Glass for iPhone Duo: what to stick on which screen? [2026]

Tempered glass or film is applied to the iPhone Duo only on the 5.4-inch external screen. Do not apply anything to the 7.6-inch internal screen, as it already has a factory protective layer with a matte finish. Additionally, you can purchase a camera cover.

The iPhone Duo has been available for sale since October 23, so it’s a good time to choose protection for it. In a foldable phone, it’s easy to make a mistake, so we start with the differences between the screens, and then compare the glasses and films available in the store.

The screen protectors for the Duo that we describe in this text are intended for the external screen. Among the brands we sell, we did not find any films for the internal screen.

iPhone Duo when unfolded. Photo: Apple.

The two screens of the iPhone Duo: what are the differences

Feature	External screen	Internal screen
Diagonal	5.4 inches	7.6 inches
Surface	Ceramic Shield 2	polymer with a scratch-resistant coating, matte finish
Does it bend	❌	✅
Front camera	12 MP Center Stage	FaceTime camera under the screen
What to apply	tempered glass, hybrid or film	nothing

Data according to iPhone Duo specifications and Apple press release.

External and internal screen of the iPhone Duo. Photo: Apple.

In Polish search results, you may come across information that Ceramic Shield 2 protects the internal screen. This is not true. Apple attributes Ceramic Shield 2 to the external screen.

Internal screen: why not to apply any film

The internal screen is factory-protected by a layer of special polymer with a scratch-resistant coating. According to Apple, this polymer is up to 40% stiffer than other materials used in the industry, and the matte nanostructured finish reduces glare and visibility of the crease line.

Apple does not explicitly state on its pages that you should not apply a film to this screen. We advise against it for three reasons:

• The film will cover the matte finish. You will lose what you pay for: less glare and a matte surface.
• The screen bends. Rigid glass will break, and regular film may lift at the crease line.
• There is a FaceTime camera under the screen. The film may degrade the image quality from this camera.

Do not remove the factory layer. This is not a transport film, but part of the screen. Apple Vice President Kate Bergeron said that the layer can be removed and replaced with a new one. According to media reports, this is done by the service, not the user.

We found internal screen films only from lesser-known brands in foreign online stores. They are not available from Spigen, ZAGG, PanzerGlass, 3mk, and Bizon.

External screen: which glass to choose

The external screen has Ceramic Shield 2, which Apple claims is three times more scratch-resistant than the previous generation. Nevertheless, it is the one that most often ends up on the table, with keys and sand in the pocket, so glass makes sense here. All the covers below are cut for a 5.4-inch screen.

Spigen Glas.tR EZ Fit Pro HD: the easiest installation

Spigen Glas.tR EZ Fit Pro HD with installation frame.

Spigen Glas.tR EZ Fit Pro HD comes with a EZ Fit mounting frame. You place it on the folded phone, press it down, and the glass aligns itself. With the rounded edges of the Duo, it’s the easiest way to avoid misapplying the glass.

There is also a version with two glasses. According to Spigen, the glass fits the cases of this brand, except for the Air Skin Aramid model.

ZAGG InvisibleShield Glass XTR6: premium glass

ZAGG InvisibleShield Glass XTR6 for the external screen.

ZAGG InvisibleShield Glass XTR6 has „external” in its name, just like the privatizing glass of this brand. It’s a good option if you prefer glass from a brand specializing in screen protection.

Bizon Glass Clear and Glass Edge: two glasses in the set

Bizon Glass Clear Duo: two glasses in the set.

The Polish brand Bizon has two basic versions of tempered glass, both also available in sets of two pieces:

• Bizon Glass Clear Duo: no frame, covers the flat part of the screen, so it works better with cases,
• Bizon Glass Edge Duo: with a black frame, covers almost the entire screen.

The second glass in the set is useful when the first one gets scratched or the installation doesn’t go well.

3mk HardGlass and HardGlass Max

On the left 3mk HardGlass, on the right HardGlass Max with a frame.

Two tempered glasses from the Polish brand 3mk: HardGlass without a frame and HardGlass Max with a black frame covering the entire screen. Both have a thickness of 0.3 mm.

Bizon Hybrid Mule: flexible instead of glass

Bizon Hybrid Mule: hybrid glass.

Bizon Hybrid Mule is hybrid glass, which means it is flexible. It is thinner and easier to install than tempered glass. A good choice if tempered glass seems too thick for you.

Matte film for the external screen

The internal screen is matte, while the external one is glossy. If you prefer both to look and function similarly, apply a matte film to the external screen. It leaves fewer fingerprints and reflects less light.

Bizon Film Matte: matte film for the external screen.

Bizon Film Matte has a thickness of 0.12 mm. The matte film slightly reduces image sharpness, but with a 5.4-inch screen used for quick tasks, this usually isn’t an issue.

Privacy glass: Touch ID is not a problem

Privacy glass darkens the screen for people looking from the side. In many phones, it complicates unlocking with a finger through the in-screen reader. In the iPhone Duo, this is not a problem, because the Touch ID reader is in the side button. The Duo also does not have Face ID.

Spigen Glas.tR EZ Fit Pro Privacy with mounting frame.

On the left Bizon Glass Edge Shadow, on the right matte Bizon Hybrid Shadow.

Privacy glasses in the store:

• Spigen Glas.tR EZ Fit Pro Privacy: with a mounting frame, also available in a set with two glasses,
• ZAGG Glass Elite Privacy: for the external screen,
• Bizon Glass Edge Shadow: tempered with a black frame,
• Bizon Hybrid Shadow: hybrid and matte, providing privacy and less glare in one.

Glass for the camera: is it necessary

On the back, the Duo has two 48 MP cameras, and Apple protects the lenses with sapphire glass, which is very resistant to scratches. Therefore, a camera cover is not necessary. It is useful when the phone often lands on its back on a surface or if you want to protect the entire camera island from cracking.

Spigen Optik Pro Glas.tR EZ Fit in Night Sky color.

Bizon Glass Lens: plate for the entire camera island.

You have two types of covers to choose from:

• full island camera lens cover: Bizon Glass Lens or Ringke Camera Full Cover,
• separate lenses for each camera: Spigen Optik Pro with applicator or 3mk Lens Protection in four sets.

Before purchasing the full island cover, check if it fits under your case.

Set: screen and back film

Bizon Film Hydrogel Pack: film for the external screen and the back.

If you carry the Duo without a case, the Bizon Film Hydrogel Pack will come in handy: two hydrogel films, for the external screen and the back. According to the manufacturer, minor scratches on the film smooth out over time.

You can find the full offer in the categories tempered glass for iPhone Duo and films for iPhone Duo screen.

How to apply glass on iPhone Duo

1. Fold the phone and place it with the external screen facing up on a flat table.
2. Clean the screen with the cloth from the set, and collect any remaining dust with the dust removal sticker.
3. If you have a mounting frame, like in Spigen glasses, put it on the phone and only then apply the glass.
4. Press the glass from the center to push out the air bubbles.
5. Do not press on the hinge when pressing the glass.

Glass and case: what to watch out for

Glass with a black frame covers the entire screen but may interfere with cases that cover the edges of the outer screen. Frameless glass, covering only the flat part, usually works with most cases. We compared cases for the Duo in the ranking of iPhone Duo cases.

If you are just gathering accessories, check out the text about the charger for iPhone Duo and our guide on the price and specifications of iPhone Duo.

Summary: glass and film for iPhone Duo

• 5.4-inch outer screen: tempered glass, hybrid or film. The easiest installation is by Spigen with a frame.
• 7.6-inch inner screen: do not stick anything and do not remove the factory protective layer.
• Privacy glass: privacy glasses do not interfere with unlocking because Touch ID is in the button.
• Camera cover: the lenses have sapphire, the cover is optional.

FAQ

Can you stick glass on the inner screen of the iPhone Duo? No. The inner screen bends, so rigid glass will break. It also has a factory protective layer with a matte finish that the film would cover. Glass is only stuck on the outer screen.

Should I remove the film from the inner screen of the iPhone Duo? No. It is not a transport film, but a factory protective layer that is part of the screen. According to Apple’s vice president, it can be replaced with a new one, and according to media reports, the service does this.

Which glass is easiest to apply to the iPhone Duo? Spigen Glas.tR EZ Fit Pro, because it comes with a mounting frame. You place it on the folded phone and the glass aligns itself.

Does privacy glass block Touch ID on the iPhone Duo? No. The Touch ID sensor is in the side button, not in the screen, so privacy glass does not affect it.

Is Ceramic Shield 2 sufficient without glass? According to Apple, Ceramic Shield 2 on the outer screen is three times more resistant to scratches than the previous generation. Protective glass still makes sense, as it is cheaper to replace scratched glass than the screen.

Do I need a camera glass for the iPhone Duo? It is not necessary, as Apple protects the lenses with sapphire glass. A cover is useful if you want to protect the entire camera island from cracking.