How to remove the back cover Xiaomi Redmi 9A: a full guide with photos and tips

Removing the back cover of the Xiaomi Redmi 9A is the first step to replace the battery, speaker or other internal components. But without the right approach, it’s easy to damage a fragile plastic case or break plumes. This article will help you understand how to open your smartphone safely, what tools you will need and what to look for, so as not to turn a simple repair into an expensive one.

The Redmi 9A (codenamed dandelion) has a glue-like lid design that makes it harder to remove than screw enclosures. We will discuss two methods in detail: using a suction cup and a mediator (for beginners) and a heating method (for advanced users), and you will learn how to avoid the typical errors that lead to cracks in the lid or damage to flexible plumes.

Training: tools and materials

Before you start disassembling, make sure you have everything you need, and even one tool that you don't have can damage the body or the internal components, and here's the minimum set:

• 🔧 Plastic mediator (or guitar mediator) – to separate the cover and body without scratches.
• 🧲 Suction cup (preferably with metal ring) – helps create an initial effort to detach.
• 🔥 Hair dryer or thermo-air station - for softening the glue (temperature not higher than 60)°C!).
• 📦 Container for screws – so as not to lose small parts (if you plan to completely disassemble).
• 🧴 Isopropyl alcohol 90%+ — To clean glue residues (do not use acetone!).

If you don't have specialized tools, you can do with the tools at hand: instead of a mediator, a plastic card will do, and instead of a sucker, a tape tape folded with a loop, but the risk of damage to the body in this case increases by 2-3 times.

⚠️ Warning: Do not use metal tools (knives, screwdrivers) to separate the lid! Even a small scratch on an aluminum frame can become a hotbed of corrosion and lead to loss of leakage.

Method 1: Removal of the lid with a suction cup and a mediator (for beginners)

This is a way for people who are first-time smartphone users to take their hands off, it requires less skill, but it takes longer, and the rule of thumb is to take your time and move smoothly.

1. Turn off Redmi. 9A and extract SIM-This will prevent the contacts from accidentally closing.
2. Stick the suction cup on the bottom of the lid (near the USB-C connector). Make sure it fits tightly.
3. Carefully pull the suction cup upwards, creating a small gap between the lid and the body. Insert a mediator into it.
4. Slowly move the mediator along the edge of the smartphone, separating the lid, and the characteristic crackling starts, and the glue bursts.
5. Once the lid is 2 to 3 mm apart around the perimeter, remove it completely. Don't pull the corners, there are plumes going through!

If the lid is not resistant, do not apply excessive force. It is better to repeat the procedure with heating (described in the following method). The glue on the Redmi 9A is often applied unevenly, so some areas may require additional effort.

Is the smartphone off? |

Whether extracted SIM-map?|

Is there a mediator and a sucker at hand?|

Is the body heated (if the glue is too strong)?-->

Method 2: Heated disassembly (for power users)

The thermal method speeds up the process, as the glue becomes elastic when heated to 50–60°C. However, it is important not to exceed the temperature of 70°C here, this can damage the battery or screen. Use an infrared thermometer for control.

Algorithm of action:

1. Heat the back cover with a hair dryer for 2-3 minutes, evenly leading the air jet around the perimeter. Keep the hair dryer at a distance of 10-15 cm.
2. While the lid is warm, press the suction cup and pull it up. The glue should give in more easily.
3. Insert the mediator into the gap and lead it along the edge, as in the first method.
4. If the glue cooled and again "captured", repeat the heating.

⚠️ Warning: Do not heat the area near the camera and connector USB-C — It's got thermal pastes and sensitive components, and it's best to heat only the edges of the lid.

Common Mistakes and How to Avoid Them

Even with careful disassembly, you can make mistakes that will lead to breakdown, and here are the most common ones and ways to prevent them:

• 🔋 Battery plume damage occurs when you pull the lid on the top corner. Always start at the bottom!
• 🔊 The speaker breaks, the speaker is glued to the cover, and if you forget to disconnect the connector, it will come off.
• 📱 Cracks on the cover – occur when using metal tools or excessive pressure.
• 🔥 Battery overheating – if you heat the case for longer than 5 minutes, the battery may swell.

If you hear a crunch or crackle when removing the lid, immediately stop disassembling and check the integrity of the plumes. Most often, the plume of the display or fingerprint scanner suffers (if it is installed under the lid).

What to do after the lid is removed?

When the lid is finally removed, you'll see the inside of the smartphone, and here's what you can do next:

• 🔋 Battery replacement is the most popular repair. - Battery at Redmi 9A glued, so it also needs to be heated or use a special glue-separator.
• 🔊 Cleaning speaker - dust and dirt often accumulate under the net. Use a soft brush or compressed air.
• 📶 Replacement of antenna tapes – if the network signal deteriorated, antenna contacts may have moved away.
• 🛠️ Check plumes – inspect flexible plumes for ruptures or oxidation.

If your goal is to replace the battery, remember that the new battery must be original or from a proven manufacturer (such as ZMI or Baseus). Cheap counterparts often have lower capacity and can swell in 2-3 months.

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Before assembling the smartphone, wipe the inside of the cover and the body with alcohol - this will remove the remains of glue and improve tightness.

How to reassemble the smartphone back?

Building the Redmi 9A after repair requires as much care as disassembling.

1. Make sure all plumes are connected and not bent. Pay special attention to the plume of the display and battery.
2. If you have used alcohol for cleaning, let the parts dry for 10-15 minutes.
3. Apply new glue around the perimeter of the case (you can use double-sided tape with a thickness of 0.2 mm).
4. Carefully press the lid, starting at the bottom, make sure it sits smoothly, without skewing.
5. Fix the cover with tape around the perimeter and leave the smartphone under load (for example, a book) for 1-2 hours.

Once built, turn on your smartphone and check all the functions: sensor, camera, speaker, charging. If something doesn't work, take your smartphone apart again and check the connections.

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If the smartphone does not turn on after assembly, first check the connection of the battery plume and power button. In 80% of cases, the problem is in these.

FAQ: Frequent questions about the Xiaomi Redmi 9A disassembly