LGv40 freezing/ having hard time to get to the home screen . Any help ?

[boodi]

Hi
I have bought a used lg v40 v405ua variant written on box ( which doesnt show sprint or at&t logos/ bloatware or branding) ; I bought it as stuck in bootloop .

I do not know if before it was flashed to this model , or anything else.

After some patience and a number of factory reset I've managed to go over the red lg logo bootload screen freeze, go through the initial settings page and with wifi OFF and no simcard in to arrive to the home page , without freeze ;
I was also able to navigte settings , and to switch to developer / enable oem unlock ON , and usb debugging ON.
I was able to get IMEI , to see it runs Android 9 after factory reset , to read it is v405ua variant , to enter camera and take a pic .

The phone is currently On shows time and date on double tap and I am able still to navigate it into settings with no slow down or freeze .

If I navigate or get into some app with wifi off , or equally if I turn on wifi and it starts exchanging data or updating (?) , then it slows down instantly, usually stuck on a black screen and the 3 android buttons downside , sometimes I am able to push power button and use power menu to turn it off , the majority of times it is freezed and it needs volume down + power button to restart ;
any restart will get it to the lg red logo boot screen , and freeze there ( and I will need to try factory reset/erase ).


I am no expert at all on android/mobiles/recoveries , I can't imagine if it is software that is corrupt or if it is an hardware problem or what else .

I 've read many different threads about unlocking bootloader , rooting (or changing model and else), and I am not sure as there are many options

what should I try from here ?





ps a side information : if I turn on Bluetooth the icon in the tiles menu' blinks on and off , or when I enter the bluetooth activation page and switch it on it remains a pale blue >> in the meanwhile the phone cant see or be seen by any other bluetooth device .

Any help ? thanks all of you who can help me this out

 

[NGOwner]

I recommend you start from scratch.

Start here: https://forum.xda-developers.com/lg-v40/how-to/guide-lgup-root-t3967858

Use LGUP and Download mode to flash the latest version (Oreo or Pie) of the V40 OS to the phone.

[NG]Owner

 

[boodi]

started here :good:https://forum.xda-developers.com/lg-v40/how-to/guide-lgup-root-t3967858

Download These FIles: DLL LGUP UI_Config

v40 with no root ( my case ) :

Step 1. Install the provided LGUP.msi (you should now have C:\Program Files (x86)\LG Electronics\LGUP)
Step 2. Install the provided DLL (you should now have C:\Program Files (x86)\LG Electronics\LGUP\model\Common)
Step 3. Extract the LGUP_UI_Config_m250n_[cxz].zip file anywhere on your computer, then copy or move the file to the common folder (the same one the DLL installs too)
Step 4. Enter download mode and flash any KDZ that is compatible with your device with the Refurbish or Upgrade options.

I did 1. 2. 3.

not sure which "compatible" KDZ should I get , as I don't know which v405UA model is my v40 , .. : supposely there's more v405UA ( different?) models and different KDZ for different v405UA models too ?

 

[NGOwner]

not sure which "compatible" KDZ should I get , as I don't know which v405UA model is my v40 , .. : supposely there's more v405UA ( different?) models and different KDZ for different v405UA models too ?

My recommendation is to cross flash over to the US version (unless you are not in the US).

Grab either the Oreo or Pie version here:

https://lg-firmwares.com/lg-lmv405qa-firmwares/

[NG]Owner

 

[boodi]

I am not in the US ( I am in EU )

 

[boodi]

I am ready at step 3.
OEM developer and USB debugging are switched on , I don't know if I need something else .

+ I still need to understand which "compatible" ( as stated in the lgup thread ) KDZ , among many , to flash it with lgup , and then try the procedure .

 

[boodi]

no luck until now trying with LGUP 1.15 or 1.16
installed both but they do not start / do not show anything any dialog window any app any alert

 

[NGOwner]

no luck until now trying with LGUP 1.15 or 1.16
installed both but they do not start / do not show anything any dialog window any app any alert

That usually means a driver issue. I think you have to have the phone plugged into and recognized by the computer beforre anything will show in LGUP.

As for the kdz, these are the European kdzs: https://lg-firmwares.com/lg-lmv405ebw-firmwares/

[NG]Owner

 

[boodi]

it was an Antivirus ( AVG )

at least , I removed it and then all went straight .

I flashed it with the v405QAe20 kdz with lgup 1.16 - refurbish option . very fast and straight .
Now I have "v405UA20e" listed settings / phone / software ( no v405QA20e as expected ) and should probably try flashing it to a european version (?)

New problem though ........ the phone doesn't freeze anymore , but now it shuts off on his own from time to time

where to go from here ? root ?

 

[boodi]

up

 

[Talysdaddy]

it was an Antivirus ( AVG )

at least , I removed it and then all went straight .

I flashed it with the v405QAe20 kdz with lgup 1.16 - refurbish option . very fast and straight .
Now I have "v405UA20e" listed settings / phone / software ( no v405QA20e as expected ) and should probably try flashing it to a european version (?)

New problem though ........ the phone doesn't freeze anymore , but now it shuts off on his own from time to time

where to go from here ? root ?

It depends dude, are you trying to use it in EU? If yes then it'd be a good idea to flash a stock rom from that area. It enables radios/bands that are used in your area so that you'd have no issues calling/texting or i'net.
The post right above yours links to the appropriate ROMs for you so you should have all you need.
After you've flashed the ROM, I'd do a factory reset, in the settings app, not in recovery unless you have the original email info, otherwise you might trigger FRP and you wouldn't wanna do that. This might help with your reboot issue, in fact I'd do it twice in a row just in case.
There you go, you're all set.

 

[boodi]

I did the factory reset. Problem is ( new...completely) phone have hard time in recharging now......this is *completely new* problem. it came out of nowhere only after last self-switch off( and after flashing the new firmware v405uae20) ; before never showed it . When it was off and I plugged it (before the flash), the phone always got the battery icon showing in the center of the black screen /with the percentage of battery reached.
Now it doesn t.
Or it is an hit and miss ( and it doesn't depend on charger or failing usb port) . Before this the phone has remained alive 4 days without much use and no simcard in, without issues