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[GUIDE] Sim Unlock Canadian Galaxy S4 i337m 4.3 and 4.4.2

OP veryluckyguy

25th October 2014, 10:12 AM   |  #41  
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I also tried

Heimdall and same error. Secure Check Failed MDM

Quote:

heimdall flash --MDM modem.bin

26th October 2014, 12:17 AM   |  #42  
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IT FINALLY WORKED!!!!!!

After wasting probably an entire day. I finally got the baseband to downgrade.
The problem was that modem that someone posted here on Dropbox. I decided to extract the modem from Samsmobile from the stock 4.2.2 bell firmware and noticed it was different in size by 2Mb. I tried the extracted one and it worked right away. Needed to just flash it once.
19th November 2014, 12:01 AM   |  #43  
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I've been trying to unlock my I257M (locked to Bell) for some time now, tried service menu with no luck, even tried to downgrade the modem (extracting NON-HLOS.bin from the firmwares) NG1 to MK5 using odin so i can unlock the phone using the service menu, but after the modem downgrade the baseband shows 'unknown', no wifi, no sound, no signal. I restore the modem back to NG1 so at least i can get the sound,wifi back.
Any help would be appreciated
SGH-i257m 4.4.2
Baseband: I257MVLUBNG1
Kernel ver: 3.4.0-2254622
Built number: KOT49H.I257MVLUBNG1
4th December 2014, 03:29 AM   |  #44  
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Did anyone who downgraded to unlock lose WiFi and sound on 4.2.2? I have a Bell GS4. Will flashing 4.4.2 firmware restore my Wi-Fi and sound?

Edit: flashing 4.4.2 firmware fixed everything. Was panicing
Last edited by Zehlek; 5th December 2014 at 07:12 PM.
8th December 2014, 09:45 PM   |  #45  
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Quote:
Originally Posted by Zehlek

Did anyone who downgraded to unlock lose WiFi and sound on 4.2.2? I have a Bell GS4. Will flashing 4.4.2 firmware restore my Wi-Fi and sound?

Edit: flashing 4.4.2 firmware fixed everything. Was panicing

Hi, if you go to Odin mode, is your knox warranty void "0x1" ?
8th December 2014, 10:07 PM   |  #46  
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Not it still says official as long as you flash official

---------- Post added at 04:07 PM ---------- Previous post was at 04:07 PM ----------

For root use towelroot
17th December 2014, 12:33 AM   |  #47  
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Unhappy losing WIFI on downloading to 4.2.2
Quote:
Originally Posted by Zehlek

Not it still says official as long as you flash official

---------- Post added at 04:07 PM ---------- Previous post was at 04:07 PM ----------

For root use towelroot

I am on Rogers sgh1337M

Everytime I downgrade to MDJ I Lose WIFI. I try downloading MDJ modem alone same wifi problem, I try downloading entire MDJ firmware same WIFI problwm

What am I doing will be wrong? Any help will be greatly appreciated:

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