SM-G550T unlock problem, need downgrade modem [Answered] - GSM-Forum

chmsc_ELX · 10-08-2017, 06:37

hello gsm server

can u give me a link modem only to downgrade this SM-G550T?

logs
Welcome to Octoplus/Octopus Box Samsung software version 2.6.0
-----------------------------------------------------------------------------------
To connect GT-N5100 phone you have to perform the following steps:
1. Disconnect USB cable from phone.
2. Go to Menu->Settings->More->About Device.
3.Tap on "Build number" 7 times to enable developer options.
4. Go to Menu->Settings->More->Developer options.
5. Turn on "USB Debugging" option.
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM22
Selected model: SM-G550T
Reading info, please wait...
Proper android device not found. Make shure that "USB debug" option
on the device is turned on.
Performed by 2.6.0 Software version.
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM22
Selected model: SM-G550T
Reading info, please wait...
Please, press "OK" button on the phone to allow USB debugging.
Detected phone model: SM-G550T
Firmware compiled date: Thu Mar 23 17:45:19 KST 2017
PDA version: G550TUVU2AQC4
CSC version: G550TTMB2AQC4
SW version: G550TUVU2AQC4
Phone SN: RV8HA0D886Y
Android version: 6.0.1 (MMB29K)
Sales code: TMB
Country: USA
HW platform: exynos3
HW Chip: exynos3475
HW Modem: SHANNON308
Security patch level: 2017-03-01
SIM 1 status: absent
Codename: on5ltetmo
Performed by 2.6.0 Software version.
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM22
Selected model: SM-G550T
Detected phone model: SM-G550T
Firmware compiled date: Thu Mar 23 17:45:19 KST 2017
PDA version: G550TUVU2AQC4
CSC version: G550TTMB2AQC4
SW version: G550TUVU2AQC4
Phone SN: RV8HA0D886Y
Android version: 6.0.1 (MMB29K)
Sales code: TMB
Country: USA
HW platform: exynos3
HW Chip: exynos3475
HW Modem: SHANNON308
Security patch level: 2017-03-01
SIM 1 status: absent
Codename: on5ltetmo
Checking Root:
Phone unlocking failed
Performed by 2.6.0 Software version.
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM22
Selected model: SM-G550T
Please, press "OK" button on the phone to allow USB debugging.
Proper android device not found. Make shure that "USB debug" option
on the device is turned on.
Phone unlocking failed
Performed by 2.6.0 Software version.
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM11
Selected model: SM-G550T
Reading info, please wait...
Please, press "OK" button on the phone to allow USB debugging.
Proper android device not found. Make shure that "USB debug" option
on the device is turned on.
Performed by 2.6.0 Software version.
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM11
Selected model: SM-G550T
Reading info, please wait...
Please, press "OK" button on the phone to allow USB debugging.
Proper android device not found. Make shure that "USB debug" option
on the device is turned on.
Performed by 2.6.0 Software version.
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM11
Selected model: SM-G550T
Reading info, please wait...
Please, press "OK" button on the phone to allow USB debugging.
Proper android device not found. Make shure that "USB debug" option
on the device is turned on.
Performed by 2.6.0 Software version.
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM11
Selected model: SM-G550T
Reading info, please wait...
Please, press "OK" button on the phone to allow USB debugging.
Proper android device not found. Make shure that "USB debug" option
on the device is turned on.
Performed by 2.6.0 Software version.
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM11
Selected model: SM-G550T
Reading info, please wait...
Detected phone model: SM-G550T
Firmware compiled date: Thu Mar 23 17:45:19 KST 2017
PDA version: G550TUVU2AQC4
CSC version: G550TTMB2AQC4
SW version: G550TUVU2AQC4
Phone SN: RV8HA0D886Y
Android version: 6.0.1 (MMB29K)
Sales code: TMB
Country: USA
HW platform: exynos3
HW Chip: exynos3475
HW Modem: SHANNON308
Security patch level: 2017-03-01
SIM 1 status: absent
Codename: on5ltetmo
Performed by 2.6.0 Software version.
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM11
Selected model: SM-G550T
Detected phone model: SM-G550T
Firmware compiled date: Thu Mar 23 17:45:19 KST 2017
PDA version: G550TUVU2AQC4
CSC version: G550TTMB2AQC4
SW version: G550TUVU2AQC4
Phone SN: RV8HA0D886Y
Android version: 6.0.1 (MMB29K)
Sales code: TMB
Country: USA
HW platform: exynos3
HW Chip: exynos3475
HW Modem: SHANNON308
Security patch level: 2017-03-01
SIM 1 status: absent
Codename: on5ltetmo
Checking Root:
Phone is Rooted.
Reading security backup, please wait...
Backup saved as C:\Program Files (x86)\Octoplus\Octoplus_Samsung
\BACKUP\Security-SM-G550T-Unknown08-10-2017_13-22-13-.asec
file
Connecting to modem port...
Found phone on COM13
Reading data from phone...
Could not read data from modem port, trying with exploit..
Initializing exploit...
Executing exploit...
Executing exploit failed
Phone unlocking failed
Performed by 2.6.0 Software version.
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM13
Selected model: SM-G550T
Detected phone model: SM-G550T
Firmware compiled date: Thu Mar 23 17:45:19 KST 2017
PDA version: G550TUVU2AQC4
CSC version: G550TTMB2AQC4
SW version: G550TUVU2AQC4
Phone SN: RV8HA0D886Y
Android version: 6.0.1 (MMB29K)
Sales code: TMB
Country: USA
HW platform: exynos3
HW Chip: exynos3475
HW Modem: SHANNON308
Security patch level: 2017-03-01
SIM 1 status: absent
Codename: on5ltetmo
Checking Root:
Phone is Rooted.
Reading security backup, please wait...
Backup saved as C:\Program Files (x86)\Octoplus\Octoplus_Samsung
\BACKUP\Security-SM-G550T-Unknown08-10-2017_13-24-35-.asec
file
Connecting to modem port...
Found phone on COM13
Reading data from phone...
Could not read data from modem port, trying with exploit..
Initializing exploit...
Executing exploit...
Executing exploit failed
Phone unlocking failed
Performed by 2.6.0 Software version.
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM11
Selected model: SM-G550T
Detected phone model: SM-G550T
Firmware compiled date: Thu Mar 23 17:45:19 KST 2017
PDA version: G550TUVU2AQC4
CSC version: G550TTMB2AQC4
SW version: G550TUVU2AQC4
Phone SN: RV8HA0D886Y
Android version: 6.0.1 (MMB29K)
Sales code: TMB
Country: USA
HW platform: exynos3
HW Chip: exynos3475
HW Modem: SHANNON308
Security patch level: 2017-03-01
SIM 1 status: absent
Codename: on5ltetmo
Checking Root:
Phone is Rooted.
Reading security backup, please wait...
Backup saved as C:\Program Files (x86)\Octoplus\Octoplus_Samsung
\BACKUP\Security-SM-G550T-Unknown08-10-2017_13-27-58-.asec
file
Connecting to modem port...
Found phone on COM13
Reading data from phone...
Could not read data from modem port, trying with exploit..
Initializing exploit...
Executing exploit...
Executing exploit failed
Phone unlocking failed
Performed by 2.6.0 Software version.

Octopus box · 10-08-2017, 10:42

Hello.

You can try to write modem only, using firmware file for SM-G550T from the Support Area via "Advanced mode" option (select firmware, un-check all partitions except modem).

laiijuwara88 · 01-18-2018, 15:52

how can i have the modem file g550t

Octopus box · 01-18-2018, 16:15

Select full firmware file, press "Write Firmware" button, select "modem" part only and write it.

haadimobiles · 01-26-2018, 12:06

Quote:

Originally Posted by Octopus box

Select full firmware file, press "Write Firmware" button, select "modem" part only and write it.

Tried methode to just flash Modem from old file but still no progress...
also no IMEI and Baseband....

Code:

Welcome to Octoplus Box Samsung software version 2.6.3
Platform: Samsung Android
Selected port: COM3
Selected model: SM-G550T
Detected phone model: SM-G550T
Firmware compiled date: Thu Mar 23 17:45:19 KST 2017
PDA version: G550TUVU2AQC4
CSC version: G550TTMB2AQC4
SW version: unknown
Phone SN: RV8HC1K9ZQM
Android version: 6.0.1 (MMB29K)
Sales code: TMB
Country: USA
HW platform: exynos3
HW Chip: exynos3475
HW Modem: unknown
Security patch level: 2017-03-01
SIM 1 status: not ready
Codename: on5ltetmo
Checking Root:
Phone is Rooted.
Reading security backup, please wait...
Backup saved as C:\Program Files\Octoplus\Octoplus_Samsung
\BACKUP\Security-SM-G550T-Unknown26-01-2018_16-00-45-.asec 
file
Connecting to modem port...
Modem port was not found!
Initializing exploit...
Executing exploit...
Executing exploit failed
Phone unlocking failed
Performed by 2.6.3 Software version.

Octopus box · 01-26-2018, 13:55

As You can see from your Software log, modem firmware, which You have written is not compatible and modem part is not working after writing it:

Quote:

SW version: unknown

Quote:

HW Modem: unknown

It is not possible to perform the "Unlock" operation if modem is not working in your phone. Try to write another modem firmwares.

ThePhoneTechDoc · 01-26-2018, 16:48

reflash this modem from this firmware G550TUVU2AQC4 to regain baseband and then update your octoplus software after repeat the unlocking process again...if not successful then pm i will tell u which modem to use and unlock will be successful

haadimobiles · 01-27-2018, 07:47

After Flashing G550TUVU2AQC4 phone is ok...
IMEI and Baseband is ok now...
but still can't unlock it...
My octoplus software is uptodate

netmobile · 01-27-2018, 17:13

Quote:

Originally Posted by haadimobiles

After Flashing G550TUVU2AQC4 phone is ok...
IMEI and Baseband is ok now...
but still can't unlock it...
My octoplus software is uptodate

Make a full flash with this file: https://androidfilehost.com/?fid=529152257862703012 , then root the cell phone and afterwards perform the unlocking operation.

haadimobiles · 01-28-2018, 09:09

Quote:

Originally Posted by netmobile

Make a full flash with this file: https://androidfilehost.com/?fid=529152257862703012 , then root the cell phone and afterwards perform the unlocking operation.

Ok i'm Downloading it...

haadimobiles · 01-28-2018, 11:01

Quote:

Originally Posted by netmobile

Make a full flash with this file: https://androidfilehost.com/?fid=529152257862703012 , then root the cell phone and afterwards perform the unlocking operation.

Phone Unlocked Successfully with your help...

Code:

Welcome to Octoplus Box Samsung software version 2.6.4
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM35
Selected model: SM-G550T
Reading info, please wait...
Please, press "OK" button on the phone to allow USB debugging.
Detected phone model: SM-G550T
Firmware compiled date: Fri Dec  2 16:48:51 KST 2016
PDA version: G550TUVS2APL1
CSC version: G550TTMB2APL1
SW version: G550TUVS2APL1
Phone SN: RV8HC1K9ZQM
Android version: 6.0.1 (MMB29K)
Sales code: TMB
Country: USA
HW platform: exynos3
HW Chip: exynos3475
HW Modem: SHANNON308
Security patch level: 2016-11-01
SIM 1 status: absent
Codename: on5ltetmo
Performed by 2.6.4 Software version.
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM35
Selected model: SM-G550T
Detected phone model: SM-G550T
Firmware compiled date: Fri Dec  2 16:48:51 KST 2016
PDA version: G550TUVS2APL1
CSC version: G550TTMB2APL1
SW version: G550TUVS2APL1
Phone SN: RV8HC1K9ZQM
Android version: 6.0.1 (MMB29K)
Sales code: TMB
Country: USA
HW platform: exynos3
HW Chip: exynos3475
HW Modem: SHANNON308
Security patch level: 2016-11-01
SIM 1 status: absent
Codename: on5ltetmo
Checking Root:
Phone is Rooted.
Reading security backup, please wait...
Backup saved as C:\Program Files\Octoplus\Octoplus_Samsung
\BACKUP\Security-SM-G550T-RV8HC1K9ZQM-28-01-2018_14-46-
58-.asec file
Connecting to modem port...
Found phone on COM35
Reading data from phone...OK
Unlocking phone...
Phone is successfully unlocked
To finish the operation, please restart the phone via phone's menu.
Performed by 2.6.4 Software version.

10-08-2017, 06:37	#1 (permalink)
chmsc_ELX No Life Poster Join Date: Mar 2012 Location: gsm world Posts: 887 Member: 1741973 Status: Offline Thanks Meter: 115	SM-G550T unlock problem, need downgrade modem [Answered] hello gsm server can u give me a link modem only to downgrade this SM-G550T? logs Welcome to Octoplus/Octopus Box Samsung software version 2.6.0 ----------------------------------------------------------------------------------- To connect GT-N5100 phone you have to perform the following steps: 1. Disconnect USB cable from phone. 2. Go to Menu->Settings->More->About Device. 3.Tap on "Build number" 7 times to enable developer options. 4. Go to Menu->Settings->More->Developer options. 5. Turn on "USB Debugging" option. ----------------------------------------------------------------------------------- Platform: Samsung Android Selected port: COM22 Selected model: SM-G550T Reading info, please wait... Proper android device not found. Make shure that "USB debug" option on the device is turned on. Performed by 2.6.0 Software version. ----------------------------------------------------------------------------------- Platform: Samsung Android Selected port: COM22 Selected model: SM-G550T Reading info, please wait... Please, press "OK" button on the phone to allow USB debugging. Detected phone model: SM-G550T Firmware compiled date: Thu Mar 23 17:45:19 KST 2017 PDA version: G550TUVU2AQC4 CSC version: G550TTMB2AQC4 SW version: G550TUVU2AQC4 Phone SN: RV8HA0D886Y Android version: 6.0.1 (MMB29K) Sales code: TMB Country: USA HW platform: exynos3 HW Chip: exynos3475 HW Modem: SHANNON308 Security patch level: 2017-03-01 SIM 1 status: absent Codename: on5ltetmo Performed by 2.6.0 Software version. ----------------------------------------------------------------------------------- Platform: Samsung Android Selected port: COM22 Selected model: SM-G550T Detected phone model: SM-G550T Firmware compiled date: Thu Mar 23 17:45:19 KST 2017 PDA version: G550TUVU2AQC4 CSC version: G550TTMB2AQC4 SW version: G550TUVU2AQC4 Phone SN: RV8HA0D886Y Android version: 6.0.1 (MMB29K) Sales code: TMB Country: USA HW platform: exynos3 HW Chip: exynos3475 HW Modem: SHANNON308 Security patch level: 2017-03-01 SIM 1 status: absent Codename: on5ltetmo Checking Root: Phone unlocking failed Performed by 2.6.0 Software version. ----------------------------------------------------------------------------------- Platform: Samsung Android Selected port: COM22 Selected model: SM-G550T Please, press "OK" button on the phone to allow USB debugging. Proper android device not found. Make shure that "USB debug" option on the device is turned on. Phone unlocking failed Performed by 2.6.0 Software version. ----------------------------------------------------------------------------------- Platform: Samsung Android Selected port: COM11 Selected model: SM-G550T Reading info, please wait... Please, press "OK" button on the phone to allow USB debugging. Proper android device not found. Make shure that "USB debug" option on the device is turned on. Performed by 2.6.0 Software version. ----------------------------------------------------------------------------------- Platform: Samsung Android Selected port: COM11 Selected model: SM-G550T Reading info, please wait... Please, press "OK" button on the phone to allow USB debugging. Proper android device not found. Make shure that "USB debug" option on the device is turned on. Performed by 2.6.0 Software version. ----------------------------------------------------------------------------------- Platform: Samsung Android Selected port: COM11 Selected model: SM-G550T Reading info, please wait... Please, press "OK" button on the phone to allow USB debugging. Proper android device not found. Make shure that "USB debug" option on the device is turned on. Performed by 2.6.0 Software version. ----------------------------------------------------------------------------------- Platform: Samsung Android Selected port: COM11 Selected model: SM-G550T Reading info, please wait... Please, press "OK" button on the phone to allow USB debugging. Proper android device not found. Make shure that "USB debug" option on the device is turned on. Performed by 2.6.0 Software version. ----------------------------------------------------------------------------------- Platform: Samsung Android Selected port: COM11 Selected model: SM-G550T Reading info, please wait... Detected phone model: SM-G550T Firmware compiled date: Thu Mar 23 17:45:19 KST 2017 PDA version: G550TUVU2AQC4 CSC version: G550TTMB2AQC4 SW version: G550TUVU2AQC4 Phone SN: RV8HA0D886Y Android version: 6.0.1 (MMB29K) Sales code: TMB Country: USA HW platform: exynos3 HW Chip: exynos3475 HW Modem: SHANNON308 Security patch level: 2017-03-01 SIM 1 status: absent Codename: on5ltetmo Performed by 2.6.0 Software version. ----------------------------------------------------------------------------------- Platform: Samsung Android Selected port: COM11 Selected model: SM-G550T Detected phone model: SM-G550T Firmware compiled date: Thu Mar 23 17:45:19 KST 2017 PDA version: G550TUVU2AQC4 CSC version: G550TTMB2AQC4 SW version: G550TUVU2AQC4 Phone SN: RV8HA0D886Y Android version: 6.0.1 (MMB29K) Sales code: TMB Country: USA HW platform: exynos3 HW Chip: exynos3475 HW Modem: SHANNON308 Security patch level: 2017-03-01 SIM 1 status: absent Codename: on5ltetmo Checking Root: Phone is Rooted. Reading security backup, please wait... Backup saved as C:\Program Files (x86)\Octoplus\Octoplus_Samsung \BACKUP\Security-SM-G550T-Unknown08-10-2017_13-22-13-.asec file Connecting to modem port... Found phone on COM13 Reading data from phone... Could not read data from modem port, trying with exploit.. Initializing exploit... Executing exploit... Executing exploit failed Phone unlocking failed Performed by 2.6.0 Software version. ----------------------------------------------------------------------------------- Platform: Samsung Android Selected port: COM13 Selected model: SM-G550T Detected phone model: SM-G550T Firmware compiled date: Thu Mar 23 17:45:19 KST 2017 PDA version: G550TUVU2AQC4 CSC version: G550TTMB2AQC4 SW version: G550TUVU2AQC4 Phone SN: RV8HA0D886Y Android version: 6.0.1 (MMB29K) Sales code: TMB Country: USA HW platform: exynos3 HW Chip: exynos3475 HW Modem: SHANNON308 Security patch level: 2017-03-01 SIM 1 status: absent Codename: on5ltetmo Checking Root: Phone is Rooted. Reading security backup, please wait... Backup saved as C:\Program Files (x86)\Octoplus\Octoplus_Samsung \BACKUP\Security-SM-G550T-Unknown08-10-2017_13-24-35-.asec file Connecting to modem port... Found phone on COM13 Reading data from phone... Could not read data from modem port, trying with exploit.. Initializing exploit... Executing exploit... Executing exploit failed Phone unlocking failed Performed by 2.6.0 Software version. ----------------------------------------------------------------------------------- Platform: Samsung Android Selected port: COM11 Selected model: SM-G550T Detected phone model: SM-G550T Firmware compiled date: Thu Mar 23 17:45:19 KST 2017 PDA version: G550TUVU2AQC4 CSC version: G550TTMB2AQC4 SW version: G550TUVU2AQC4 Phone SN: RV8HA0D886Y Android version: 6.0.1 (MMB29K) Sales code: TMB Country: USA HW platform: exynos3 HW Chip: exynos3475 HW Modem: SHANNON308 Security patch level: 2017-03-01 SIM 1 status: absent Codename: on5ltetmo Checking Root: Phone is Rooted. Reading security backup, please wait... Backup saved as C:\Program Files (x86)\Octoplus\Octoplus_Samsung \BACKUP\Security-SM-G550T-Unknown08-10-2017_13-27-58-.asec file Connecting to modem port... Found phone on COM13 Reading data from phone... Could not read data from modem port, trying with exploit.. Initializing exploit... Executing exploit... Executing exploit failed Phone unlocking failed Performed by 2.6.0 Software version. Last edited by Octopus box; 01-18-2018 at 16:15.

10-08-2017, 10:42	#2 (permalink)
Octopus box Product Supporter Join Date: Oct 2009 Location: Romania, Bucharest Posts: 99,835 Member: 1146942 Status: Offline Sonork: 100.1587278 Thanks Meter: 27,411	Hello. You can try to write modem only, using firmware file for SM-G550T from the Support Area via "Advanced mode" option (select firmware, un-check all partitions except modem). Last edited by Octopus box; 10-10-2017 at 05:41.

01-18-2018, 15:52	#3 (permalink)
laiijuwara88 Junior Member Join Date: Jun 2014 Posts: 14 Member: 2212551 Status: Offline Sonork: laiijuwara88 Thanks Meter: 0	how can i have the modem file g550t

01-18-2018, 16:15	#4 (permalink)
Octopus box Product Supporter Join Date: Oct 2009 Location: Romania, Bucharest Posts: 99,835 Member: 1146942 Status: Offline Sonork: 100.1587278 Thanks Meter: 27,411	Select full firmware file, press "Write Firmware" button, select "modem" part only and write it.

01-26-2018, 16:48	#7 (permalink)
ThePhoneTechDoc No Life Poster Join Date: Jan 2017 Location: Jamaica Posts: 720 Member: 2673816 Status: Offline Thanks Meter: 612	reflash this modem from this firmware G550TUVU2AQC4 to regain baseband and then update your octoplus software after repeat the unlocking process again...if not successful then pm i will tell u which modem to use and unlock will be successful

01-27-2018, 07:47	#8 (permalink)
haadimobiles Freak Poster Join Date: Aug 2014 Location: Pakistan Posts: 105 Member: 2241683 Status: Offline Thanks Meter: 11	After Flashing G550TUVU2AQC4 phone is ok... IMEI and Baseband is ok now... but still can't unlock it... My octoplus software is uptodate