How to disassemble Xiaomi Redmi 9A: remove the back cover without the risk of breaking the phone

Have you thought about repairing the Xiaomi Redmi 9A yourself? The first obstacle is the sealed back cover, which seems monolithic. Many users are afraid of damaging the latches or the screen when they try to open it. In fact, the process is no more difficult than replacing the battery in the remote control, if you know the nuances of the design and use the right tools.

This guide will help you avoid the typical mistakes, from broken clips to damaged battery plume, and we'll look at three methods, from the classic mediator to alternatives for those who don't have specialized devices. 9A It is more difficult to understand than the flagship models of Xiaomi, and how to get around it.

If you've never taken a smartphone apart, practice on an old phone or watch a video disassembly. The Redmi 9A has fragile plastic perimeter latches that are easy to break when you press it sloppy, but don't worry, with the right approach, the risk is minimal.

Preparation: What you need to safely open the lid

Before you start disassembling, assemble the tool you need, and without it, you risk scratching the body or damaging the internal components.

• 🔧 The plastic mediator (or guitar mediator) is the main tool for uncoupling the lid!
• 🔥 A hair dryer or a thermo-air station to soften the glue (if the phone hasn't been disassembled before), even a household hair dryer at maximum temperature will do.
• 📱 Suction cups help lift the lid after warming up. You can use a suction cup for car windows.
• 🔍 A magnifier or magnifying glass, so you can see the microgaps and the latches, and it's especially useful for beginners.
• 🧴 Isopropyl alcohol (90%+) — cleansing.

If you don't have a mediator, you can replace it with a plastic card (bank or discount), but it should be flexible enough. The main rule is: don't use metal objects - they conduct current and can close the board when you move carelessly.

Also prepare the workplace:

• 🪑 Work at a table with good lighting.
• 🧹 Remove all small items – cogs and details are easily lost.
• 📱 Turn off the phone and remove it. SIM-card with memory card (if any).

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Before disassembling, take a photo of the back cover of the phone - this will help to properly collect it back if the latches have an asymmetrical location.

Method 1: Classical disassembly with a mediator (recommended method)

This method is suitable for most users and is minimally risky.

1. Warm up the cover. Turn the dryer on at maximum temperature and warm up the back panel for 2-3 minutes, holding it at a distance of 10-15 cm. The glue will become softer, and the cover will come off easier. Don't overheat! - enough to make the body warm to the touch.
2. Suction cup. Stick the suction cup closer to the bottom edge of the phone (where the charging connector is) and pull up slightly. There should be a slight gap.
3. Mediator: Put a plastic mediator in the gap, and carefully steer it along the edge, disengaging the latches. Redmi 9A has particularly complex areas, near the volume buttons and the camera.
4. Clicking. Once you've walked around the perimeter, the lid should be easy to remove. If it resists, warm up the problem areas again.

The important thing is, on the Redmi 9A, the battery plume is glued to the lid. Don't pull it out, first, unplug the plume with a flat screwdriver.

Warm up the hair dryer cover for 2-3 minutes |

Connect the suction cup at the charging connector |

Carefully insert the mediator into the gap |

Click the latches around the perimeter |

Disconnect the battery plume before the lid is completely removed-->

⚠️ Attention! If the lid doesn't respond after warming up, don't use too much force. You probably missed the latch or the glue didn't soften enough. Re-heat again.

Method 2: Alternative method without mediator (for emergency cases)

If you don't have a plastic mediator on hand, you can do with the tools you need, and this is a very careful method, but it also works.

• 💳 Use a flexible plastic card (such as a store club card) and trim the edge at an angle of 45.° convenienceally.
• 🧊 If there is no hair dryer, put the phone in a bag of warm water (40-50°C) on 5 It'll soften the glue, but it won't hurt the electronic components.
• 🔊 Start at the corner near the speaker, there are usually fewer latches. Carefully draw the map and lead along the edge.

The main disadvantage of this method is that it is very likely to scratch the case, and if the phone is new, it is better to wait for the mediator to buy.

Another life hack: if the lid is very tightly glued, you can use a thread or a toothpick, warm up the edge of the phone, insert the thread into the gap and gently saw it back and forth, as if you were cutting cheese, which is slow but safe for latches.

Common Mistakes and How to Avoid Them

Even experienced users sometimes make mistakes when disassembling the Redmi 9A. Here are the most common ones and ways to prevent them:

It's especially dangerous to push the camera area, because there's a fragile lens that's easy to damage, and if the lid doesn't lend itself, it's best to pause and warm up the problem area again.

⚠️ Attention! On some Redmi batches 9A (Especially in the early releases, the glue was applied unevenly. If you feel that the lid is "stammered" in one place, do not try to tear it off by force - use additional heating or alcohol to dissolve the glue.

What to do after successfully opening the lid

Congratulations! You successfully removed the back panel, but that's only half the story.

• 🔋 Battery. If you're planning to replace it, first disconnect the plume from the motherboard. Use plastic tweezers or a mediator.
• 📸 The camera and the plumes. Don't pull the plumes, they're fragile. If you want to take the camera off, gently tuck it in from the side.
• 🧲 Speaker and microphone. 9A They're glued to the lid. Be careful when cleaning the glue.

If your goal is to replace the battery, consider that the new battery may not have adhesive backing, in which case use double-sided tape or a special glue B-7000 for fixation.

To clean the insides of the phone from dust, use a soft brush or a can of compressed air. Under no circumstances blow with your mouth - moisture from the breath can damage electronic components.

Phone Assembly: How to Put Everything Back in Place

Putting the Redmi 9A back together is often harder than disassembling.

1. Check the latches. Make sure all the plastic clips are in place and not broken. If any are missing, the phone won't close tightly.
2. If you use a new glue, just put it in a thin layer around the edges, and the excess can get on the board.
3. Press evenly. When you build, press the lid around the perimeter, not in the center. Start with the charging connector.
4. Check. After assembly, turn on the phone and make sure all functions are working (camera, speaker, sensor).

If the cover does not fit tightly, the reasons may be as follows:

• The latch is broken, and the cover will need to be replaced.
• Not enough glue - add it and press the lid with a load for 10-15 minutes.
• Dust or debris – take the phone down again and clean the surfaces.

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After assembly, allow the phone to "rest" 1-2 hours before turning on, this will allow the glue to permanently freeze and prevent the internal components from moving.

When is the best time to contact the service center

Despite the apparent simplicity, there are situations when it is better to trust the disassembly to professionals:

• 🔧 If you already broke the latches on the first attempt, further disassembly can aggravate the problem.
• 💧 If the phone was in water, corrosion could appear inside, and self-disassembly will lead to a short circuit.
• 🔋 If the battery is swelling, it's dangerous! Bloated batteries can ignite if damaged.
• 📱 If the phone is warranty, a self-disassembly will cancel it.

The cost of dismantling in a service center usually does not exceed 500-1000 rubles, which is cheaper than repairing after a failed self-attempt. For example, replacing a broken latch or plume can cost 1500-3000 rubles.

If you decide to take your phone apart, but something goes wrong, don't panic. Most of the damage is repairable.

• The ragged plumes.
• Oxidation marks on the board.
• Cracks on the screen or body that were not before the disassembly.

FAQ: Frequent questions about the Xiaomi Redmi 9A disassembly