• After 15+ years, we've made a big change: Android Forums is now Early Bird Club. Learn more here.

Root lg spectrum stuck on 4g screen

K

kip101

Member
rooted the phone an had no problems downloaded a ics launcher an after a few days uninstalled it ,an for some reason the stock lg launcher didnt pop back up . so i went to reboot an now only boots to 4g screen an nothing else . thanks for any help in advance .
 
I'm having the same problem. I even Factory Reset (hold volumedown + power button) and it goes to the Activation prompt, but reboots itself constantly. No idea what happened, or what steps to take to hopefully unbrick it, if there is. I may just take it back to Verizon and play dumb see if I can get a new one for free seeing as I've only had the phone for 3 days.
 
Interesting. I'll email Dan and see if he has any thoughts.

*edit*

What did you do to the device? Did you remove apps? Freeze any? Flash roms or CWM? I've never heard of a bootloop after rooting, but a few people are reporting the same issue, so I have concerns...
 
I'm really starting to wonder the same MrB. I've been rooted since Dan rooted my phone and have had no issues. I how ever refuse to freeze or uninstall the LGhome app because I have seen too many people have issues with it.

If it's happening after they flashed CWM, then there is a very good chance they did not read the warning about not using CWM to format partitions and not using it to restore nandroid images as it will corrupt the /data partition and cause boot loops.

If it was before installing CWM or if they never installed CWM, then something is getting tweaked/removed/frozen that should not be.
 
Exactly. Freezing apps shouldn't be too detrimental, but if lghome is coded into the skinned version we have, then freezing it might cause problems. I'm inclined to believe they deleted apps or flashed cwm. I'm holding off on cwm til it's more stable and easy (no offense).

I NEVER recommend people remove apps... I always freeze in case there are issues. I learned that lesson with Miui and my d2g; freezing the messaging app prevented mms sending. Again, coded into the rom.
 
For what it's worth, we didn't remove any programs but we did freeze some...there is a lot of bloatware. We did NOT freeze LGHome. I did not attempt installing CWM as that looked kinda scary. :o The odd thing was that the last time an app was frozen was Friday sometime, and it worked fine until late Sunday when it rebooted into the 4G screen. The boot animation works at first then freezes.

I also successfully flashed the firmware which I believe may have removed root? I couldn't get "Unbricking the Easy Way" to work b/c it stopped communicating with the PC.
 
Did you reboot at any time between when you froze apps and the issue started? If no, we can assume it was due to a frozen app. If yes, the frozen apps weren't likely the culprits.

I can't think of why you'd bootloop out of nowhere if there wasn't some change made. Apps and the os don't change out of nowhere, so changes you make are immediately noticeable... That's what makes a delayed issue puzzling.
 
There was no restart so perhaps it was a frozen app. We just tried a factory reset and it worked! No more 4G...it booted. I'm ashamed to say that we didn't try that first.:P

To recap, in order to get the phone past 4G bootloop, I flashed firmware with above instructions then performed a factory reset. Who knows, maybe a factory reset would have worked first? In any case it's no longer rooted but it's operational.
 
How did you flash the firmware if you were bootlooping? Did you use the LGMobile update tool and then 'Recovery Phone' or some other method?

BTW, here's what Dan said:

My exploit leverages a vulnerability to allow me to set the
ro.kernel.qemu property, which essentially tricks the device into
thinking it's an emulator, and subsequently causes ADB to run with root
privileges, allowing me to install su and Superuser. I had no problems
with this approach on any of the Spectrums I tested, but I have heard
reports on other LG devices that setting this property may cause
bootlooping. I'd be a little surprised if this was the case on the
Spectrum - it seems more likely that these people removed some system
application they weren't supposed to. If this is actually a problem for
some Spectrum users, there are plenty of ways I can work around it, but
I don't want to spend the time if it's just users causing problems via
other means.

In either event, doing a factory restore (via recovery menu) will stop
any bootlooping, because the property is set via /data/local.prop, and a
factory restore wipes the /data partition. So feel free to give it a
try, since there's absolutely no risk of harming your device, even if it
fails (which I don't think it will).
Click to expand...

So my question is, how does one get to the recovery menu? Is that pulling battery and holding vol+ & vol -?
 
Nevermind, I found it. It's holding power and volume down @ the same time. From what I understand, this is always available, even if you're bootlooping.
 
To answer your question about flashing firmware while in bootloop; you do it in download mode so the OS is never launched. I *was* concerned that a system reset wouldn't work properly once rooted, although since I didn't try it I don't know if that is true.
 
Hols the power button down until it powers off and then turn it back on. If you have a good restore, it should come back on with no problems.
 
You must log in or register to reply here.
Back
Top Bottom