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Root [MetroPCS] Most stable root method for 12b

You could leave kingo up and just let people know that it can take many attempts.

I've rooted twice already with kingo by itself. Framaroot and saferoot are not needed since they do absolutely nothing to help the rooting process.

Can someone verify kingo root without all the other unnecessary steps work? Basically:

1. Reset to Stock 12B firmware
2. Enable debugging mode
3. Download kingo root & run in camera mode?

Step 3 may take many tries. This would seem like the simplest way to get root on 12b, instead of flashing & messing with CWM & possibly bricking. (not to mention unnecessary steps can introduce trojans and malware)
 
Any new developments with the root method? Many attempts to no avail here. Softbricked after font install with Rom toolbox.recoverd with lgetool. Really don't wanna attempt a downgrade. Kinda scared since i hardbricked two of these phones already. (Qh-usb) crap,or whatever it was.
 
I'm noticing since the update also, that my Pandora's music is resuming. after hanging up on the phone,which I've had a problem with that ever since I bought the phone so I think that might have been one of the fixes. just putting that out there.
 
Kingo didn't work for me on 12b. OTA Rootkeeper worked for me coming from rooted 10i. Some of this info is from the OP, but I'm consolidating it here. I can't post links, so you'll have to do some searching.

Start here if you're on 12b:
1. Use info in OP to downgrade to 10i. You should be able to use the drivers you have if you've already got them installed.
2. Root using the procedure for 10i (saferoot).

Start here if you're on rooted 10i:

3. Install and run OTA Rootkeeper from Play Store. Tell it to make a backup.
4. Install OTA update (it might take some time for it to popup).
5. Run OTA Rootkeeper and restore su backup. Reboot.

Seems like a long process, but it's better than constantly running Kingo in hopes that it will work. This should work consistently. I'm assuming you'll have to re-downgrade to 10i and re-root if you reset, but hopefully there will be a method to root 12b directly soon.

It doesn't make sense that some people have had success after running Kingo for hours. If the vulnerabilities have been patched, the exploits won't work - it doesn't matter how many times you try.
 
It doesn't make sense that some people have had success after running Kingo for hours. If the vulnerabilities have been patched, the exploits won't work - it doesn't matter how many times you try.

Kingo hasn't been patched. It was saferoot and framaroot that were patched. Some exploits with these LG phones take multiple attempts. If we receive another update, kingo and root keeper might be patched though. Then we'll have to ask the root god (Bliss) if he can make a root for us.
 
Kingo hasn't been patched. It was saferoot and framaroot that were patched. Some exploits with these LG phones take multiple attempts. If we receive another update, kingo and root keeper might be patched though. Then we'll have to ask the root god (Bliss) if he can make a root for us.

As far as I know, only the Kingo developers know which vulnerability it uses for each device. It's likely that it was using the same vulnerability as saferoot for our device. My best guess as to why some have been able to root 12b and some haven't is the users that have been successful had something in place that prevented a proper kernel update and their kernel was still vulnerable. It would be interesting to see the output of uname -r from users who claim to have used Kingo to root 12b.
 
As far as I know, only the Kingo developers know which vulnerability it uses for each device. It's likely that it was using the same vulnerability as saferoot for our device. My best guess as to why some have been able to root 12b and some haven't is the users that have been successful had something in place that prevented a proper kernel update and their kernel was still vulnerable. It would be interesting to see the output of uname -r from users who claim to have used Kingo to root 12b.

Kingo is open source and uses other open source projects in the app. They list all the open source projects they use and saferoot is not one of them even though saferoot is open source as well. They seem to be using an old exploit called ZergRush which they've modified.

In an official LG update all partitions are updated if not the update fails so it would be impossible for the kernel not to be updated. Only partition not updated is userdata. I don't know why kingo works for some and not for others. You would have to look at zergrush to see how it works for an answer.
 
Like I would give you malware and trojans.. That is ridicules.

Not accusing anyone here of intentionally spreading malware, that would assume people know what they're doing ;) But the OP originally said something like "try these steps, let me know if it works". Well that can inadvertently add unnecessary steps that is unverified and could potentially spread malware.

Kingo is open source and uses other open source projects in the app. They list all the open source projects they use and saferoot is not one of them even though saferoot is open source as well. They seem to be using an old exploit called ZergRush which they've modified.

In an official LG update all partitions are updated if not the update fails so it would be impossible for the kernel not to be updated. Only partition not updated is userdata. I don't know why kingo works for some and not for others. You would have to look at zergrush to see how it works for an answer.

By official LG update, you mean the FULL kdz update? and not OTA? OTAs are only a few megabytes, and possibly doesn't replace all partitions. Or OTA failed some pre-check for the kernel and skipped it, allowing kingo to root afterwards. Since you mentioned here or another thread kingo worked for you, can you report what 'uname -r' says just so we have notes to compare for those who aren't able to root on 12b using kingo.
 
Just for the record. The first f6 i had. I successfully routed (safe root) flashed freedom kernel. And ran ultimatic jarpatch for v6, Without a hitch. Then hard bricked by being careless with a "unlocked bootloader" second one i got, first two steps with first phone work fine, then hard bricked while tying to patch jars.


Thought I'd add that too...

Just seems this phone is unpredictable with adb access?
 
By official LG update, you mean the FULL kdz update? and not OTA? OTAs are only a few megabytes, and possibly doesn't replace all partitions. Or OTA failed some pre-check for the kernel and skipped it, allowing kingo to root afterwards. Since you mentioned here or another thread kingo worked for you, can you report what 'uname -r' says just so we have notes to compare for those who aren't able to root on 12b using kingo.

I upgraded with LG tool then rooted with kingo and so did a few other users. I didn't get the OTA. Anyways, there's a couple other methods now to root 12b so no need to waste time with kingo anymore. ;)
 
I will edit this accordingly when I can confirm this process works other then just my phone. Credit goes to smart for originally posting the steps.

Another root method discovered for 12b here thanks to Nirhazine (i personally have not tested this but its worth a try for anyone willing)
Link

Removed due to many failures to root. will repost when we find a more adequate way to root.

May be able to use kingo by itself may take multiple tries.

For those of you that have gotten it to work good job for those that havent and want to go back to I try this http://androidforums.com/metropcs-t...8-guide-unbrick-unroot-lg-optimus-f3-kdz.html but use http://csmgdl.lgmobile.com/dn/downloader.dev?fileKey=FW857785432109876543213/MS50010i_00.kdz instead of the f3 one

thanks to hubsabubs and duper1 from the f3 side for providing us with these

KDZ...tempted to give it a shot to downgrade. but very reluctant....
 
Just noticed there may be different kingo root versions people may be using that could account for the success rates. The latest one from their official site kingoapp.com is 1.22, dated April 4, 2014.
 
My phone does not get recognized by my laptop, and that is preventing me from rooting my phone, have this happened to anyone else? I just want root to debloat this apparently good phone.
Thanks in advance.
 
Have you tried uninstalling the drivers and reinstalling them

Yes, I tried. I even uninstalled every lg driver I found on my laptop, and tried again. I tried three different usb cables, maybe the phone's micro usb is busted, but I can charge it without any trouble. Not even on download mode it gets recognized, its a bit confusing.
 
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