screen, so darkened material can interfere with normal sensing.

Compare all current choices in the OPPO A78 5G screen protector collection at MEZON.