C25 Hardware DOWNGRADE v61 to v4x-5x - GSM-Forum

Karateka · 09-17-2002, 15:42

Hello every one. I have killed one C25 after unlock by KOCI 5.37 Who knows how downgrade hardware Sieemens C25 ver.61 to ver.4x-5x for repair EEPROM data on a Maker 1.92 by Bartec. May be sum one have Circuit diagram & Repair hints?

Yurick · 09-19-2002, 08:41

Compare circuit under BGA case of CPU in 49 and in 61 versions.
After that you will see how to make downgrade.

Karateka · 09-19-2002, 13:57

Sorry... I don't have C25/28 ver. 4x-5x.

bedjo · 09-19-2002, 17:03

if our phone dead cause -ONLY UNLOCK- BY KOCI not bad flasing..., just unlock again with old koci not 37 (i'm not remember),your phone will be a live again.

as i know, until now no solution for c25/26 versi61 dead phone and wrongsoft.

Yurick · 09-19-2002, 18:46

Quote:

Originally posted by bedjo
as i know, until now no solution for c25/26 versi61 dead phone and wrongsoft.

Yes, for v.61 there is no software for repair, therefore necessary to make software downgrade, but before these necessary to make hardware downgrade.

Who knows?

MAK_US1977 · 09-27-2002, 07:03

Hi
use koci ver 5.22 and it will be work again

u unlocked it with unlock_allc25_61.c2u, right?

Abe · 09-28-2002, 01:03

YOu have to move just one little resistor on the pcb from one place to another.........and then flash with lower version........
100% working solution but i have the picture somewhere on my CD-s......i will look for it theese days as i have more than 50 CD-S with new/old software..............
But that was and is the only solution to repair..........
Regards.........

realcool · 09-28-2002, 04:17

waiting for you to have some free time to search that cd ABE

Yurick · 09-28-2002, 09:01

Quote:

Originally posted by MAK_US1977
Hi
use koci ver 5.22 and it will be work again

u unlocked it with unlock_allc25_61.c2u, right?

Yes, I have killed a mobile by this unlocker.
But koci 5.22 does not repair it

Yurick · 09-28-2002, 09:13

Quote:

Originally posted by Abe
YOu have to move just one little resistor on the pcb from one place to another.........and then flash with lower version........
100% working solution but i have the picture somewhere on my CD-s......i will look for it theese days as i have more than 50 CD-S with new/old software..............
But that was and is the only solution to repair..........
Regards.........

I have compared mobile versions 49 and 61.
Has found 4 resistors in version 61 which are not present in 49.
These are two dividers of a voltage 1:10 (1 MOhm and 10 MOhm).
Tried them to place in another way, but could not make downgrade.
How them is correct to place?

Let's wait for your picture.

Kiss · 10-08-2002, 01:20

I'll compare 49 & 61v, but find only one resistor - near bottom right conner, near flash, but replace it of analog of 49v have no effect. My try to replase flash in 49 and reflash and repair Bartec1.92 have no effect too... after solid flash in 61v and try to flash - "wrong software"... And one problem - can't connect SWUP all wersion's... Kochi connect well, first try - connect ok, but SWUP not connected, try 15-20esc... (Sorry of my english....) Hawe no idea to do alive 61v. And hawe no idea to downgrade - i'll can't see difference of 49v to 61v.... Can anybody elp us????

Hary · 10-09-2002, 14:13

hi abe i waiting your answer about resistor..........

Yurick · 10-09-2002, 23:24

Quote:

Originally posted by Hary
hi abe i waiting your answer about resistor..........

and I too

Abe · 10-10-2002, 03:02

Hi.........sorry for delay,but i have to search more..........i checked about 20 cd's till now.......sorry for this,but this is an old solution so u will have to wait untill i find it.............
Sorry for waiting ..........regards..........

Dream gsm · 10-13-2002, 09:44

I have working and tested partial for v61. If somebody want, just mail me:

[email protected]

Regards.

09-17-2002, 15:42	#1 (permalink)
Karateka Freak Poster Join Date: Jul 2002 Location: Belarus Age: 53 Posts: 140 Member: 14077 Status: Offline Thanks Meter: 0	C25 Hardware DOWNGRADE v61 to v4x-5x Hello every one. I have killed one C25 after unlock by KOCI 5.37 Who knows how downgrade hardware Sieemens C25 ver.61 to ver.4x-5x for repair EEPROM data on a Maker 1.92 by Bartec. May be sum one have Circuit diagram & Repair hints?

09-19-2002, 08:41	#2 (permalink)
Yurick Junior Member Join Date: Aug 2002 Location: Belarus Age: 48 Posts: 10 Member: 14596 Status: Offline Thanks Meter: 0	I'm known! Compare circuit under BGA case of CPU in 49 and in 61 versions. After that you will see how to make downgrade.

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09-19-2002, 13:57	#3 (permalink)
Karateka Freak Poster Join Date: Jul 2002 Location: Belarus Age: 53 Posts: 140 Member: 14077 Status: Offline Thanks Meter: 0	Sorry... I don't have C25/28 ver. 4x-5x.

09-19-2002, 17:03	#4 (permalink)
bedjo No Life Poster Join Date: Mar 2002 Location: HEAVEN Age: 51 Posts: 673 Member: 10243 Status: Offline Thanks Meter: 18	if our phone dead cause -ONLY UNLOCK- BY KOCI not bad flasing..., just unlock again with old koci not 37 (i'm not remember),your phone will be a live again. as i know, until now no solution for c25/26 versi61 dead phone and wrongsoft.

09-27-2002, 07:03	#6 (permalink)
MAK_US1977 No Life Poster Join Date: Apr 2001 Location: Egypt Age: 46 Posts: 1,530 Member: 4263 Status: Offline Sonork: 100.1582330 Thanks Meter: 49	Hi use koci ver 5.22 and it will be work again u unlocked it with unlock_allc25_61.c2u, right?

09-28-2002, 01:03	#7 (permalink)
Abe No Life Poster Join Date: Apr 2001 Location: Croatia Age: 45 Posts: 1,114 Member: 4185 Status: Offline Thanks Meter: 3	YOu have to move just one little resistor on the pcb from one place to another.........and then flash with lower version........ 100% working solution but i have the picture somewhere on my CD-s......i will look for it theese days as i have more than 50 CD-S with new/old software.............. But that was and is the only solution to repair.......... Regards.........

09-28-2002, 04:17	#8 (permalink)
realcool Freak Poster Join Date: Feb 2002 Location: In your heart Posts: 409 Member: 9224 Status: Offline Thanks Meter: 18	waiting for you to have some free time to search that cd ABE

10-08-2002, 01:20	#11 (permalink)
Kiss Junior Member Join Date: Aug 2002 Location: Ukraine, Odessa Age: 53 Posts: 12 Member: 14331 Status: Offline Thanks Meter: 2	I'll compare 49 & 61v, but find only one resistor - near bottom right conner, near flash, but replace it of analog of 49v have no effect. My try to replase flash in 49 and reflash and repair Bartec1.92 have no effect too... after solid flash in 61v and try to flash - "wrong software"... And one problem - can't connect SWUP all wersion's... Kochi connect well, first try - connect ok, but SWUP not connected, try 15-20esc... (Sorry of my english....) Hawe no idea to do alive 61v. And hawe no idea to downgrade - i'll can't see difference of 49v to 61v.... Can anybody elp us????

10-09-2002, 14:13	#12 (permalink)
Hary Freak Poster Join Date: Feb 2002 Location: Jakarta Posts: 149 Member: 9261 Status: Offline Thanks Meter: 0	hi abe i waiting your answer about resistor..........

10-10-2002, 03:02	#14 (permalink)
Abe No Life Poster Join Date: Apr 2001 Location: Croatia Age: 45 Posts: 1,114 Member: 4185 Status: Offline Thanks Meter: 3	Hi.........sorry for delay,but i have to search more..........i checked about 20 cd's till now.......sorry for this,but this is an old solution so u will have to wait untill i find it............. Sorry for waiting ..........regards..........

10-13-2002, 09:44	#15 (permalink)
Dream gsm Freak Poster Join Date: Jul 2001 Location: Poland Posts: 429 Member: 5361 Status: Offline Thanks Meter: 8	I have working and tested partial for v61. If somebody want, just mail me: [email protected] Regards.