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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Samsung > Samsung Android based phones

Samsung Android based phones Discussion and all of your questions relating to the Samsung Android based phones.

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Old 04-21-2017, 13:57   #16 (permalink)
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in simple words you can convert single into dual sim

take a phone G935F and root and read cert

open cert into notepad and make it dual ( manual already post in forum)

connect Same phone again and Put the cert which you edit for dual sim Just write it backup on Same phone

Done
you will get dual imei ( both imei will be same )
Enjoy Dual simcard Phone
Method is Tested and Working
Dont Ask for More
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Old 05-06-2017, 09:35   #17 (permalink)
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Hello, I have problem with my g935f S7.
I accidentally uploaded the firmware g935fd and now I can't restore it on g935f. Could you help me come fare to solve the problem. Thank you
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Old 03-23-2018, 08:50   #18 (permalink)
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No need to flash Sm-G935FD firmware yes?

IMEI2 in cert add via notepad I think.
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Old 03-24-2018, 11:05   #19 (permalink)
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I would like to help you if you're interested
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Old 03-25-2018, 01:56   #20 (permalink)
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Quote:
Originally Posted by benjamen50 View Post
No need to flash Sm-G935FD firmware yes?

IMEI2 in cert add via notepad I think.
u right no need any flash FD just IMEI2 via notpad and write back cert edit than restart phone and done
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Old 03-28-2018, 02:58   #21 (permalink)
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I think they have blocked downgrading older firmware than February 2018, I have too new firmware. Any solution for this? Older modem flashing seems to not work on newer firmware.
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Old 04-26-2018, 08:14   #22 (permalink)
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Turn On your Phone.
Go to Setting.
Then Go to About Device.
Then Go To Build Number and Press Build 8 times.
Now Go back and find Developer Option.
Now Turn On USB Debugging.
Now Go Back to Phone Dialer.
Press *#0808# and Select DM + Modem + ADB and Press Ok Button.
Now Connect USB cable and Open Z3x Box.
Now Go to G935FD Model and press repair From menu.
Now Enter IMEI of the Phone 2 Times and press Repair Button.
Mobile will ask For Adb Check Box and press Ok.
Then Ask for root permission. Check Box and click Ok.
Now Z3x will ask for Wrong Model Click Ok to Proceed.
Wait 2 Minutes after process of Z3x Mobile Will Restart.
When Mobile is In Full Menu Now In Z3x Repair Menu Press Patch Certificate.
wait 2 to 3 Minutes after restart insert dual sim jacket with Sims and check signals.
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Old 04-27-2018, 16:05   #23 (permalink)
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Anyone need help about convert it will be my pleasure to help
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Old 05-03-2018, 07:09   #24 (permalink)
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OK I Have read out the cert, I will try IMEI2 now notepad trick and report back if successful.

Last edited by benjamen50; 05-03-2018 at 07:18.
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Old 05-03-2018, 07:31   #25 (permalink)
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[ 3/05/2018 3:21:00 PM ] Operation: Write CERT
[ 3/05/2018 3:21:00 PM ] Selected model: SM-G935F
[ 3/05/2018 3:21:00 PM ] Software version: 31.5.1
[ 3/05/2018 3:21:00 PM ]
[ 3/05/2018 3:21:00 PM ] Waiting ADB device... OK
[ 3/05/2018 3:21:00 PM ] Reading phone info...
[ 3/05/2018 3:21:00 PM ] Model: SM-G935F
[ 3/05/2018 3:21:00 PM ] Android version: 7.0
[ 3/05/2018 3:21:00 PM ] PDA version: G935FXXS2DRCE
[ 3/05/2018 3:21:00 PM ] CSC version: G935FOPS2DRAC
[ 3/05/2018 3:21:00 PM ] Phone version: G935FXXU2DRAC
[ 3/05/2018 3:21:00 PM ] Product code: SM-G935FZSAOPS
[ 3/05/2018 3:21:00 PM ] CSC country code: Australia
[ 3/05/2018 3:21:00 PM ] CSC sales code: OPS
[ 3/05/2018 3:21:00 PM ] Phone SN:
[ 3/05/2018 3:21:00 PM ] IMEI:
[ 3/05/2018 3:21:00 PM ] HW version: MP 0.801
[ 3/05/2018 3:21:00 PM ] RF cal date: 20160609
[ 3/05/2018 3:21:00 PM ] Chip name: EXYNOS8890
[ 3/05/2018 3:21:00 PM ] Modem board: SHANNON335
[ 3/05/2018 3:21:00 PM ] Security patch: 2018-03-01
[ 3/05/2018 3:21:00 PM ] Boot Warranty bit: 1
[ 3/05/2018 3:21:00 PM ] Checking Super user right... true
[ 3/05/2018 3:21:00 PM ] Reading NV data... OK
[ 3/05/2018 3:21:00 PM ] Checking NV data... OK
[ 3/05/2018 3:21:00 PM ] Reading data... OK
[ 3/05/2018 3:21:00 PM ] Detecting MODEM... OK
[ 3/05/2018 3:21:00 PM ] Reading MODEM... OK
[ 3/05/2018 3:21:00 PM ] Calculating... OK
[ 3/05/2018 3:21:00 PM ] Writing zTool... OK
[ 3/05/2018 3:21:00 PM ] Initialization zTool... OK
[ 3/05/2018 3:21:00 PM ] Running zTool, please wait...
[ 3/05/2018 3:21:00 PM ] Start... OK
[ 3/05/2018 3:22:00 PM ] Initialization... OK
[ 3/05/2018 3:22:00 PM ] Generate and check client proof... OK
[ 3/05/2018 3:22:00 PM ] Verify proof by client... OK
[ 3/05/2018 3:22:00 PM ] Reading data... OK
[ 3/05/2018 3:22:00 PM ] HWID: 12 6D EE 6E CE A7 CA 65 BE 31 4C DA 3F FD E3 08
[ 3/05/2018 3:22:00 PM ] Calculating... OK
[ 3/05/2018 3:22:00 PM ] Initialization AT RIL...
[ 3/05/2018 3:22:00 PM ] AT RIL stopped, restarting... OK
[ 3/05/2018 3:23:00 PM ] Checking for compatible phone and cert
[ 3/05/2018 3:23:00 PM ] Phone KEY ID: 0445
[ 3/05/2018 3:23:00 PM ] Checking certificate file... OK
[ 3/05/2018 3:23:00 PM ] KEY ID: 0445
[ 3/05/2018 3:23:00 PM ] Crypting CERT 1... OK
[ 3/05/2018 3:23:00 PM ] Crypting CERT 2... OK
[ 3/05/2018 3:23:00 PM ] Writing NV data... OK
[ 3/05/2018 3:23:00 PM ] Rebooting phone... OK
[ 3/05/2018 3:23:00 PM ] Write CERT done

Very Good Dual sim work great.
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Old 05-10-2018, 05:01   #26 (permalink)
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error on checking cert:

Waiting ADB device... OK
Reading phone info...
Model: SM-G935F
Android version: 7.0
PDA version: G935FXXS2DRC3
CSC version: G935FOJV2DRAG
Phone version: G935FXXU2DRAG
Product code: SM-G935FZDAXSG
CSC country code: UAE
CSC sales code: XSG
Phone SN: RF8H43328ZE
IMEI: 359457077861960
HW version: MP 0.801
RF cal date: 20160429
Chip name: EXYNOS8890
Modem board: SHANNON335
Security patch: 2018-03-01
Boot Warranty bit: 1
Checking Super user right... true
Reading NV data... OK
Checking NV data... OK
Reading data... OK
Detecting MODEM... OK
Reading MODEM... OK
Calculating... OK
Writing zTool... OK
Initialization zTool... OK
Running zTool, please wait...
Start... OK
Initialization... OK
Generate and check client proof... OK
Verify proof by client... OK
Reading data... OK
HWID: 7B E7 25 8F 37 AE 47 A0 0E C3 60 98 0E 04 80 95
Calculating... OK
Initialization AT RIL...
AT RIL stopped, restarting... OK
Checking for compatible phone and cert
Phone KEY ID: 0445
Checking certificate file... error
Incorrect size of Public key 2 signature

Done with Samsung Tool PRO v.31.4
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Old 05-12-2018, 02:48   #27 (permalink)
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You need to add ImeiSign, PubKey, PubKeySign as well under IMEI2 in the cert file, check through YouTube video if needed.

Search up cert edit dual Sim repair, all shown there.

If it doesn't work I'll check out my dual Sim cert and post how to do it here.

Last edited by benjamen50; 05-12-2018 at 02:54.
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Old 05-12-2018, 10:44   #28 (permalink)
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I have a small word, G930F, G935F - double IMEI in "Repair"?
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Old 05-13-2018, 08:56   #29 (permalink)
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Here is what cert file should look like, imeisign2, pubkey2 and pubkeysign2 should be same is the imeisign, pubkey, pubkeysign.

;Z3X Samsung CERT file
;Please do not edit this file
[cert]
Model=SM-G935F
SerNo=xxxxxxxxxxx
IMEI=xxxxxxxxxxxxxxxx
ImeiSign=xxxxxxxxxxxxxxxx
PubKey=xxxxxxxxxxxxxxxx
PubKeySign=xxxxxxxxxxxxxxxx
IMEI2=xxxxxxxxxxxxxxxx
ImeiSign2=xxxxxxxxxxxxxxxx
PubKey2=xxxxxxxxxxxxxxxx
PubKeySign2=xxxxxxxxxxxxxxxx

I know SM-G935F works, but I have never tried it on the SM-G930F version which is non-edge. The main board has SM-G930FD, SM-G930F/W8.

So I assume the hardware is there but the same cert procedure and dual sim tray applies.

When doing dual sim you do not use imei repair, patch certificate at all. All that is needed is read the cert, edit the cert that was read and saved, write the edited cert to the phone and that's it. It will even survive factory reset / updates as it's cert.
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Old 10-20-2018, 22:46   #30 (permalink)
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I have solution and i have file to convert very easy in 5 menuts you can chang
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