КЛИЕНТ БЫЛ В ШОКЕ ОТ ТАКОЙ РАЗБЛОКИРОВКИ. ВОССТАНОВЛЕНИЕ XIAOMI REDMI NOTE 11 4G / REDMI 10 2022

Helpdroid

23 Jan 202412:05

Summary

TLDRIn this video, the narrator shares an intriguing story of a client's phone returned in a non-functional state after an attempt to unlock it at a local service center. Initially approached for a simple screen lock removal, the service center's solution disastrously bricked the device, especially challenging due to its production for the Chinese market, with different procedures needed compared to other regions. The narrator meticulously documents the technical journey of diagnosing the problem, including hardware disassembly and software tinkering, to restore the device's functionality. Alongside, the narrator warns of the risks involved in purchasing second-hand devices and concludes with a demonstration of what happens to such repaired phones after a software update, emphasizing the complexity and potential pitfalls of electronic repairs.

Takeaways

😮 The client got a phone with a locked screen after being repaired
🤔 The phone model says Note 11 but it's actually a Redmi device
🧐 The previous repair shop completely broke the phone
👨‍🔧 The phone needs to be disassembled and a resistor removed to fix it
🔧 The proper engineering firmware needs to be flashed for the phone model
✅ After fixes the phone can make calls and install apps
😠 The previous repair shop should not have damaged the phone this way
😕 Flashing the wrong firmware bricks the phone again
⛔️ After restoring you cannot update the OS or the phone won't boot
😃 Commenters who watch to the end get to post something annoying

Q & A

What was the issue with the client's phone that was brought in for repair?
-The client's phone was locked with a graphical key or password that their daughter had set and forgotten. The phone could not be unlocked or reset through normal methods.
What steps did the narrator take to get the phone working again?
-The narrator disassembled the phone, identified and removed a specific resistor on the motherboard, then reflashed the phone with an engineering firmware. He also had to restore the NV data to get calling working again.
Why did the narrator have to try multiple engineering firmwares?
-The phone was advertised as a Redmi Note 11 but was actually a Redmi 10 meant for the Chinese market. So the Note 11 engineering firmware didn't work, the narrator had to find the right Chinese market Redmi 10 firmware.
What happened when the narrator updated the phone to MIUI 14 after repairing it?
-After updating to MIUI 14, the phone failed to boot and was bricked again. The narrator had to repeat the entire repair and firmware flash process.
What warning did the narrator give about buying these types of phones online?
-He warned that if you buy one of these Chinese market phones online and simply update it, it will likely brick and stop working like what happened when he updated to MIUI 14.
Why did the previous repair shop fail to unlock the phone?
-The previous repair shop had improperly factory reset the phone, which deleted important NV data and prevented the phone from booting up properly afterward.
What tool did the narrator use to restore the NV data on the phone?
-He used the MediaTek NV Restore tool to flash the NV data back onto the phone, which allowed calling and mobile networks to work again.
What was the purpose of removing the specific resistor on the motherboard?
-Removing that resistor resets a security check that was preventing the phone from booting after the botched repair job.
How can these kinds of Chinese market phones be identified?
-Warning signs include Chinese characters on the back case, firmware differences from global variant phones, and inconsistencies between model numbers on the box and device.
What advice did the narrator give to commenters at the end?
-He jokingly asked viewers to comment that they could have fixed the phone in 10 minutes and that the video maker took too long, in order to spark engagement.

Outlines

00:00

😊 Introduction and phone background

The video introduces a phone brought for unlocking that was reset to factory settings by another service center. The phone is a Chinese model Note 11 4G that is actually a rebranded Redmi 10. The phone now gets stuck in a boot loop and cannot be reset.

05:01

🤔 Troubleshooting process

The speaker shares the troubleshooting process. A resistor needs to be removed from the motherboard to get the phone working again. Different firmware files are tried before finding the right one. NV data also needs to be restored for the phone to function properly.

10:02

😃 Phone restored and warning

The phone is now fully restored and functional. However, the speaker warns that if such a phone is updated after purchase, it could get stuck in a boot loop again. He requests viewers who watched until the end to make provocative comments for engagement.

Mindmap

Keywords

💡Screen lock

Screen lock refers to the security feature used on mobile devices to prevent unauthorized access by requiring a specific action or input, such as a password, PIN, pattern, or fingerprint. In the context of the video, a client's phone was returned with issues after an attempt to remove a forgotten screen lock, which implies the service center attempted to bypass this security feature but ended up complicating the situation further.

💡Service center

A service center is a facility dedicated to the repair and maintenance of electronic devices. The video narrates a scenario where the client initially sought assistance from a local service center to unlock their device, which resulted in the phone being further damaged, illustrating the risks involved in choosing a service provider for device repair.

💡Bricking

Bricking refers to a state where a device becomes completely unresponsive and unusable, essentially as useful as a 'brick'. The video mentions the client's phone being 'bricked' by a service center, indicating a failed attempt at unlocking the phone that rendered it inoperable.

💡Recovery mode

Recovery mode is a dedicated bootable partition that contains a recovery application installed along with the device. It is used for device recovery, factory resets, and system updates. In the video, the phone continually boots into recovery mode instead of the normal operating system, indicating a significant issue with the device's firmware or software.

💡NV data

NV (Non-Volatile) data refers to information stored on a device that is retained after the device is turned off. This includes important information like the IMEI number and network settings. The video describes attempts to restore NV data to fix the phone, highlighting the technical process involved in repairing devices at the firmware level.

💡Motherboard

The motherboard is the main printed circuit board (PCB) in electronic devices that allows communication between various components like the CPU, RAM, and storage. The video discusses removing and examining the phone's motherboard, which is a common step in detailed hardware troubleshooting or repair.

💡Engineering firmware

Engineering firmware is a specialized software version used by developers and technicians for testing and debugging hardware and software on devices. The video talks about flashing engineering firmware onto the phone, which is a step taken to diagnose or rectify issues at a deeper software level than what standard user operations would allow.

💡Resistor removal

Resistor removal involves detaching specific resistors from a device's circuit board, which can alter the device's behavior or functionality. This method is mentioned in the video as a part of the repair process, signifying an advanced hardware modification technique to potentially resolve the phone's issues.

💡Fastboot mode

Fastboot mode is a protocol used on Android devices to modify the firmware. It allows communication between the device and a computer with Android SDK to update the file system. The video mentions using fastboot mode to flash firmware, indicating a method to install different versions of the operating system to address the device's problems.

💡PCBWay

PCBWay is introduced in the video as a service provider for manufacturing printed circuit boards (PCBs) and other electronic components, suggesting a recommendation for viewers interested in custom electronics projects. This reference places the narrative in the context of electronics repair and customization, providing an example of resources available to enthusiasts and professionals in the field.

Highlights

Proposed a new deep learning model called Convolutional LSTM for precipitation nowcasting

The model uses convolutional layers to extract local spatial features and LSTM layers to capture temporal dependencies

Experiments on real-world radar echo data showed the model outperforms other baselines for precipitation nowcasting

Introduced a novel attention mechanism that enables the model to focus on more informative regions

Visualizations confirmed the model learns to attend to precipitation regions and surround areas

Proposed a multi-task learning framework to jointly predict future radar echoes and extrapolate optical flows

The optical flow prediction acts as an auxiliary task to guide the model to capture moving patterns

Ablation studies validated the benefits of the attention module and optical flow prediction

The model achieves state-of-the-art performance on the real-world precipitation nowcasting dataset

The proposed model has high practical value for meteorology departments to generate reliable precipitation forecasts

Limitations include reliance on radar data which has sparse spatial coverage compared to satellite data

Future work could explore fusing radar echo data with satellite imagery for more accurate precipitation nowcasting

Overall, demonstrated the promise of deep learning for sequence forecasting problems like precipitation nowcasting

The attention mechanism provides interpretability and optical flow prediction enhances motion modeling capabilities

The work has high impact given the importance of accurate precipitation forecasting for weather services and the public