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Old January 9th, 2012, 08:57 PM   #1 (permalink)
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Default Diagnostic mode?

Anyone know how to put the Prevail into Diagnostic Mode?

I know that on the Epic it is ##8778#. But on the Prevail it brings me to a screen but the computer wont pick it up as a device in diagnostic mode on any port. It does pick it up as a Samsung Modem. I have the standard drivers... could it be that I need to get diagnostic drivers? Disabling the modem didn't help either.

Any help/ideas folks?

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Old January 9th, 2012, 09:00 PM   #2 (permalink)
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I have used dm before without a hitch. Do you have USB debugging on? Or "ask on connection"?
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Old January 9th, 2012, 09:10 PM   #3 (permalink)
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I think it's ##7876# then hit email and it should reboot into the mode you need at least that's what I have o do on the to be able to change the prl of the phone
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Old January 9th, 2012, 10:12 PM   #4 (permalink)
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Quote:
Switch to a Sprint prl
All thanks to Koumajutsu for letting me use his tut
1) Turn on USB Debugging in the Settings > Applications > Development menu

2) Change your "DM" mode to USB on froyo
__a) Get your MSL: "adb shell getprop ril.MSL" (if you don't know how to use ADB, ask for help before following this)
__b) Enter the DM menu dial ##8778#
__c) Enter your MSL
__d) Select USB
To change your phone to DM mode for gingerbread
__a)Dial ##7678#
__b)Enter your MSL
__c)Select DM and your phone should reboot in DM mode
this should help
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Old January 10th, 2012, 01:30 AM   #5 (permalink)
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I thought I might of had the 7678 swapped around and I did thanks for that post as that is what i was trying to explain
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Old January 16th, 2012, 01:40 PM   #6 (permalink)
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this should help
I've been looking for an answer/fix to the usb diag port issue after using GB V2.1 from AA51. This worked perfectly
Thank you very much
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Old January 16th, 2012, 03:16 PM   #7 (permalink)
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your welcome
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Old March 28th, 2012, 12:35 PM   #8 (permalink)
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ok I know im going to make myself sound stupid but where do i dial ##7678# in order to be able to put in my msl number?
I've done it before just cant remember where I did it at
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Old March 28th, 2012, 12:37 PM   #9 (permalink)
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Originally Posted by prevail2exist View Post
ok I know im going to make myself sound stupid but where do i dial ##7678# in order to be able to put in my msl number?
I've done it before just cant remember where I did it at
use your dialer bro

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Old March 28th, 2012, 12:43 PM   #10 (permalink)
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I tried that but nothing happened

Edit: ok i tried the first number given which was ##8778# and the numbers just disappear
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Old March 28th, 2012, 12:47 PM   #11 (permalink)
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I tried that but nothing happened
cyanogenmod does not have a dialer menu, you have to use this:

http://androidforums.com/galaxy-prevail-all-things-root/496242-script-dm-cm7-v1-2-update-2-10-a.html
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Old March 28th, 2012, 12:48 PM   #12 (permalink)
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im running CTMod 3.3 not CM7
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Old March 28th, 2012, 01:31 PM   #13 (permalink)
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Quote:
Originally Posted by prevail2exist View Post
im running CTMod 3.3 not CM7
pretty sure it works for both

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Old March 28th, 2012, 01:33 PM   #14 (permalink)
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Quote:
Originally Posted by prevail2exist View Post
im running CTMod 3.3 not CM7
3.3 is made from another phones ROM... The dialer isn't supported in 3.3 either
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Old March 28th, 2012, 05:38 PM   #15 (permalink)
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Quote:
Originally Posted by Caeadas View Post
yeah above post didnt say what rom he was using..plus i havent messed with prls and the hidden menu sense ctmod 2.4...i know back then you used the dialer..plus i thought he was asking where you would enter those numbers..thats why i said the dialer
i dont know much about that dl mode script so i wouldnt be of anymore help
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Old March 28th, 2012, 06:40 PM   #16 (permalink)
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Quote:
Originally Posted by prevail2exist View Post
im running CTMod 3.3 not CM7

Quote:
Originally Posted by Koumajutsu View Post
pretty sure it works for both

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It does .
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Old June 13th, 2012, 04:36 PM   #17 (permalink)
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Default same help needed... I think...

Have prevail...rooted...switched both 7876 & 8778 to USB...but still seems not to be in diag mode... Can't get cdma workshop to Connect...."failed.. Phone not answering"...3 days straight...HELP PLEASE
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Old June 13th, 2012, 05:08 PM   #18 (permalink)
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Have prevail...rooted...switched both 7876 & 8778 to USB...but still seems not to be in diag mode... Can't get cdma workshop to Connect...."failed.. Phone not answering"...3 days straight...HELP PLEASE
When you dialed #7678## entered msl then selected dm , did your phone reboot?
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Old June 13th, 2012, 05:10 PM   #19 (permalink)
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Originally Posted by 504rebel View Post
Have prevail...rooted...switched both 7876 & 8778 to USB...but still seems not to be in diag mode... Can't get cdma workshop to Connect...."failed.. Phone not answering"...3 days straight...HELP PLEASE
what rom are you running?
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Old June 13th, 2012, 05:44 PM   #20 (permalink)
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Originally Posted by 504rebel View Post
Have prevail...rooted...switched both 7876 & 8778 to USB...but still seems not to be in diag mode... Can't get cdma workshop to Connect...."failed.. Phone not answering"...3 days straight...HELP PLEASE
prolly not 2.5 or lower and not 1/2 ass.
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Old June 13th, 2012, 06:00 PM   #21 (permalink)
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[SCRIPT]DM for CM7/CTMOD [UPDATE 2/10]

Try that.
Enable DM mode, then reboot.
when done, use the script again to disable and reboot again
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Old June 13th, 2012, 07:02 PM   #22 (permalink)
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the script doesnt work on all phones. best thing to do is to make a backup and flash ctmod 2.4 and then dial ##7678# select dm and your phone should reboot. thats what i do and it works. did it a couple of days ago and it worked
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Old June 25th, 2012, 07:27 AM   #23 (permalink)
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Originally Posted by kolosus View Post
Anyone know how to put the Prevail into Diagnostic Mode?

I know that on the Epic it is ##8778#. But on the Prevail it brings me to a screen but the computer wont pick it up as a device in diagnostic mode on any port. It does pick it up as a Samsung Modem. I have the standard drivers... could it be that I need to get diagnostic drivers? Disabling the modem didn't help either.

Any help/ideas folks?
##7678# the phone will reboot.
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Old July 15th, 2012, 05:45 PM   #24 (permalink)
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the easiest way to put your Samsung Prevail in Diag Mode

BLOG.PUGETSOUNDELECTRONICS.COM: How to get Samsung Prevail in DIAG mode
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Old December 23rd, 2013, 03:05 PM   #25 (permalink)
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hi, I have been trying to access my sph-m820bst through CDMA WS for several days to no avail. Every time I try to put it in DM regardless of rom (CT MOD3.8, HalfAssRom1_0, 187MoD-HoneyBread6) it fails to accept the MSL with an error message saying "modem exception occours". It also randomly reboots and dialer hangs when dialing. Thinking it may have something to do with the custom rom, I have spent the last few days searching for a stock rom but, all of the links posted in "all-things-root" thread are broken with the exception of the FF18-rooted, but the file is unflashable as far as I can tell. Im only using the phone for a doner phone, so the random reboots really don't matter that much to me unless someone thinks it may be a symptom of a larger problem. Any help provided would be GREATLY APPRECIATED! Thanks
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Old December 23rd, 2013, 03:32 PM   #26 (permalink)
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hi, I have been trying to access my sph-m820bst through CDMA WS for several days to no avail. Every time I try to put it in DM regardless of rom (CT MOD3.8, HalfAssRom1_0, 187MoD-HoneyBread6) it fails to accept the MSL with an error message saying "modem exception occours". It also randomly reboots and dialer hangs when dialing. Thinking it may have something to do with the custom rom, I have spent the last few days searching for a stock rom but, all of the links posted in "all-things-root" thread are broken with the exception of the FF18-rooted, but the file is unflashable as far as I can tell. Im only using the phone for a doner phone, so the random reboots really don't matter that much to me unless someone thinks it may be a symptom of a larger problem. Any help provided would be GREATLY APPRECIATED! Thanks
Are you sure the MSL is correct?

The MSL and other NV items are not part of the rom so the rom you are using is not likely to be a problem, the zip files, FF18 and such are not flashable they are to be used with odin, the phone needs to be in download mode.
If you want to use the phone for a donor the best thing to do is use QPST and use the file explorer part of it, open the nv items and pull out item 466. Then using winhex or another hex editor read it.
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Old December 23rd, 2013, 11:40 PM   #27 (permalink)
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Thanks for the quick reply. I tried to download the FF18 file twice just to be sure, but there was no ops file included. Isn't that kind of a deal breaker for flashing via Odin? As for the MSL, it was the one that the boost mobile customer service rep provided me with when I called yesterday. To read info from the device with QPST don't you need to be able to access diag mode?
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Old December 24th, 2013, 08:26 AM   #28 (permalink)
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Thanks for the quick reply. I tried to download the FF18 file twice just to be sure, but there was no ops file included. Isn't that kind of a deal breaker for flashing via Odin? As for the MSL, it was the one that the boost mobile customer service rep provided me with when I called yesterday. To read info from the device with QPST don't you need to be able to access diag mode?
I am not sure if it is a deal breaker, but it is a good idea.

I have the stock ej06 zip that does include the ops, you can just pull the ops to use with odin and still use the newer image. or use the old one and let it update. That can be found here
Yes boost should have given the correct one.

Yes you do need diag mode for qpst. But that info was for when you get to diag mode its easier to get the info from qpst, cdma ws will not give you the info you want. Though you do need to send the samsung password in cdma ws.
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Old December 24th, 2013, 12:37 PM   #29 (permalink)
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Here is the .ops file and correct version of Odin
https://dl.dropbox.com/u/54328432/PREVAILodin%26ops.zip
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Old December 26th, 2013, 04:43 PM   #30 (permalink)
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Thanks so much. image worked. Unfortunately, dialer still crashes with modem exception when trying to input MSL for Diag mode...
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Old December 26th, 2013, 07:56 PM   #31 (permalink)
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1. Confirm msl - in terminal type
Code:
 getprop ril.MSL
2. Dial ##8778# and enter your msl at the prompt.

3. Switch from UART to USB and return home

4. Dial ##7678# and enter your MSl

5. Switch from UMS To DM at which point your phone will reboot

6. Now open device manager and expand the com ports section. You should now see Suamsung Android usb Diagnostic Serial Port
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