How to Choose a Good Glass on a Xiaomi Phone

Modern Xiaomi and Redmi smartphones are equipped with high-resolution displays, but their screens remain one of the most vulnerable design elements. Manufacturers often use tempered glass Corning Gorilla Glass or its counterparts, but even the most durable materials do not guarantee 100% protection from falls and scratches. The appearance of microcracks or deep chips can not only spoil the appearance of the device, but also significantly reduce its liquidity when resold.

Device owners often face a dilemma: which is better, classic glass, hydrogel film or more modern ceramic analogues? Accessories market is full of offers with labels 3D, 4D, 5D and even 10D, which creates confusion for the untrained user. It is important to understand that marketing names do not always reflect the real physical properties of the product. In this article, we will discuss in detail how to choose the optimal protection for your Xiaomi, given the design of the case and screen.

The wrong glass can lead to problems with the fingerprint scanner, reduce the sensitivity of the touchscreen or the appearance of "rainbow" glare on the edges of the display. This is especially true for models with curved screens or cutouts for the front camera of a non-standard shape. A competent choice of accessory will preserve the tactile sensation and color reproduction, as close as possible to the original. Let's understand the nuances, so as not to overpay for unnecessary functions.

Types of protective coatings: glass, hydrogel or ceramics?

The first thing to decide on is the material of the protective layer. Classic tempered glass remains the most popular choice because of its ability to take the impact. When hit hard, it breaks, keeping the phone's matrix intact. However, they can break off at the edges and not always fit perfectly with the curved screens of the Mi Curved series.

The alternative is hydrogel films, which are made of polymeric materials that can tighten small scratches during the day, a type of protection that is ideal for screens with rounded edges, because the film does not peel off on the sides, but the hydrogel is worse at saving from point impacts (for example, falling with keys in a pocket) and has a specific, slightly rubbery surface texture.

⚠️ Note: Hydrogel films can reduce the sensitivity of ultrasonic fingerprint scanners if they are too thick or of poor quality.

The third option is ceramic glass, which is a trade-off between the first two types: they're flexible like a hydrogel, but hard to the touch like glass, and ceramics are almost non-beatable, and they extinguish vibrations perfectly when impacted, but they cost a lot more and often have a thicker layer of glue.

• 🛡️ Tempered glass: maximum impact protection, hardness, but can break when falling.
• 💧 Hydrogel: protection from scratches, perfect fitting edges, self-healing, but weak protection from punctures.
• 🏺 Ceramics: flexibility, high strength, no fragments, but high price and complexity of sticker.

The choice of material depends on your smartphone usage style, and if you drop your phone frequently or work in an aggressive environment, glass is preferable, and for those who carry the phone in the same bag with keys and appreciate the aesthetics of whole faces, hydrogel is the best solution.

What do 3D, 5D and 9H mean?

When choosing an accessory in a store or marketplace, you can see a lot of digital notations. Marketing dictates its rules and manufacturers are constantly coming up with new names. 3D glass means that it has rounded edges that repeat the bending of the screen. 5D and 9D are usually just more rounding or the presence of additional layers (oleophobic, adhesive), but physically it is the same glass.

A more important parameter is the Mohs hardness, which is often referred to as 9H. This means that the glass surface can withstand contact with objects with hardness up to 9 units (diamond has hardness of 10). However, it is worth remembering that 9H hardness refers to scratch resistance, not to impact resistance. Glass with hardness of 9H can be more fragile on impact than a softer counterpart.

You also need to look at transparency and oleophobic coatings, because cheap glass often doesn't have a good fat layer, which makes your finger slip worse and your screen get dirty faster, and you can check for coatings by putting water on the surface, and if the drop is ball-shaped and rolls easily, you have coatings, and if it spreads, you have a cheap one.

• 🔢 Numbers D (3D-10D): It indicates the degree of rounding of the edges and the number of layers, not the level of strength.
• 🔨 Firmness 9H: It protects against scratches with keys and scissors, but not from falling on asphalt.
• 💧 Oleophobic coating: a critical layer for comfort and protection from greasy traces.

It is better to choose glass from a proven brand with 3D or 2.5D markings, but with real quality, than to overpay for a space 15D from an unknown manufacturer.

Compatibility with Xiaomi and Redmi models: nuances of cutouts

Xiaomi produces a huge number of models, and each series has its own design features. When choosing glass, it is important to consider the location of the front camera, speaker and proximity sensors. For example, in the Redmi Note series, the camera notch is often in the upper left corner, whereas in the flagship Xiaomi Mi it can be in the center. Incorrectly selected glass can overlap the camera or sensor, which will lead to the failure of functions.

Special attention is required models with curved screens (Curved), such as Xiaomi Mi. 10, Mi 11 Xiaomi 12/13 Pro. They don't have flat glass, they'll have gaps on the sides (the "white rainbow effect") and they can peel off. 3D glass with a black frame around the perimeter or hydrogel films.

Another important aspect is compatibility with covers. If you wear a massive shockproof case, the edges of the glass should not bend too much, otherwise the case will lift them.

Effect of protective glass on the fingerprint scanner

Many modern Xiaomi smartphones are equipped with an underscreen fingerprint scanner, optical or ultrasonic sensors that read a finger pattern through a display. Installing a poor-quality or too thick security glass can disrupt this function. The scanner will simply stop responding to touch or will be mistaken.

Optical scanners (glow green when touched) are less demanding, but they can also fail if the glass has a low transparency or matte surface. Ultrasonic scanners (found less often, mainly in flagships) are extremely sensitive to the thickness and density of the material.

⚠️ Warning: If the fingerprint scanner stops working after the new glass is labeled, try removing the old prints from your memory and re-write them through the new protective coating.

Also worth mentioning is the sensitivity of the touchscreen: Cheap glass can create dead zones around the edges or cause ghost presses, which is due to a violation of the electromagnetic permeability of the material, so you should focus on brands that specialize in smartphone accessories, rather than universal solutions for all models.

• 👆 Optical scanner: requires high glass transparency in the sensor area.
• 🌊 Ultrasonic scanner: critical thickness and density of the material, better hydrogel.
• 🔧 Rewriting a fingerprint: mandatory procedure after installing any protection.

If you plan to use glass thicker than 0.33 mm, make sure the manufacturer claims to support fingerprint scanners, otherwise you risk getting beautiful but uncomfortable protection that requires constant password input.

Instructions: how to properly glue glass without bubbles

The quality of the installation is as important as the quality of the glass itself, even the most expensive tread will look bad if there is dust under it, first prepare the workplace: it must be well lit and, most importantly, free of dust, ideally wet cleaning the room before the procedure.

Complete with quality glass, there is usually a set for installation: a wet wipe, dry cloth, dust remover (sticky tape) and a guide frame. Don't neglect any of these elements. First wipe the screen thoroughly with a wet wipe, then dry with a dry cloth. After that, use a sticky tape to remove the smallest villi.

If the glass has a guide frame, put it on your phone. If not, carefully align the window slots with the speaker and the camera. Smoothly lower the glass onto the screen. Quality glass has a silicone layer that spreads itself across the surface with a light press in the center. Don't push hard so you don't squeeze the glue out of the edges.

Sequence of action:


Screen cleaning (Wipe 1)




2. Dust removal (Dust remover)




3. Combination of cutouts




Centre gluing




5. Driving bubbles from center to edge

If you have bubbles, don't try to push them out with your nail, you can damage the matrix. Use a plastic card wrapped in a cloth or a special applicator from the kit. Move from center to edge. Small air bubbles can disappear on their own within 24 hours.

💡

Use the bathroom after taking a hot shower. High humidity settles on the walls, nailing dust to the floor. This is the best place to stick glass without villi.

TOP manufacturers and price categories

The accessories market for Xiaomi has formed a clear gradation of brands: the leaders of quality are considered to be Nillkin, Spigen and Baseus. Their products are characterized by perfect geometry, high-quality oleophobic coating and high transparency. The cost of such glasses can be from 500 to 1500 rubles, but the service life and comfort of use are worth it.

The mid-range is occupied by brands like Hoco, Remax and Rock, which offer good value for money, often with a frame to facilitate stickers, and also with high hardness and protective properties, although oleophobic coatings can be erased a little faster than premium ones.

The cheap segment (NoName, "10 rubles for 3 pieces") is a lottery. These glasses often have poor stickiness, a cloudy layer or uneven edges. They can protect against a major scratch, but if a serious blow is more likely to hurt, crumbled into small fragments. It is not worth saving on screen protection, since replacing the display will cost ten times more.

💡

The best choice is medium-priced glass (Baseus, Nillkin) with 3D marking and a stated hardness of 9H. This is the optimal balance between protection, convenience and price.

When buying, pay attention to the packaging. Quality glass is always sold in a hard box or a durable blister. If the product is in a regular plastic bag, there is a high risk of getting it already with microcracks. Also check for quality certificates, although this is rare in the accessories segment.