First of all, we come to the beginning of the story. This is a broken phone that the editor found on the roadside. The first thing is gone. A bare motherboard. Okay. This is a motherboard that can’t be turned on. Only one motherboard is left. Circuit board of broken mobile phone repaired by others
See the key Samsung eMMC flash memory chip, the chip is 16GB memory, that is to say, this mobile phone is a mobile phone with a built-in 16GB memory space.
The data is stored in it, called the font library in the iPhone
The eMMC chip from Samsung, model KLMAG2GE4A-A001, 16G capacity, belongs to eMMC 4.41, 169-ball BGA package
Remove the heat gun, the temperature should not be high, it is easy to explode
Since the chip's pad is very small, a very thin wire is required for soldering. Here, a copper wire in the headphone cable is used.
The eMMC chip is simply a flash memory chip integrated with the controller. To put it simply, it can be used through a card reader, similar to a memory card. At this time, you need to connect the corresponding pins on the chip to the card reader. On the device, below is the pin diagram of the chip, we need to connect DAT0, DAT1, DAT2, DAT3, CLK, CMD, VCC, GND to the corresponding pins of the card reader
Connect the font library to the card reader according to the pin map
Reader pin principle
Remove the card holder of the card reader, and then connect the wire from the chip to the pad of the card reader according to the pins of the memory card to install it.
Plug the card reader into the computer, the computer can recognize it, indicating that the chip wiring is not wrong, you can see a total of 9 partitions, of which the first 8 are Android partitions, used to store Android system data, virtual memory partitions, etc. , The one with a total of 11.26GB in the back is the user partition, which is the place for you to store the data. Now, restore the data on this 12G partition
Read out the data through modification
After restoring some photos, I won’t post them; I helped her destroy all the remaining data, deleted all the partitions, and used it as a U disk
Data recovery conclusion:
This bad circuit board is from a Sony Ericsson phone
The owner is a student at Guilin XXX College
This cute girl may already be working now, maybe she or her company is in XXX
Did you get a cold sweat after watching it? This time only the data of part of the photo type is restored. If all the data is restored and analyzed, it is estimated that even your QQ friends, the phone number in your phone book, the content of the text messages, etc. will be restored.
In this case, what if you want to sell your mobile phone to others, and you are worried that others will restore your mobile phone data and leak your privacy? This is simple. We can overwrite the data so that it can’t be restored. The method is very simple. Save the movie in your phone. If you can’t store it, you can store MP3. If you can’t store MP3, you can store the text file. , All data areas are covered by the data you downloaded, so no matter how powerful the recovery software is
Finish~
Note: The purpose of this post is to tell everyone to protect their privacy. If there is a bad one or resell another person’s mobile phone, you should pay attention to destroying the data. It will not take a long time, but it can protect your private data to a certain extent. . In order to protect the privacy of the original owner, this article has mosaiced the key parts of the photos and restored all the data of the memory card. Only a few photos have been restored, used for tutorials, and not used for other purposes, and the original files deleted.
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