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[Soldering?] Move internal memory chip

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By oles, Junior Member on 18th February 2013, 08:58 PM
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21st February 2016, 08:48 PM |#41  
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Have you checked if the data is encrypted on the NAND?
If so, after migrating the chip you will not be able to decrypt it anymore......
16th November 2016, 02:33 PM |#42  
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Lg g3 d855

My LG G3 D855 fell to the ground really hard and bottom part of the motherboard cracked, meaning that I cant use usb or screen.
I had important files on internal memory, so what way would you suggest to recover them?

AFAIK, there is 3 ways to do this and I would like to know what would be the most wise decision

1. Get identical, working phone and swap NAND chip to it.
1.1 IMEI wouldn't match, but am I able to connect phone to pc and recover files?

2. Buying JTAG box and connecting it to motherboard (I have figured out connect points)

3. Buying BGA153 adapter from ebay, removing chip from motherboard and using this adapter to connect it to pc.
3.1 Would this work? Seems like "too easy"
22nd November 2016, 01:48 PM |#43  
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Hi Kuhanzzi,

Your option 1 (including 1.1) has been discussed in this thread and should work (but will be difficult and expensive). I am suspicious about option 2 - can it work if the motherboard is cracked? Regarding option 3, I do not know anything, sorry.

24th May 2017, 04:46 PM |#44  
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what is adb shell????
i flashed my s6 edge sm-g925i msg comes pass but phone goes to boot loop.
pls help data in it is important
31st May 2017, 08:57 PM |#45  
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So guys here my opinion:

most unpractical:
Putting the chip into a different identical phone. Theoretically works, practically you have to remove a FBGA chip (which is very difficult with no damage due to the epoxy glue always present, they don't just get loose, and the heat required). That step is hard, and then it gets only harder when you want to resolder the thing - you have to clean and somehow reball and position correctly. And you should avoid damage to the "new" phone - which you have to heat twice because you have to get the original chip off. Don't attempt unless you do it for fun!

somewhat practical, but costly or really difficult and always time consuming:
unsolder chip and read in computer-attached MMC/SD reader. If you buy an adapter for about 100$ it can work, soldering the chip by hand to an sd-card adapter is a very difficult task as you don't just need connections, but also decoupling capacitors and pull-up/down resistors.

the easy way:
take your motherboard and solder simply 5 wires (DAT0, Vss, Vcc, CMD, CLK and maybe Vccq+Vssq) from an sd-card to it. That way you will get the same result as above, but without having to design your own circuits or buying an adapter. Also, the chip won't be in danger of getting damaged by heat or mechanically.
The only thing you need to do is find the points on the mainboard where to solder on to. But things like that can be found on the internet. If power is still available on the mainboard you may be able to spare the Vcc connection. That soldering will be way easier than soldering to the chip itself! This is the way to go and should always be tried first. Of course you need Emmc chips, newer phones and really old ones are different.
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9th June 2017, 09:50 PM |#46  
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Hi Molvol. Could you elaborate on "the easy way"? I am not sure if I understand correctly.
Is it removing the chip from an sd card "casing" soldering wires in casing and motherboard? Then sticking sd card in a reader with wires hanging out and read on pc like a normal sd card?
15th July 2017, 08:12 PM |#47  
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Its like a hard disk in pc u can change it but thr firmware will also change contains in it

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7th September 2018, 11:22 AM |#48  
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Use a phone's internal storage while still outside of the phone
Originally Posted by AnArChYm

Hey guys,

I know this thread is a little bit old but I'll try to give in my 2 cents maybe someone here may find it helpful

So I come from background where I do around 20 bga reballs per week, so I do know a thing or two I guess about this although my knowledge on Samsung platform is relatively low compared to an iphone logic.

So to begin with replacing the emmc chip alone is not enough as you'll need a programmer box which connects to a jtag interface which is able to rewrite the initial files like bootrom to the emmc. You can find these boxes at any prominent gsm repair shops; boxes named such as RiffBox or Z3X Samsung box are the best I found recently.

Having said that before any repair is attempted by mainly removing the flash chip it is imperative to try to resurrect the phone using these said boxes, to try to find whether or not the NAND chip is actually detected. As one may have simply installed a ROM which is not compatible with the phone and all that is required is to rewrite the bootrom files. If the NAND (basically the same name as a flash chip) fails to be detected then obviously something went wrong and it either could be the NAND is burnt inside, or the NAND has some cracks under its critical ball pins or even may be a problem that the main power management chip inside the phone is failing from supplying usually around 3V to power up the NAND.

The emmc chip at least found in a samsung is a 14 by 14 pins which only about 1/3 of it's pins are critical, the rest are dummy and do not worry if they eventually get removed, while removing the chip or cleaning the board after desoldering prior installing the new chip.

Some tips on reworking:

  • Always cover critical glued components like CPU + POP (package on package) RAM, baseband processor usually XGOLD found in Samsung.
  • Clean surrounding chip glue before attempting to remove by giving around 250C of heat and with a needle scratching the glue around
  • Do not exceed more than 350C to remove the actual chip to prevent more damage to the built in tracks inside the motherboard.

Last and not least a schematic for your phone would always be a lot of help to help you detect what voltages are missing on bootup to make sure that the boot up sequence is starting fine and also the relative points of each pin under a chip while knowing which pins are critical and which are dummies, or NC (not connected)

If you need any help you can always message me and I'll try my best to answer your questions.


Well, you seem to know quite a bit about this subject. I have a Samsung Chromebook 3 with (I think) 16gb of internal storage; along with a ZTE Blade Vantage (destroyed screen), also with 16gb of storage.
So, I was wondering; after removing eMMC from the phone, is it possible for me to use it as an external hard-drive (via USB) with my Chromebook?
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22nd February 2019, 04:49 PM |#49  
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Gửi từ G3226 của tôi bằng cách sử dụng Tapatalk
4th June 2019, 04:16 PM |#50  
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He's right , AllSocket
Originally Posted by Rebellos

While emmc chip got like 20 important pads to solder (out of even hundred, when most are there being N/C) it is still BGA. A ****ass small BGA covered with glue. That would require someone really experienced with reworking such things. I do not know the prices but I would be prepared to pay even 100$ or more for such job, done right.
That from HW level. From SW+HW look: in theory there should be no trouble with properly swapped emmc ic from other phone. But you shall not forget about the said 0.01%, maybe more - reworking such chip might have influence on its content (I might be wrong) + GS2 had the emmc hardbrick bug - how did it die?

Please let us know how did it go.

Oh and btw - there must be companies working on such data recovery with proper HW to wire up to the unsoldered chip with sort of socket or other hackaround - I'd lookup there.

AllSocket makes these devices that read Raw data from removed chips. Striaght to pc via USB 3.0

This kit fits many! (Fits Samsung s8+ for sure)
Just make sure your eMMM chip socket is listed.
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