PREMIUM 9H tempered glass screen protector for Samsung Galaxy J400 and J4 2018 – Top protection for your screen
Are you looking for the perfect screen protector for your mobile phone that will prevent expensive repairs and keep your device looking its best? The PREMIUM 9H tempered glass screen protector for Samsung Galaxy J400 and J4 2018 is the ultimate security solution for your precious device. This ultra-thin yet incredibly durable screen protector is designed with one goal in mind: to offer the highest level of protection against scratches, bumps, and everyday damage without affecting the functionality or appearance of your phone.
By purchasing our PREMIUM protective glass, you can enjoy the everyday use of your Samsung Galaxy J4 (2018) / J400 without worries. Forget about the fear of keys in your pocket, falls on hard floors or annoying fingerprints on the screen. Your device will remain in perfect condition, as if you had just taken it out of the box.
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Why choose PREMIUM 9H tempered glass?
The screen is the most sensitive and valuable part of your smartphone. Cracked screens can be extremely expensive to repair, so prevention is key. Our PREMIUM tempered glass is made of specially treated, clear tempered glass that absorbs impact force and distributes it across the surface, effectively protecting the original screen underneath.
Despite its exceptional protective power, the glass maintains full touchscreen responsiveness. Using the phone remains completely natural, smooth and comfortable, as if you were typing directly on the original glass of the device.
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Key product features and benefits

Unbeatable 9H Hardness: Our glass is among the most durable protectors on the market. With a hardness of up to 9H, it effectively protects against scratches, drops, impacts and other mechanical damage.
Ultra-thin design (0.3 mm): A thickness of only 0.3 mm ensures that the phone does not lose its aesthetic appeal and elegant lines, while offering maximum security.
Crystal-clear view: High light transmission ensures perfect image clarity without the surface haze effect that is common with cheaper and lower-quality screen protectors.
Advanced Oleophobic Coating: A special coating effectively repels greasy fingerprints, dirt, and smudges, allowing for easy cleaning and an always-clean screen.
Easy, bubble-free installation: Installation is quick and easy. No need for special tools or a visit to a repair shop - the glass fits perfectly on the screen of your Samsung Galaxy J400.
Perfect responsiveness: The high-quality glass material ensures smooth and comfortable use of the smartphone and maintains 100% touch sensitivity.

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Product technical specifications

Compatibility: Samsung Galaxy J400 / Samsung Galaxy J4 2018
Hardness: 9H (high resistance to scratches and impacts)
Thickness: 0.3mm
Material: Specially treated transparent tempered glass
Coating: Oleophobic coating against fingerprints and smudges
SKU: 5901646259928

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Easy installation instructions
To achieve the best result and bubble-free installation, follow these simple steps:

Thoroughly clean your mobile phone screen with the included cleaning kit (first with a damp cloth, then with a dry one) to remove all dust and grease stains.
Remove the protective film from the tempered glass that protects the adhesive side.
Carefully align the glass with the edges of the screen and the openings for the camera and speaker.
Gently press the center of the glass so that it automatically starts to stick to the screen.
Gently push any remaining air bubbles towards the edge of the screen.

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Frequently Asked Questions (FAQ) about the product
1. Does the protective glass affect the touch screen sensitivity?
No, not at all. Our PREMIUM tempered glass, only 0.3mm thick, is designed to fully preserve the original responsiveness and sensitivity of the touchscreen. Using your phone will remain completely smooth and natural.
2. How does 9H hardness work and what does it protect against?
The 9H hardness means that the glass is extremely resistant to scratches that could be caused by everyday objects such as keys, coins or even a knife. It also absorbs the force of impact when dropped, significantly reducing the chance of damage to the actual screen of your Samsung Galaxy J4.
3. Will I have problems with bubbles during installation?
Installing our PREMIUM glass is extremely easy. If you clean the screen carefully and thoroughly before installation and remove all dust particles, the glass will adhere perfectly and bubble-free to the screen surface.
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Protect your mobile phone with the premium PREMIUM 9H tempered glass screen protector and ensure long-lasting safety and worry-free use of your device. Don't risk expensive screen repairs - order your protective glass today and keep your Samsung Galaxy J4 2018 in pristine, original condition!


Responsible persons:
r2invest - R2 Invest Sp. z o. o. ul. Mars. J. Piłsudskiego 74/320 50-020 Wrocław, Poland +48 713142604, biuro@r2invest.pl
Distributor for Slovenia: Haloorodje.si, Online Sales, Rok Groznik sp, Podturn 42, 8350 Dolenjske Toplice, info@haloorodje.si, +38669731944, Slovenia
Product origin: China

Instructions for using the product:
• Clean the screen of your device with a damp cloth and remove any smudges or dust.
• Use the provided dry cloth or microfiber to completely dry the screen and remove all moisture.
• Remove the protective film from the protective glass and check that the glass surface is completely clean and free of dust.
• Carefully place the protective glass on your device's screen so that it fits perfectly and leaves no openings or gaps.
• Gently press the center of the glass and push it down until it adheres to the screen.
• If necessary, remove any air bubbles that may appear during installation by pressing on the center of the glass and pushing the bubbles towards the edge.
• Once the glass is fully attached, gently push it across the entire screen to ensure full contact between the glass and the screen.

Useful tips:
• Before installation, make sure your device's screen is completely clean and dust-free to ensure a smooth and flawless installation.
• If air bubbles appear during installation, remove them by pressing in the center of the glass and gently pushing the bubbles towards the edge.
• After installation, allow the glass to dry completely and adhere to the screen before continuing to use the device.
• Check your protection status regularly

Warnings:
• Before installation, please make sure you have a Samsung Galaxy J400 / Galaxy J4 2018.
• Do not use excessive force when installing.
• Cracked tempered glass may have sharp edges – be careful when removing.
• Do not attempt to repair or re-glue damaged glass.
• The protective glass does not provide complete protection for the phone against strong drops or impacts.
• Do not use a knife or other sharp metal objects when removing.

Same summary

The 9H tempered glass protector for Samsung Galaxy J400 and J4 2018 offers a practical solution for users who want to reliably protect the screen from scratches and impacts in everyday situations. The product is made specifically for the mentioned phone model, therefore it ensures a proper fit and smooth use of the touch screen. Tempered glass is also suitable for those who use the phone in more dynamic environments or want to ensure a longer lifespan of the device. It is worth considering that the right choice of glass is crucial especially for those who need multiple layers of protection, while it may not make sense for users who are only looking for discreet basic protection or for whom a completely natural touch feeling is extremely important.

Recommendation source: Enaa guides and team experiences.

User view

The product is often the choice of users who carry their phone with them everywhere - to school, work, on trips or outdoor activities, where the risk of drops or scratches on the screen is greater. It is especially useful for those who experience frequent changes of rooms or use the phone in crowded places, as tempered glass effectively absorbs direct impacts and protects the screen from damage.

Users especially appreciate that the protective glass does not significantly affect the look or feel of the phone, and they trust the R2invest brand, which is known for its specialization in mobile device accessories.

Why buy at Enaa

On Enaa, you can quickly find the product with precise filters, which significantly reduces the chance of ordering the wrong protection for your phone model. In addition, the online platform guides you to proven solutions from a wide range of protective glass, where you can more easily compare different options by features and intended use.

Answers to frequently asked questions

Does this tempered glass completely cover the entire screen of the Samsung Galaxy J4 (2018)?

The glass is designed according to the dimensions and cutouts for the Samsung Galaxy J4 (2018), so it covers the active screen area and key areas, while leaving enough space for cases.

Will the touch screen sensitivity be the same with this glass as without it?

The sensitivity of the touchscreen with tempered glass installed is practically not perceived by most users as having changed. Proper installation and appropriate quality ensure trouble-free use.

What to do if air bubbles appear under the glass?

If you notice air bubbles after installation, try pressing the glass gently from the center to the edges. When bubbles persist, it is often due to poor cleaning of the screen before installation.

What about compatibility with silicone or rugged cases?

Most silicone and protective cases are compatible with this glass because it is designed so that it does not extend too close to the phone's case at the edges and does not interfere with the installation of the case.

When does it make sense to replace the protective glass?

It is recommended to replace the protective glass whenever it is visibly damaged or chipped, as only intact glass effectively protects the screen from further damage.

Description updated: April 2026