Your Xiaomi Redmi Note 4 has been underwater, in a puddle or fallen down the toilet? Don't panic - even after contact with liquid, the phone has a chance of salvation if you act quickly and correctly.This model, released in 2017, has no official water protection (IP-certification), but its design allows you to restore efficiency with a competent approach.
The biggest mistake most users make is to try to turn on the phone right away to check if it works, and 90 percent of the time, it shortcuts and causes permanent damage to the motherboard, and in this article, we've got a clear algorithm to help minimize damage and increase the chances of a successful repair, and we'll figure out what to do in the first few minutes, how to properly disassemble and dry the device, and when to go to the service center.
Note that even if the phone is turned on after drying, the effects of water can manifest later in the form of contact corrosion, battery problems or accidental reboots. So it is important not only to save the Redmi Note 4 here and now, but also to prevent long-term breakdowns.
First steps: what to do immediately after water hits
If the Xiaomi Redmi Note 4 sinks or a liquid spills over it, follow this algorithm:
- 🚨 Remove your phone from the water immediately – the longer it stays in the liquid, the higher the risk of corrosion.
- ⚡ Turn off the power if the phone is still working. Don't press the power button if the screen is out!
- 🔌 Disconnect all cables (charging, headphones, OTG) — This will prevent short circuiting.
- 📱 Get it. SIM-card and memory card - they can interfere with drying and themselves suffer from moisture.
Don't shake your phone, blow into connectors, or dry with a hair dryer — these are common myths that will only make things worse. Also, avoid heating: high temperatures can warp your screen or damage your battery. If the liquid wasn't water, but a sweet drink, salt, or soap solution, rinse your phone with distilled water (ordinary tap water contains impurities that accelerate corrosion).
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If you don't have distilled water on hand, you can use boiled water that's cooled to room temperature, and the key is not to use tap water.
Once removed from the liquid, don't turn on the phone, even if it looks dry, moisture could have penetrated through a microphone, speaker or button, and it can't be seen from the outside, and the next steps depend on how badly the machine was damaged.
Disassembly Xiaomi Redmi Note 4: how to get the battery and the fee
To dry the phone as efficiently as possible, you have to disassemble it, so you can get to the internal components where the moisture accumulates, and if you've never taken a smartphone apart, you'd better leave it to the professionals, but you can do it yourself with care.
You'll need:
- 🔧 Plastic blade (or mediator) for putting the cover.
- ⭐ Cross screwdriver (usually suitable) PH00).
- 🧲 Magnetic substrate or screw box (so as not to lose).
- 🔥 Fryer with cold blown (optional, to accelerate drying).
Step-by-step:
- Remove the back cover by shoveling it around the perimeter. On the Redmi Note 4, the lid is attached to the latches, but be careful - it's fragile!
- Unscrew all the screws that hold the metal plate above the battery.
- Carefully disconnect the battery plume from the motherboard (use a plastic shoulder blade to avoid damaging the contacts).
- Remove the battery - it may be glued, so tuck it on the side.
- Unscrew the screws holding the motherboard and get it out.
Is the battery plume disconnected?|Is the metal plate removed?|Is there any visible corrosion on the board?|All screws are stacked separately-->
If you notice white plaque or green spots on the board, these are signs of corrosion, in which case self-drying may not help, and you should contact the service immediately. Also pay attention to the moisture indicator (usually a red or white sticker under the battery), if it turns red, this confirms that liquid enters, and the warranty on the phone is no longer valid.
How to Dry Xiaomi Redmi Note 4 After Water
The most reliable way to dry is to leave your phone unassembled for 24 to 48 hours in a dry, warm place, but there are some things that will speed up the process and reduce the risk of damage.
What NOT to do:
- 🔥 Drying with a hair dryer in hot air – this can melt the screen or damage the battery.
- 🍚 Burying rice in rice is a myth, because rice doesn't absorb moisture from inside your phone, and it can get into connectors.
- ☀️ Put under direct sunlight - overheating will accelerate corrosion.
- 💨 Blowing your mouth into connectors – saliva contains salts that will make the situation worse.
Proper drying methods:
- Use silica gel (packages of shoeboxes or electronics) and put your phone and bags in a sealed container for 12 to 24 hours.
- Apply a cold blower (if you need to speed up the process) Keep the hair dryer at a distance of 20-30 cm from the board.
- Place your phone in a ventilated area with a temperature of 20-25°C. Avoid drafts.
- To accelerate drying, you can use an ultraviolet lamp (if any) - it helps to evaporate moisture.
| Drying method | Time. | Efficiency | Risks. |
|---|---|---|---|
| Silicagel in a container | 12-24 hours | ⭐⭐⭐⭐⭐ | No. |
| Natural drying (disassembled) | 24-48 hours | ⭐⭐⭐⭐ | Corrosion at long humidity |
| Fen (cold air) | 1-2 hours | ⭐⭐⭐ | Overheating with carelessness |
| Rice or other absorbents | 24+ hour | ⭐ | Dust, inefficiency |
After drying, take your time to collect the phone. First check the corrosion charge. If you have one, gently clean it with alcohol solution (90%+) Do not use acetone or other aggressive solvents!
rhysom|silicagel|Phenem|In a natural way (just left to dry)|I didn't dry, I was just in service.-->
Checking the performance after drying
If the phone is dry, it's time to see if it was saved, but even here there are risks that turning it on incorrectly could nullify all efforts.
How to test correctly:
- Get your phone together, but don't plug the battery in right away. First, check if there's any visible damage on the board.
- Connect the battery and try to turn on the phone without SIM-memory-cards.
- If the phone is on, check it out: 📶 Network operation (calls, mobile Internet). 🔊 Sound in the speaker and microphone. 📸 Chamber (front and main). 🔋 Charging (connect the charger).
Signs that the phone is not completely dry:
- 🔄 Self-involved reboots.
- 🔋 Fast battery discharge.
- 📱 Some sensors (gyroscope, proximity sensor) do not work).
- 🎵 Distorted sound in a speaker or microphone.
What if the phone is turned on but the screen is not working?
If the phone doesn't turn on at all, don't panic.
- The battery is empty (try charging it separately).
- Short circuit on the board (diagnosis is needed).
- Bootloader is damaged (in rare cases).
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If the phone turns on after drying, but after a few days it starts to glittle, this is a sign of hidden corrosion, in which case professional cleaning of the board in the service is required.
When to contact the service center: signs of serious damage
Not all breakdowns after water can be repaired by yourself, if you notice at least one of these symptoms, it is better to entrust the repair to specialists:
- 🔥 The smell of burning when turned on - a sign of a short circuit.
- 💥 Bloated battery – it needs to be replaced urgently!
- 🔌 The phone is not charging or discharges quickly.
- 📡 No net (no nets) SIM-map).
- 🖥️ Artifacts on screen (strips, flickering).
The service center will conduct:
- 🔬 Ultrasonic cleaning of board against corrosion.
- 🔧 Replacement of damaged components (circuits, capacitors).
- 🔋 Diagnostics of the battery and its replacement if necessary.
- 📱 Checking all modules (camera, speaker, microphone).
The cost of repairing Xiaomi Redmi Note 4 after water depends on the degree of damage:
- Cleaning fees - from 1,500 to 3,000 rubles.
- Replacement of the battery - about 1000-1 500 rubles.
- Repair / replacement of the screen - from 2,500 to 5 000 rubles.
- Replacement of the motherboard is 5 000-8 000 rubles (sometimes it is cheaper to buy a new phone).
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Before you bring your phone to the service, back up your data if it's still on. After repair, the information may be lost!
If you decide to repair your phone yourself, be prepared for the fact that some parts (such as plumes or chips) will have to be ordered separately. For the Redmi Note 4, parts are still available, but their quality may vary. Buy components only from trusted sellers.
How to Prevent the Effects of Water Infection in the Future
Even if you managed to save the Xiaomi Redmi Note 4, the risk of water re-entry remains. To minimize future damage, follow these tips:
- 🛡️ Use a waterproof cover (such as Spigen or Spigen). UAG).
- 🚿 Avoid using your phone in the bathroom or in the rain.
- 🔋 Do not leave your phone on charge in wet areas.
- 📦 Store silica gel in your phone bag (it absorbs moisture from the air).
- 🔄 Check your water indicators regularly (if any).
If you are often in high humidity (such as exercising or working outside), consider buying a phone with protection. IP67/IP68. Among Xiaomi models, such protection is provided by, for example, Xiaomi. 13 pro POCO X5 Pro.
It is also helpful to know what to do in an emergency:
- If the phone falls into salt water (sea, ocean), wash it with distilled water as quickly as possible - salt accelerates corrosion.
- If the phone falls into a beer or soda, rinse the board with an alcohol solution (vodka or isopropyl alcohol 90%+).
- If the phone has been in the water for more than 30 minutes, the chances of recovery drop sharply - immediately bring it to the service.
Frequent mistakes in rescuing a drowned phone
Many users make the same mistakes when trying to save the Xiaomi Redmi Note 4 after water.
- ❌ Turning the phone on immediately after being removed from the water - this leads to a short circuit.
- ❌ Drying your phone in the microwave is guaranteed to kill you.
- ❌ Using a vacuum cleaner – it can damage the microphone or speaker.
- ❌ Locking your phone in a sealed bag of rice creates a greenhouse effect.
- ❌ Self-soldier board without experience - you can damage the tracks.
Another common mistake is ignoring hidden damage: the phone can run normally for a week or even a month, but then suddenly stop turning on due to corrosion. If you rescued the Redmi Note 4 after water, watch it for 2-3 weeks:
- Check if the battery is warm.
- Keep an eye on the battery life.
- Test all functions (camera, speaker, sensors).
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If more than 48 hours have passed since the water hit and the phone still doesn't turn on, don't waste time on further drying, and the longer the moisture stays inside, the greater the risk of permanent damage.
If you are not sure of your abilities, you should contact the service immediately, for example, in official Xiaomi centers (if the phone is warranty, but the moisture indicator did not work) or in trusted workshops. The average cost of diagnosis is about 500 rubles, which is cheaper than buying a new phone.