[Q&A] [REF] LG Optimus FUEL lgl34c

[reemobeens19]

I picked up this device from walmart for $29.99 with the intentions of learning some new development stuff.I
thought for 30 bucks there's gonna be a lot of these little "duallies" running around why not a cheap candidate?
So far as i can tell there is little info found about this device so I'm looking to collect what little is known about
it in one place in hopes to get a jump on it. First things first, I am responsible for my own actions as you are yours.
If your not sure ask or simply dont do, some of this stuff can brick your device!

*ROOT*
These are the instructions I followed to root.
http://www.androidarea51.com/all-things-root/working-root-for-lg-optimus-fuel-woot/
dont forget to install supersu
https://play.google.com/store/apps/details?id=eu.chainfire.supersu&hl=en
and busybox afterwards!
https://play.google.com/store/apps/details?id=stericson.busybox&hl=en


*RECOVERY*
Downloaded "TWRP Manager" from play store.
twrp settings, I enabled the sd card patch.
Install twrp\device name :l34c\version i instaled: openrecovery-twrp-2.8.4.0-l34c.img
click install... wait... things will pop up..... things will go away... wait some more...
finally a dialogue that states sucess.
***ISSUES HAVE BEEN REPORTED OF LOSING RECOVERY OR THE ABILITY TO ENTER IT AFTER
A WIPE AS WELL AS PROBLEMS BACKING UP AND OR RESTORING.
I have "injected" twrp manager into the system using titanium backup (link2sd will work also). This seems to
prevent any issues I have read about previously mentioned. Also I have successfully preformed backups as
well as restores, both before and after wiping. I have not figured out how to enter twrp recovery upon boot
yet, so be careful of what you do!

*SAFE TO REMOVE APPS*
yet to come
I use "titanium backup" from the play store, still trimming.I can get it down to about 230MB
available "free" ram at the moment but not consistently.

Ok had an issue with a task manager improperly reporting free available ram... true availability was
around 150mb free. There are apps that have to be replaced when removed, for example a launcher
for a launcher but some do not. Again I'm still trimming and experimenting, right now my system rom
around 244mb free. Most every thing I have done has been on the phone its self without the need of a P.C.

*STOCK BACK UP*
Yet to come
Any candidates for a true stock rom? Ive hacked the crap out of this one so far without the need of a back up... i know tisk tisk tisk!
I'm going for a debloated deodexed stock rom, hopefully!

*DRIVERS*
The only ones I could find that actually work. The Verizon drivers mentioned for the g2, not surprising since it runs on vz towers!
http://forum.xda-developers.com/showthread.php?t=2432476

*TETHERING*
using the android wifi tether 3.3beta2
https://code.google.com/p/android-wifi-tether/
all settings untouched except
device profile
lg optimus 3d
device access does work as well as encryption

*XPOSED*
Does work, im using 2.6.1.

*DPI*
The app I'm using for safe keeping to test dpi settings
https://play.google.com/store/apps/details?id=com.oumugai.densityadjuster
200 not working
170 works
160 native
150 works
140 works
130 works
120 works (looks good)
110 works
Temporarily went back to native dpi for debloating purposes. Will revisit later.

After messing with DPI settings I'm having a"contacts has stopped working " when tapping on the phone app.
DPI set to 120 when I noticed. All dpi switches affect lg home launcher
so you will need another launcher.


ok so far thats what i got. whats the nexts step to a stock AOSP rom?
questions and/or constructive comments wecome

 

[reemobeens19]

reserved

 

[DrPhant0m]

I've got a few of these that are bootlooping. They show the LG logo, and then TracPhone Wireless splash screen infinitely in a loop.

Two questions.
1 - Is there any way to recover them? I'm hoping for some sort of a dev tool that I could flash a stock image or something (like Odin is for Samsung phones)

2- When these phones started bootlooping, I installed TWRP on the other Fuels that I have, thinking that I didn't want it to happen to them. My understanding of the TWRP that's installed from TWRP manager doesn't flash a modified boot image, so you can't enter TWRP from a powered off (or in my case, bootlooping) phone. Is that correct? I flashed a custom boot image from elsewhere that allows me to tap vol up at the LG logo to boot to TWRP. Any idea if this is enough of a safeguard to in the even of similar boot loops?

 

[supermaxkato]

Any chance you know how to get it in diag mode? I need to connect it to DFS but can't without diag. Thanks for your help!

 

[reemobeens19]

I've got a few of these that are bootlooping. They show the LG logo, and then TracPhone Wireless splash screen infinitely in a loop.

Two questions.
1 - Is there any way to recover them? I'm hoping for some sort of a dev tool that I could flash a stock image or something (like Odin is for Samsung phones)

2- When these phones started bootlooping, I installed TWRP on the other Fuels that I have, thinking that I didn't want it to happen to them. My understanding of the TWRP that's installed from TWRP manager doesn't flash a modified boot image, so you can't enter TWRP from a powered off (or in my case, bootlooping) phone. Is that correct? I flashed a custom boot image from elsewhere that allows me to tap vol up at the LG logo to boot to TWRP. Any idea if this is enough of a safeguard to in the even of similar boot loops?

My apologies for the delayed response. I have a lot going on in life.
As for recovering them, use the device you have closest to stock to make a backup. Do this before you attach your account or put any thing in to it after a "fresh wipe". To the best of my knowledge there isnt a tool like odin available, i could be wrong though. You can push a back up to the looping devices via adb. in order to do this you must have previously enabled usb debugging. The instructions are available on the web, i my self dont know how to do this. If you can establish an adb connection im sure you can command it to boot into twrp. For setup and testing use one of the devices that doesnt have a problem to establish adb. There is a little info on another thread i created about investigating the boot process the link is in my signature for the defy. Please be patient with me as i have two jobs and a single father, im not a hacker or developer. just a normal guy that is fascinated by my little robot willing to learn any thing. now that I know this thread is becoming active Ill monitor a little closer. Also if there is any thing i can help with ill be glad to do so. Im wanting to get a second fuel just for dev and learning purposes.

 

[T0X1K01]

Recovery

Is there a way to access recovery on the lg fuel? I am stuck in a boot loop because I disabled the home screen service as well as other things that I did not pay attention to. I do not have a custom recovery installed.

 

[reemobeens19]

I've never been able to boot to recovery by way of button press. Seems like there's a way to get into boot loader mode though. Just can't remember off the top of my head, I'm at work now and don't have the fuel with me. I'll see what I can figure out in a few hours when I get home. In the mean time you can try button combos upon boot to include the home button. If we can get ADB talking to it there's a chance I can send you copies of the files needed. Give me more details of what you have done just before the boot looping.

Sent from my ALCATEL A564C using XDA Free mobile app

 

[switch81]

I bought the optimus fuel a few months ago and i've been using it primarily for a music player/run keeping devices during my jogs. I turned off mobile data and i've noticed that i still see signal bars on the top notification area - does this mean that the radios are still on?

I was wondering if there was some way to completely disable the cellular radios so that i could conserve battery life inbetween days where I don't run?

Thanks!

 

[reemobeens19]

This is a pretty cool app....
https://play.google.com/store/apps/details?id=com.latedroid.juicedefender

Airplane mode and then turn WiFi back on does the trick. "Radios off" = ton more juice

 

[GuestK00337]

Has anyone found out anything else for this little phone? I have the LG Optimus Fuel. Had it for a few months now. I rooted it as soon as I got it and uninstalled a few system apps like the LG keyboard, the default SMS app and Chrome along with 2 or 3 other Google apps. It's still running fine.

I installed TWRP recovery and a custom boot image so I could boot into recovery by pressing the up volume button. Works great. I made a full system backup and saved it to my external SD card and saved it to my Debian laptop.

Right now I'm just looking for a custom ROM for this little phone but can't find one. I'd love to get Cyanogenmod on this phone but there are none. I'd port it myself but I'm not able to at the moment.

 

[DaveCT]

...
*ROOT*
These are the instructions I followed to root.
http://www.androidarea51.com/all-things-root/working-root-for-lg-optimus-fuel-woot/
...

I'll expand on the above link because no one can view all of the info in that thread w/o registering for that site [PITA].
Load towelroot (www.towelroot.com). Upon running towelroot, press "welcome to towelroot v3" 3-times (quickly). Change 1337 0 1 0 4 0 to 1337 0 0 0 4 0 (change only the ONE to a ZERO), click "make it ra1n" and you're rooted. :good:
This was verified on an L34C running Android 4.4, Kernel 3.4.0+, build KRT16S.L34CV10c, Sw ver L34CV10c.

YMMV; IANAL

 

[reemobeens19]

My apologies for the inconvenience, I was unaware for the need to register.

 

[jelabarre59]

What I would like to do with the L34C is find a ROM with all the phone functionality removed, and few to no Google Apps (let me just add the ones I need). I am not planning on using it as a phone (I still have my old Casio flip-phone, need nothing else). My intention was to experiment with creating a PalmPDA "replacement", something small to carry around for addresses, notes/memos, calendar (you know, the stuff you used to do on PalmOS), and in addition figure out how to do record-level synchronization **locally** (as in I don't need to send my data to some dirt-floor shack in Bangalore just to have it sent back to a device 2 feet away from my computer). Additionally, would line to use it as a basic portable media player. Essentially, trying to re-create the Palm LifeDrive on Android.

 

[reemobeens19]

To my knowledge there are no roms available for this device. Your best bet in my opinion is to remove apps 1 by 1 after rooting. Google each and find out what the risk and severity of removing them are. I have donated my device to a less fortunate fellow employee. So as of now I'm unable to help with testing. This method is what I do for all of my devices until I'm finally happy with its performance and functionality. Think of Android as the swiss army knife of the computer world, you can do just about any thing with it, you just gotta figure out what tools are useful to you and the ones you can do with out, then you gotta ask Google witch ones Android can function with out. I hope you find what your looking for in the little robot, its a really neat world inside there!

 

[Casey Stellar]

I hate to bump an old thread but, I also don't it necessary to start a new one, at least not yet anyway but, I too am looking for a way to flash stock ROM. I have LG34Cs to use as a reference..

 

[Crashoverride1993]

Where is the link to exposed framework at for this phone?

 

[majexuj]

All official twrp 3 images are broken on official site. Last good working was 2.8.7.0.

Here is working twrp 3.1.1 if anyone interested:

mega.nz/#!I0lhAYAY!fRbQtQjYFI2kiJOD0FSEBPnBJm0JZxpiBaw52kyOfQE

 

[Mac23]

All official twrp 3 images are broken on official site. Last good working was 2.8.7.0.]

What does broken mean in detail? Do I risk to brick my L34C when I flash official twrp 3 images?

 

[maiexuj]

What does broken mean in detail? Do I risk to brick my L34C when I flash official twrp 3 images?

Broken as in doesn't boot into recovery. The phone will still boot into android, assuming you have a working system, and within android with root you can flash a working recovery image over a broken flash with the dd command on the twrp device info page (twrp.me/lg/lgoptimusfuel.html). So no real risk of brick, just possible inconvenience that might require a battery pull.

I built twrp 3.2.1 with same sources but I have not tested it since my battery seems to have completely died and the phone won't boot with usb power alone.

Here is link anyway in case anyone is interested:

mega.nz/#!ssExSY7S!_B3FcAmclzRwCKTX461Tl_QhpdwwK0tmvhL-6zkKLRw

 

[TheExploitedOne]

---