reverse engineering to find emmc problems - GSM-Forum

tukara · 11-21-2014, 17:34

hello gurus. I've been reading this section and I'd like to know if there is any way to use the reverse engineering to find problems on cell phones when there is baseband unknown after imei repair. it should be one way to know if after the imei repair the box caused damaged to the emmc or baseband ic or if is it just there are some partition corrupted.
if that is possible could someone post here how to do it. thanks in advance.

BR
Tukara

..::SuB::.. · 11-23-2014, 11:40

what do you want to reversing? it is already clarified by others.

tukara · 11-23-2014, 14:55

Thanks for reply. Well I think I read all post here and I haven't find anything about how yo find problems reversing but let me try to explain what I want. Sometimes samsung phones get the baseband damaged when we are trying to repair the Imei with boxes. Sometimes the wifi or bluetooth get damaged too. I'd like to know how can I know what 's exactly happening with the phone and how to solve it if it possible. I think if i know how to apply the reverse engineering to a damaged phone i can determine if the phone has hardware or software problem.

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SamsungAsia · 11-23-2014, 22:58

some kind of exe made thru delphi vb and it contains manual guide's?

psytr0nic · 11-26-2014, 12:47

according what I read here imei isn't related to emmc issue ..
but by BAseband Ic ( CPu & nand ) .. Im I wrong big bro's ?

tukara · 11-26-2014, 14:28

Well i read that too. But some jtag box support told me that i have faulty eMMC so I really dont know what to do now. That why I'm asking here to get answers or at least links to read, read, read.

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psytr0nic · 11-26-2014, 15:20

yur phone model ?

tukara · 11-28-2014, 16:32

Samsung sgh-t999, sgh-i747, m919, i337. I've seen this problem on samsung phones S version and note version.

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KE6SOLTI · 11-29-2014, 14:53

if modem(bb chip) is working then you can see imei on screen, emmc is damage or working does mot matter.i have repair lot of phones in this case by hardware.i face much type of problams. so we cant sure that problam is in emmc.

duncan99 · 11-29-2014, 15:43

Quote:

Originally Posted by KE6SOLTI

if modem(bb chip) is working then you can see imei on screen, emmc is damage or working does mot matter.i have repair lot of phones in this case by hardware.i face much type of problams. so we cant sure that problam is in emmc.

Bro i have many many problems like that.
which after efs reset,modem write e.t.c. the baseband still remains like that.
i have i9300,N7100,i9500,i9505 e.t.c that has that kind of problem.i know its hardware which can caused by baseband ic, but my problem is that i dont know how to fix it.
Please help me bro cause i have been looking for someone that will help me out in this problems for so long.
where is the baseband ic located on this devices?
can it be caused when the baseband ic loses voltage?
do i rehot,reball or replace when i encounter such problems?
if i dont have the schematic of the phone e.g i747. what is the characteristics that i will use to know a baseband i.c by just looking at it?
Thanks in advance

tukara · 11-30-2014, 12:29

Quote:

Originally Posted by KE6SOLTI

if modem(bb chip) is working then you can see imei on screen, emmc is damage or working does mot matter.i have repair lot of phones in this case by hardware.i face much type of problams. so we cant sure that problam is in emmc.

Hello thanks for reply bro. I'm in the same boat as duncan99. As I know there is not baseband chip in some samsung model because of the processor, modem, memory combination. The reason why I started this threat is to try find the way to test the damaged ic (in some case the processor) before to try to reball it or replace it. You have some info about it or you how to fix it please post it here. Thanks in advance.

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tukara · 12-11-2014, 02:12

Hello nobody here could help me please?

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**Victor** · 12-11-2014, 06:47

Quote:

Originally Posted by tukara

Hello nobody here could help me please?

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Realy I not want dissapoint yoy but "Reverse Engineering" is not piece of cheese. How you expect help? Better is to try contact with supplyer of your equipment to discuss how kill emmc and possible way to repair.

tukara · 12-12-2014, 03:43

Hello thanks for reply. They wont say anything. I think if some people learned reverse engineering why i cant?. 2 years ago i didnt know anything about repair, unlock, flash cell phones. I just want to go deepest in repairs and think Reverse Engineering is the best way. I hope some master here could help me on it.

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ecs87 · 12-12-2014, 03:58

No one is going to hold your hand through this. I was fortunate to have dest give me a pointer or two, but he left me to my own devices. I didn't ask repetitive questions, I did a lot of my own research and in the end I learned no one is going to hand feed you. The information is out there. If you're begging for it, then your effort is being wasted. 99% of your time should be spent researching. 1% of the time should be other tasks (including asking direct questions). So for every 99 pdf documents (github code, .jar code, .apk code, dissecting libraries, going through ARM code, etc.) you've read over relevant material...You get one question. This isn't college. You're hacking into proprietary software where the bugs and patches aren't readily available publically. There is no book or professor; you have to learn by yourself and teach yourself (i guess it's similar to online schooling? Lol).

11-21-2014, 17:34	#1 (permalink)
tukara Freak Poster Join Date: Aug 2011 Posts: 290 Member: 1633328 Status: Offline Thanks Meter: 37	reverse engineering to find emmc problems hello gurus. I've been reading this section and I'd like to know if there is any way to use the reverse engineering to find problems on cell phones when there is baseband unknown after imei repair. it should be one way to know if after the imei repair the box caused damaged to the emmc or baseband ic or if is it just there are some partition corrupted. if that is possible could someone post here how to do it. thanks in advance. BR Tukara

11-23-2014, 11:40	#2 (permalink)
..::SuB::.. No Life Poster Join Date: Aug 2008 Location: The Matrix :) Age: 36 Posts: 654 Member: 833760 Status: Offline Sonork: 100.1597150 Thanks Meter: 114	what do you want to reversing? it is already clarified by others.

11-23-2014, 14:55	#3 (permalink)
tukara Freak Poster Join Date: Aug 2011 Posts: 290 Member: 1633328 Status: Offline Thanks Meter: 37	Thanks for reply. Well I think I read all post here and I haven't find anything about how yo find problems reversing but let me try to explain what I want. Sometimes samsung phones get the baseband damaged when we are trying to repair the Imei with boxes. Sometimes the wifi or bluetooth get damaged too. I'd like to know how can I know what 's exactly happening with the phone and how to solve it if it possible. I think if i know how to apply the reverse engineering to a damaged phone i can determine if the phone has hardware or software problem. Sent from my iPhone using Tapatalk

11-23-2014, 22:58	#4 (permalink)
SamsungAsia Junior Member Join Date: Nov 2014 Location: service center vietnam Posts: 1 Member: 2298115 Status: Offline Thanks Meter: 0	some kind of exe made thru delphi vb and it contains manual guide's?

11-26-2014, 12:47	#5 (permalink)
psytr0nic No Life Poster Join Date: Oct 2010 Location: Abidjan Age: 38 Posts: 2,478 Member: 1418143 Status: Offline Thanks Meter: 353	according what I read here imei isn't related to emmc issue .. but by BAseband Ic ( CPu & nand ) .. Im I wrong big bro's ?

11-26-2014, 14:28	#6 (permalink)
tukara Freak Poster Join Date: Aug 2011 Posts: 290 Member: 1633328 Status: Offline Thanks Meter: 37	Well i read that too. But some jtag box support told me that i have faulty eMMC so I really dont know what to do now. That why I'm asking here to get answers or at least links to read, read, read. Sent from my iPhone using Tapatalk

11-26-2014, 15:20	#7 (permalink)
psytr0nic No Life Poster Join Date: Oct 2010 Location: Abidjan Age: 38 Posts: 2,478 Member: 1418143 Status: Offline Thanks Meter: 353	yur phone model ?

11-28-2014, 16:32	#8 (permalink)
tukara Freak Poster Join Date: Aug 2011 Posts: 290 Member: 1633328 Status: Offline Thanks Meter: 37	Samsung sgh-t999, sgh-i747, m919, i337. I've seen this problem on samsung phones S version and note version. Sent from my iPhone using Tapatalk

11-29-2014, 14:53	#9 (permalink)
KE6SOLTI No Life Poster Join Date: Mar 2013 Location: Nepal Age: 41 Posts: 728 Member: 1906979 Status: Offline Sonork: 100.1681049 Thanks Meter: 162	if modem(bb chip) is working then you can see imei on screen, emmc is damage or working does mot matter.i have repair lot of phones in this case by hardware.i face much type of problams. so we cant sure that problam is in emmc.

12-11-2014, 02:12	#12 (permalink)
tukara Freak Poster Join Date: Aug 2011 Posts: 290 Member: 1633328 Status: Offline Thanks Meter: 37	Hello nobody here could help me please? Sent from my iPhone using Tapatalk

12-12-2014, 03:43	#14 (permalink)
tukara Freak Poster Join Date: Aug 2011 Posts: 290 Member: 1633328 Status: Offline Thanks Meter: 37	Hello thanks for reply. They wont say anything. I think if some people learned reverse engineering why i cant?. 2 years ago i didnt know anything about repair, unlock, flash cell phones. I just want to go deepest in repairs and think Reverse Engineering is the best way. I hope some master here could help me on it. Sent from my iPhone using Tapatalk

12-12-2014, 03:58	#15 (permalink)
ecs87 Banned Join Date: Nov 2013 Location: Chicago, IL Posts: 995 Member: 2076039 Status: Offline Thanks Meter: 648	No one is going to hold your hand through this. I was fortunate to have dest give me a pointer or two, but he left me to my own devices. I didn't ask repetitive questions, I did a lot of my own research and in the end I learned no one is going to hand feed you. The information is out there. If you're begging for it, then your effort is being wasted. 99% of your time should be spent researching. 1% of the time should be other tasks (including asking direct questions). So for every 99 pdf documents (github code, .jar code, .apk code, dissecting libraries, going through ARM code, etc.) you've read over relevant material...You get one question. This isn't college. You're hacking into proprietary software where the bugs and patches aren't readily available publically. There is no book or professor; you have to learn by yourself and teach yourself (i guess it's similar to online schooling? Lol).