[GUIDE] LGUP for all (no root needed)

[Ainz_Ooal_Gown]

I want to flash an unlocked LV405UA ( ( Pie: V405UA20a ) to V405QA7 ( Pie : V405QA720a_03_NAO_US_OP_0529.kdz )
I followed the 4 steps of this tutorial but got error : 0x6004, CrossDL USC_US>OPEN_US

Then I replaced DLL with DLL V40 1.9.39.7 ( https://www.mylgphones.com/lgup-dll-for-lg-v40-thinq-version1-9-39-7.html )
And also replaced LGUP_UI_Config_m250n with UI_Config_V40_LGUP_1_16.
But still gave me the same error.

can you share your steps to flash from V405UA to V405QA7 successfully ?
Thanks !

That guide is by Xsavi it says superseded in the title

 

[leepc]

please use this map to confirm if you have band 71 coverage :
https://maps.t-mobile.com/pcc.html?map=mvno-roamd-34l
just drop pin on your area and it will show all the available tmobile frequency,
if you do have b71 coverage, you can dial 277634#*# and go to "band selection" to lock your phone
to b71, and then go to "engineering mode" to check if it is connected to band 71.
wair for your update.

After flashing to v405QA7 , my unlocked AT&T V405UA can make volte and wifi calling on T-Mobile.
No more missing calls indoors !

I can confirm band 2,4,12,66 are working fine on T-Mobile network. I can't verify band 71 because there is almost no 71 coverage in California.

---------- Post added at 10:50 AM ---------- Previous post was at 10:26 AM ----------

That guide is by Xsavi it says superseded in the title

https://www.mylgphones.com/how-to-flash-stock-pie-kdz-firmware-on-lg-v40-thinq-with-lgup.html?amp

That guide above works. I followed the instructions and successfully crossflashed my unlocked V405UA Pie to V405QA7.

 

[Alibaba0101]

After flashing to v405QA7 , my unlocked AT&T V405UA can make volte and wifi calling on T-Mobile.
No more missing calls indoors !

I can confirm band 2,4,12,66 are working fine on T-Mobile network. I can't verify band 71 because there is almost no 71 coverage in California.

---------- Post added at 10:50 AM ---------- Previous post was at 10:26 AM ----------



https://www.mylgphones.com/how-to-flash-stock-pie-kdz-firmware-on-lg-v40-thinq-with-lgup.html?amp

That guide above works. I followed the instructions and successfully crossflashed my unlocked V405UA Pie to V405QA7.

Awesome! Is your bootloader unlocked? Did you root it?

Where are the volte or wifi settings? I don't see them on my at&t sim card. I think i have to call them to enable it.

 

[Ainz_Ooal_Gown]

After flashing to v405QA7 , my unlocked AT&T V405UA can make volte and wifi calling on T-Mobile.
No more missing calls indoors !

I can confirm band 2,4,12,66 are working fine on T-Mobile network. I can't verify band 71 because there is almost no 71 coverage in California.

---------- Post added at 10:50 AM ---------- Previous post was at 10:26 AM ----------



https://www.mylgphones.com/how-to-flash-stock-pie-kdz-firmware-on-lg-v40-thinq-with-lgup.html?amp

That guide above works. I followed the instructions and successfully crossflashed my unlocked V405UA Pie to V405QA7.

Well of course CMD LGUP 1.15 or 1.14 doesn't give a flying ****, but that's also dangerous if your not careful you can end up with an expensive paperweight

 

[leepc]

Awesome! Is your bootloader unlocked? Did you root it?

Where are the volte or wifi settings? I don't see them on my at&t sim card. I think i have to call them to enable it.

My unlocked V405UA is still unrooted based on Root Checker App.
So I guess it's still boot loader locked.
Before flashing to V405QA firmware, my V405UA always switched to 3G from LTE when making phone calls in T-mobile network.
Now it shows HD" phone calls without stoping LTE. And I can make HD calls through only Wifi too.
check if you turn on "wifi calling" under network/call in setup.

Well of course CMD LGUP 1.15 or 1.14 doesn't give a flying ****, but that's also dangerous if your not careful you can end up with an expensive paperweight

Thanks for the warning about CMD LGUP. I guess I was just lucky. Please educate me more.

I did try your method but unfortunately LGUP 1.16 shows error when cross flashing my LV405UA Pie to LV405QA7 Pie.
That's why I followed the other tutorial to use CMD LGUP 1.15 to make it work.
Why CMD LGUP is dangerous? If it fails, can't I just use regular LGUP 1.16 to flash back my original KDZ ?

 

[phoneissue]

After flashing to v405QA7 , my unlocked AT&T V405UA can make volte and wifi calling on T-Mobile.
No more missing calls indoors !

I can confirm band 2,4,12,66 are working fine on T-Mobile network. I can't verify band 71 because there is almost no 71 coverage in California.

---------- Post added at 10:50 AM ---------- Previous post was at 10:26 AM ----------



https://www.mylgphones.com/how-to-flash-stock-pie-kdz-firmware-on-lg-v40-thinq-with-lgup.html?amp

That guide above works. I followed the instructions and successfully crossflashed my unlocked V405UA Pie to V405QA7.

After flashing V405QA7 to your unlocked AT&T V405UA, can you test it on att sim ( i know you are using tmobile currently) with the following:

1. can you dial 277634#*# or *#546368#*350# to access the service mode and then do band selection?

2. does it support both att volte and wifi calling? I would expect yes because the IMEI is att's, on the other
hand, from @Alibaba0101's reply: https://forum.xda-developers.com/showpost.php?p=80379609&postcount=43,
he does not get or see volte and wifi call setting on his att sim, I think that is because his IMEI is sprint's, not sure if att customer support is willing to add that IMEI to their database to whitelist it for att volte and wifi calling.

so I believe the best shot is to buy AT&T V405UA instead of Sprint V405UA.

wait for your update, thanks.

 

[jspencerg]

Thanks for the guide

Works perfectly Thanks

 

[leepc]

After flashing V405QA7 to your unlocked AT&T V405UA, can you test it on att sim ( i know you are using tmobile currently) with the following:

1. can you dial 277634#*# or *#546368#*350# to access the service mode and then do band selection?

2. does it support both att volte and wifi calling? I would expect yes because the IMEI is att's, on the other
hand, from @Alibaba0101's reply: https://forum.xda-developers.com/showpost.php?p=80379609&postcount=43,
he does not get or see volte and wifi call setting on his att sim, I think that is because his IMEI is sprint's, not sure if att customer support is willing to add that IMEI to their database to whitelist it for att volte and wifi calling.

so I believe the best shot is to buy AT&T V405UA instead of Sprint V405UA.

wait for your update, thanks.

When using ATT sim, V405QA7 Pie doesn't have option to turn on wifi calling and volte. Also can't access service mode by dialing 277634#*#

 

[phoneissue]

When using ATT sim, V405QA7 Pie doesn't have option to turn on wifi calling and volte. Also can't access service mode by dialing 277634#*#

try *#546368#*350#, then field test---modem setting, use band selection to lock band and use engineering mode to check what band you are in. Correction： should use *#546368#*405# for v40, see #50 below

try *#*#4636#*#* and then phone information to check if "volte provisioned" and "wifi calling provisioned" are enabled.

The above code works on v35, hope also work on v40, wait for your update, thanks.

 

[neocyke]

try *#546368#*350#, then field test---modem setting, use band selection to lock band and use engineering mode to check what band you are in.

try *#*#4636#*#* and then phone information to check if "volte provisioned" and "wifi calling provisioned" are enabled.

The above code works on v35, hope also work on v40, wait for your update, thanks.

To access the svc menu, the last 3 numbers after 546368 is the phone model. 350 is for V35. V40s will use 405 or 409 if korean.

 

[phoneissue]

To access the svc menu, the last 3 numbers after 546368 is the phone model. 350 is for V35. V40s will use 405 or 409 if korean.

Thank you for telling me this info！！！！

 

[leepc]

try *#546368#*350#, then field test---modem setting, use band selection to lock band and use engineering mode to check what band you are in. Correction： should use *#546368#*405# for v40, see #50 below

try *#*#4636#*#* and then phone information to check if "volte provisioned" and "wifi calling provisioned" are enabled.

The above code works on v35, hope also work on v40, wait for your update, thanks.

With AT&T sim card, volte provisioned" and "wifi calling provisioned" are disabled. Can't be turned on.

 

[Lediju]

After flashing to v405QA7 , my unlocked AT&T V405UA can make volte and wifi calling on T-Mobile.
No more missing calls indoors !

I can confirm band 2,4,12,66 are working fine on T-Mobile network. I can't verify band 71 because there is almost no 71 coverage in California.

---------- Post added at 10:50 AM ---------- Previous post was at 10:26 AM ----------



https://www.mylgphones.com/how-to-flash-stock-pie-kdz-firmware-on-lg-v40-thinq-with-lgup.html?amp

That guide above works. I followed the instructions and successfully crossflashed my unlocked V405UA Pie to V405QA7.

Can I crossflash an ATT v40 to a Korean firmware?

 

[phoneissue]

With AT&T sim card, volte provisioned" and "wifi calling provisioned" are disabled. Can't be turned on.

i have both v35 usa unlock variant and att variant (cross flashing to usa unlock rom), with cricket sim card, both support att volte (though no wifi calling), that is why I expect your v40 att variant with usa unlock rom should behave the same because the imei is already in att's database. In addition, both my v35 variant support Verizon volte too, wonder if you can visit a local Verizon store to test your v40 on their volte.

 

[racsomar]

OK so I have a sprint model V405U android 8.1 SIM unlocked and I want go to the US Unlocked version V405QA7 Pie.

- using this main post guide is OK?
- OTA updates works?

Thank you

 

[Ainz_Ooal_Gown]

OK so I have a sprint model V405U android 8.1 SIM unlocked and I want go to the US Unlocked version V405QA7 Pie.

- using this main post guide is OK?
- OTA updates works?

Thank you

No OTA won't work you would have to always KDZ to the next release

 

[racsomar]

Thank you. What I did was flash the Verizon version, and now I have OTA updates availables

---------- Post added at 04:34 AM ---------- Previous post was at 04:12 AM ----------

No OTA won't work you would have to always KDZ to the next release

Thank you. What I did was to flash the Verizon firmware and now I have OTA updates availables. So cool

 

[Lediju]

After flashing to v405QA7 , my unlocked AT&T V405UA can make volte and wifi calling on T-Mobile.
No more missing calls indoors !

I can confirm band 2,4,12,66 are working fine on T-Mobile network. I can't verify band 71 because there is almost no 71 coverage in California.

---------- Post added at 10:50 AM ---------- Previous post was at 10:26 AM ----------



https://www.mylgphones.com/how-to-flash-stock-pie-kdz-firmware-on-lg-v40-thinq-with-lgup.html?amp

That guide above works. I followed the instructions and successfully crossflashed my unlocked V405UA Pie to V405QA7.

How did you unlock your LG v40 ATT?

 

[schloop]

i'm getting mixed readings from this. do you need to be BL unlocked to do this? also can you root?

 

[sammibulin]

So I have followed this guide so far but LG UP is not recognizing my device. It does not detect as if it is plugged in. Any help?