Database Users

Can somebody tell me about this locked MF3 issue?

I just bought a galaxy s 4 off craigslist and its on the MF3 baseband. Does this stop me from flashing ROMs? What do I need to do to fix this?
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I would start by checking out post #2 in my I337 guide.

xBeerdroiDx said:
I would start by checking out post #2 in my I337 guide.
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Click to collapse
I was actually just reading that over, but I'm still a tad confused about what ROM this is on. I have a splash screen when I boot that says "samsung" but below it says "custom" with an unlocked lock, and the rom is JDQ39.I337UCUAMF3, which makes me think that dude unlocked the bootloader and flashed a custom (leaked?) version of MF3. Still searching around to find if thats actually the case of not
Thank you for making this guide

Lubricate your eyes and enjoy the reading material in the "General Section" followed by the "Q&A Section" cause your going to want to educate yourself about this pain in the A?? Att locked down phone. its bootloader locked/write protected enabled .look into Safestrap
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And also kingo root method.
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jball said:
Lubricate your eyes and enjoy the reading material in the "General Section" followed by the "Q&A Section" cause your going to want to educate yourself about this pain in the A?? Att locked down phone. its bootloader locked/write protected enabled .look into Safestrap
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Great. The touchwiz ROM on this is horrible. Im assuming safe strap will allow me to flash some custom ROMs? I miss cyanogen
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whitesox311 said:
Great. The touchwiz ROM on this is horrible. Im assuming safe strap will allow me to flash some custom ROMs? I miss cyanogen
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Click to collapse
yes. touchwiz based 4.2 roms only.
http://blog.hash-of-codes.com/how-to-safestrap/
http://forum.xda-developers.com/showthread.php?t=2428254
http://forum.xda-developers.com/showthread.php?t=2448925

deadenz said:
yes. touchwiz based 4.2 roms only.
http://blog.hash-of-codes.com/how-to-safestrap/
http://forum.xda-developers.com/showthread.php?t=2428254
http://forum.xda-developers.com/showthread.php?t=2448925
Click to expand...
Click to collapse
good deal, thanks for the help guys.

Not all TW roms are bad.just try out some different roms like you would a bootloader unlocked phone.i found Darthstalker to be pretty good.
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So I have an MF3 S4 and I want to root it

Like the title says kinda just looking to see how screwed id be on wanting to root this and put something like Task650s ROM on my new S4 and KTs Kernel
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chrisj22 said:
Like the title says kinda just looking to see how screwed id be on wanting to root this and put something like Task650s ROM on my new S4 and KTs Kernel
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Click to expand...
Click to collapse
Search and read before posting and you'll be rewarded

chrisj22 said:
Like the title says kinda just looking to see how screwed id be on wanting to root this and put something like Task650s ROM on my new S4 and KTs Kernel
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Click to collapse
Your a senior member so you know better."GENERAL SECTION".
Just braking your b?lls a bit.
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chrisj22 said:
Like the title says kinda just looking to see how screwed id be on wanting to root this and put something like Task650s ROM on my new S4 and KTs Kernel
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Click to collapse
Firstly, start here... http://forum.xda-developers.com/showpost.php?p=42320414&postcount=2
The fact that your are running the MF3 bootloader will prevent you from flashing any custom kernels due to the blown qFuse. Your only option as of right now is to root your device either using Kingo or jortex's root exploit. From their your need to install Hashcode's Safestrap Recovery and go from there with TouchWiz based ROM's for MF3.

jball said:
Your a senior member so you know better."GENERAL SECTION".
Just braking your b?lls a bit.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
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Click to collapse
So no options for overclocking or undervolting for me?
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chrisj22 said:
So no options for overclocking or undervolting for me?
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Click to collapse
Thats correct no custom kernels witch means no overclocking,I think with rom toolbox you can change the voltages.
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just asking to see if there's any last hope for it but whats LOKI? ive heard about it in the past. Ive seen on KT's Kernel thread it would work on TW but im guessing it wont work for me being the qfuse issue.
Also if none of these are an option whats the point anymore to root? my old S3 was amazing and i loved flashing new things on it but it seems so locked down now to where the only real benefit of rooting is bloatware removal.
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app[/QUOTE]

chrisj22 said:
just asking to see if there's any last hope for it but whats LOKI? ive heard about it in the past. Ive seen on KT's Kernel thread it would work on TW but im guessing it wont work for me being the qfuse issue.
Also if none of these are an option whats the point anymore to root? my old S3 was amazing and i loved flashing new things on it but it seems so locked down now to where the only real benefit of rooting is bloatware removal.
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Click to collapse
There is a lot of information about "LOKI" and "Rooting" in the General, Development, and Original Development sections.

This phone frustrates the **** out of me. So its rooted and all that with safestrap and when I flash a TW rom all it says is go to slot one and ceeate that and wipe the phone and install and when I do that and reboot all I get os a black screen with a blue led at the top
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chrisj22 said:
This phone frustrates the **** out of me. So its rooted and all that with safestrap and when I flash a TW rom all it says is go to slot one and ceeate that and wipe the phone and install and when I do that and reboot all I get os a black screen with a blue led at the top
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Click to collapse
Use the MF3 Odin files, go back to stock and try again. Are you positive you didn't accidentally flash your TouchWiz ROM to the stock slot? Also... was what ROM was it?

I tried StockUp MJ6 4.3 TW rom. When id flash id do tue wipe it says in the instructions and then go and create rom slot 1 and install to that and then reboot to no avail. Ill have to try the stock ODIN when I get home
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chrisj22 said:
I tried StockUp MJ6 4.3 TW rom. When id flash id do tue wipe it says in the instructions and then go and create rom slot 1 and install to that and then reboot to no avail. Ill have to try the stock ODIN when I get home
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Click to collapse
You need to use the 4.2, not 4.3 in ss.

Im hoping Flight5 4.2.2 TW will work ill try it when I get home. It saying I can flash a LOKId version of KTs kernel I didnt think that was possible on MF3
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chrisj22 said:
Im hoping Flight5 4.2.2 TW will work ill try it when I get home. It saying I can flash a LOKId version of KTs kernel I didnt think that was possible on MF3
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you still have to use loki, sir, you have a lot of reading to do, please check out the stickies in the general forum, before you really wind up with a expensive paper weight.

jd1639 said:
You need to use the 4.2, not 4.3 in ss.
Click to expand...
Click to collapse
Flight5 flashed well and nlKTs kernel didnt w9rk like I figured. It does seem abit faster but as far as benchmark scores its the same. FYI to anyone reading this if you want an S4 and want the non MF3 go to RadioShack and buy your phone. At our store we got 12 of the good S4s in stock
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[Q] URGENT: Sprint to T-mobile or Metro PCS ?

Anyway i can Domestic Sim unlock or flash my SPH-L720 to T-Mobile or Metro PCS ?
I'm using 4.3 MK2 and can't seem to downgrade in order to sim unlock through the normal method

I would say to call sprint to get it unlocked but seems like you haven't paid your bill or have a bad ESN
Sent from my SPH-L720 using Tapatalk

Brainfeederz said:
Anyway i can Domestic Sim unlock or flash my SPH-L720 to T-Mobile or Metro PCS ?
I'm using 4.3 MK2 and can't seem to downgrade in order to sim unlock through the normal method
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I haven't found a downgrade method anywhere and the only way to achieve domestic unlock is through mdc modem.
daniel4653 said:
I would say to call sprint to get it unlocked but seems like you haven't paid your bill or have a bad ESN
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That would be for an international unlock.
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I got mine unlocked NP and my friends actually ... He's got att I got T-Mobile rocking h+ on both
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cautious911 said:
I got mine unlocked NP and my friends actually ... He's got att I got T-Mobile rocking h+ on both
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How did you unlock it ?

Brainfeederz said:
Anyway i can Domestic Sim unlock or flash my SPH-L720 to T-Mobile or Metro PCS ?
I'm using 4.3 MK2 and can't seem to downgrade in order to sim unlock through the normal method
Click to expand...
Click to collapse
I think you just have to install the MDC modem not the entire firmware. Go to the all sprint firmware post and install the mdc modem. Follow the unlocking steps and then you can go back to the MK2 modem after unlock.

cruise350 said:
I think you just have to install the MDC modem not the entire firmware. Go to the all sprint firmware post and install the mdc modem. Follow the unlocking steps and then you can go back to the MK2 modem after unlock.
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Thanks a lot where are the steps to unlocking it ?

Brainfeederz said:
How did you unlock it ?
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i get FAIL everytime when using odin to flash to mdc modem
this is very frustrating need help

Brainfeederz said:
i get FAIL everytime when using odin to flash to mdc modem
this is very frustrating need help
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Click to collapse
What modem and Baseband are you currently on? If you open device manager do you see two ports for your phone?
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imbmiller said:
What modem and Baseband are you currently on? If you open device manager do you see two ports for your phone?
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Click to collapse
Modem : MK2
Baseband version : L720VPUEMK2

Brainfeederz said:
Modem : MK2
Baseband version : L720VPUEMK2
Click to expand...
Click to collapse
Modem and baseband are the same thing.
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daniel4653 said:
Modem and baseband are the same thing.
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I meant bootloader, I was typing and driving. Also thanks for not helping out this dude at all and instead pointing out a logic fault. Super helpful.
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daniel4653 said:
Modem and baseband are the same thing.
Sent from my SPH-L720 using Tapatalk
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Well i know that i'm suppose to use a mdc modem but on odin when i try to install it . it fails all the time
Any way around this or a solution to go from mk2 to a mdc modem so i can domestic unlock my phone ?

Brainfeederz said:
Modem : MK2
Baseband version : L720VPUEMK2
Click to expand...
Click to collapse
As of now you can't downgrade the modem on mk2 or mja if you took an OTA update to get there. If you flashed your way there and kept mf9 you can downgrade easily.
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imbmiller said:
As of now you can't downgrade the modem on mk2 or mja if you took an OTA update to get there. If you flashed your way there and kept mf9 you can downgrade easily.
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Okay thanks i'll just have to be patient then and wait it out
Been reading your unlock guide for the past 2-3 days

imbmiller said:
I meant bootloader, I was typing and driving. Also thanks for not helping out this dude at all and instead pointing out a logic fault. Super helpful.
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Click to collapse
I didn't quote you at all dude so relax.
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---------- Post added at 04:16 PM ---------- Previous post was at 04:14 PM ----------
Brainfeederz said:
Okay thanks i'll just have to be patient then and wait it out
Been reading your unlock guide for the past 2-3 days
Click to expand...
Click to collapse
Yeah might be some time from now. Its been like 2 months since MJA release and no one has found a way to downgrade.
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imbmiller said:
As of now you can't downgrade the modem on mk2 or mja if you took an OTA update to get there. If you flashed your way there and kept mf9 you can downgrade easily.
Sent from my SPH-L720 using XDA Premium 4 mobile app
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Click to collapse
Okay thanks I'll just wait until the mk2 downgrade is available
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Running mk2 stock want to flash mdc modem for unlocking

I'm trying to domestic unlock my phone but everytime i try to flash the mdc modem using odin, i get FAIL all the time
what am i doing wrong ?

Once on mf9/mk2 you can't flash back/downgrade due to knox bootloader from my understanding. Search forums to be sure.

patrockss said:
Once on mf9/mk2 you can't flash back/downgrade due to knox bootloader from my understanding. Search forums to be sure.
Click to expand...
Click to collapse
so theres no way i can domestic unlock my gs4 ?

Sorry my knowledge of unlocking is limited. You can apparently flash the modem and unlock. Possible you got a bad download?

Brainfeederz said:
I'm trying to domestic unlock my phone but everytime i try to flash the mdc modem using odin, i get FAIL all the time
what am i doing wrong ?
Click to expand...
Click to collapse
There is one thread about Rooting w Knox but its the one b4 your build, however he may know more about it, you could start there. Btw can you send me the link dealing w the MDC unlck method. I saw it once but cant seem to find it, was gona do the same myself

StifflerServices said:
There is one thread about Rooting w Knox but its the one b4 your build, however he may know more about it, you could start there. Btw can you send me the link dealing w the MDC unlck method. I saw it once but cant seem to find it, was gona do the same myself
Click to expand...
Click to collapse
Can you link me to that thread ?
And here's the guide
http://forum.xda-developers.com/showthread.php?t=2530610
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And here's the guide
http://forum.xda-developers.com/showthread.php?t=2530610
Sent from my SPH-L720 using XDA Premium 4 mobile app[/QUOTE]
this looks interesting.

runwithme said:
Did you try asking Sprint to unlock the device?
---------- Post added at 09:36 AM ---------- Previous post was at 09:21 AM ----------
this looks interesting.
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Click to collapse
Sprint won't perform a domestic unlock
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Brainfeederz said:
Sprint won't perform a domestic unlock
Sent from my SPH-L720 using XDA Premium 4 mobile app
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Click to collapse
Its still the same as international unlock. If sprint unlocks it you have to manually change settings so it will be used domesticly
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[Q] How to unlock bootloader on galaxy s4 i337 (at&t)

i have searched on google and youtube but couldn't find anything which unlock the Boot-loader on galaxy s4 i337.
i want to unlock the boot-loader on my phone otherwise i can not be able to Flash custom recovery & OS, when ever i tried to flash something it ends up being FAILED!. i don't know why?
any help will be appreciated. THANK YOU!

danialkhan said:
i have searched on google and youtube but couldn't find anything which unlock the Boot-loader on galaxy s4 i337.
i want to unlock the boot-loader on my phone otherwise i can not be able to Flash custom recovery & OS, when ever i tried to flash something it ends up being FAILED!. i don't know why?
any help will be appreciated. THANK YOU!
Click to expand...
Click to collapse
you can't unlock it. If you have MDL firmware you can use an exploit but if you are on MK2 of MF3 its completely locked down
Read the all in one guide in the general section by XbeerdroidX

Ok
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danialkhan said:
Ok
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What is your firmware ? What version android are you on ?

Build mk2. Android 4.3
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danialkhan said:
Build mk2. Android 4.3
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This thread is perfect for u by @guut13 http://forum.xda-developers.com/showthread.php?t=2616221.... root it with safe root method. .... install Safestrap v3.71..... and there a list of compatible custom 4.3 rom that u can install. ..... good luck. ...:thumbup:
Swyped from MK2 Dark Carnage SS Edition