How to open the lid of the Xiaomi Redmi 4 phone: a guide

Modern smartphones like the Xiaomi Redmi 4 often have a monolithic body, making access to internal components unobvious to the untrained user.Many owners wonder how to open the lid to replace the battery, clean the speaker or install a new one. SIM-It's important to understand that in this model, the back panel is not removable in the classical sense, like in old button phones.

The opening process requires precision, special tools, and an understanding of the design of the device. Mistakes can lead to damage to plumes, rupture of contacts, or even battery bloating. In this article, we will discuss in detail the algorithm of actions, the necessary tools, and the typical mistakes that beginners make when trying to repair themselves.

Before you start dismantling, you need to make sure that you are doing it. If the device is in warranty, any violation of the seals will result in a denial of free service. However, if the warranty has already expired and the phone requires intervention, following the verified instructions minimizes the risks. The glue holding the Redmi 4 cover melts when heated, so using a hair dryer or heating pad is a must.

Tools and workplace preparation required

To successfully and safely open the case Xiaomi Redmi 4 you need a minimal but specific set of tools. Use of improvised tools such as knives or needles, is highly undesirable, as they can damage the plastic or, worse, puncture the battery. The main tool will be a plastic blade or mediator, which does not conduct electricity and is less traumatic to the case.

The heat source is also critical. A household hair dryer is fine, but you can't use a building hair dryer because of the risk of overheating. The ideal option is a special heating pad for phones that allows you to warm up the perimeter evenly. Don't forget to prepare a suction cup that will help create an initial gap between the screen and the case after softening the glue.

• 🛠️ Plastic blade or mediator for accurate snapping of latches.
• 🌡️ Hair dryer or heating platform for softening the adhesive layer.
• 🧲 Magnetic mat or screw container to avoid losing small details.
• 🧴 Isopropyl alcohol or special solvent of glue (optional, for cleaning).

Organize the workspace so that it is well lit and free of foreign objects. Small screws have the ability to fly and get lost in the pile of the carpet or fall into the crevices of the table. Magnetic mat will be a great assistant, allowing you to fix the fasteners in the order of their extraction, which will facilitate assembly.

Heating process of the shell and primary opening

The most important step in determining the success of the operation is the uniform heating of the perimeter of the smartphone. The glue used by the manufacturer hardens at room temperature and becomes elastic only when heated to 80-90 degrees. Insufficient heating will cause the plastic to crack or deform when you try to open the lid.

Turn the dryer on at medium power and direct the hot air flow to the ends of the device. Move the phone or hair dryer around, paying special attention to the corners where the glue layer is usually thicker. The heating process takes 2 to 5 minutes depending on the power of the heat source. Periodically check the temperature of the case with your hand - it should be hot, but not burning.

⚠️ Warning: Do not heat the device for longer than 5-7 minutes in a row and monitor the temperature.Overheating can damage the display matrix or cause the lithium-ion battery to bloat, which is dangerous to health.

After sufficient warming, carefully place the suction cup at the bottom of the back cover, closer to the volume buttons. Pull the suction cup upwards, creating a vacuum, and simultaneously try to insert a thin blade of the plastic blade into the resulting gap. If the gap does not form, repeat the heating procedure. Do not apply excessive force, act gently and progressively.

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If you don't have a suction cup, you can use a thin line or dental floss, and you can grab a phone around it, and as you do the sawing movements, cut through a layer of heated glue around the perimeter.

Disconnection of plumes and dismantling of internal components

Once the plastic blade has entered the gap, it must be carefully guided along the perimeter of the case, snapping away hidden plastic latches. A characteristic click will signal the successful release of the next section. Move slowly, trying not to touch the internal components located close to the lid.

When the lid is completely separated from the frame, don't rush it off completely.In Xiaomi Redmi 4, the fingerprint scanner plume (if the Pro model) or other connectors can be glued to the inside of the lid.A sharp jerk is guaranteed to cause the plume to break.A careful look at the insides before the final partitioning.

To turn off the plumes, use a plastic blade or a special tool to open the connectors. Never pull the wires themselves, the impact should only be on the hard part of the connector. Some connectors have locking latches that must be bent before extraction.

Battery replacement and system maintenance

One of the most common reasons Xiaomi Redmi 4 disassembly is a battery replacement. Over time, the battery capacity drops and the phone stops holding charge. Once you gain access to the insides, you will see that the battery is also glued to the body with double-sided tape.

Removing the old battery will require heating again, warm up the back of the device (now the inside of the case), and use a plastic card or spatula to jeopardise the battery.

• 🔋 Clean the seat of the remnants of old glue and scotch.
• 🧹 Blow the insides from dust using a pear or can of compressed air.
• 🔌 Check the condition of the connectors for oxidation or contamination.
• 🧪 Degrease the surface with alcohol before installing new glue.

When installing a new battery, make sure its plume is properly positioned and not squeezed. Poor contact can cause the phone to not see the battery or charge will go wrong. Once connected, check the device's health without assembling the case completely.

Assembly of the device and checking leakage

The assembly is done in reverse order, but with one important difference: you need to apply a new layer of glue. This uses a special glue B-7000 or T-7000, which remains elastic after drying, or bilateral tape, cut into the shape of the case. Apply the glue with a thin strip along the perimeter of the frame.

Combine the lid with the body, making sure that all the plumes are removed and do not fall under the adjoining plane. Tightly press the edges around the perimeter. For better fixation, it is recommended to use stationery gums, stretching them across and along the smartphone, and leave the device to dry for 1-2 hours.

⚠️ Warning: Do not turn on the phone immediately after assembly if you use liquid glue. Give it time to grab, otherwise the adhesive fumes may settle on the cameras or sensors, causing them to become cloudy.

Once you dry, remove the rubber bands and check the density of the lid, which should not luft or squeak when pressed, turn on the device and test the basic functions: touchscreen, sound, vibration and operation of communication modules.

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The quality of the gluing directly affects the protection against dust and moisture, as well as the strength of the case in everyday use.

Typical errors and precautions

In the process of dismantling Xiaomi Redmi 4 beginners often make mistakes that can be fatal to the device. One of the most common is trying to open a cold phone, which almost guaranteed leads to breakage of plastic latches, which in the cold or at room temperature become brittle.

Another mistake is using metal tools to lid the lid, which can short the contacts on the board if you accidentally touch them, or leave deep scratches on the frame, and the metal tool can more easily pierce the battery, which causes instant fire.

• ❌ Ignoring heating of the body before opening.
• ❌ Application of brute force in latching.
• ❌ Disabling plumes without first removing the blocking plates.
• ❌ Assembly of the phone with dust or pile that fell under the cover.

Be careful of small screws. Smartphone designs can use screws of different lengths. Swirling a long screw into a short hole can cause a board to break down or damage the insides of the case. Sort the fasteners as you disassemble.

Frequently Asked Questions (FAQ)