Just got my LG V40. Is it better off to cross flash it? Can I do anything else to it? - LG V40 Guides, News, & Discussion

So I just got my sprint V40, Model Number LM-V405UA
android version : 9
Android Security Patch: March 1st 2020
And the software version is : V405U20d
Are these all up to date on my model?
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2nd question
What exactly is the benefit of cross flashing the phone with US unlocked KDZ or ATT Unlocked or any other KDZ?
What do you gain from doing it?
is there anything else I can do with my phone to improve it?

1) Yes.
2) & 3) More bands available to you/better compatibility for when you decide to leave Sprint for another carrier (make sure the phone is SIM unlocked first!), plus the ability to connect to more towers if you travel to other countries. Less Sprint bloatware.
4) Unlock bootloader and root device. Take full control of the tech you own!
[NG]Owner

NGOwner said:
1) Yes.
2) & 3) More bands available to you/better compatibility for when you decide to leave Sprint for another carrier (make sure the phone is SIM unlocked first!), plus the ability to connect to more towers if you travel to other countries. Less Sprint bloatware.
4) Unlock bootloader and root device. Take full control of the tech you own!
[NG]Owner
Click to expand...
Click to collapse
I dont actually have sprint, I have Tracfone as my carrier and use the AT&T sim card
which KDZ would be best to use? I looked at LG Firmware and saw US Cellular but there's also the US unlocked one too
The only information i've seen about rooting and unlocking the bootloader is to contact someone that has a octoplus box

aceofpilots said:
I dont actually have sprint, I have Tracfone as my carrier and use the AT&T sim card
which KDZ would be best to use? I looked at LG Firmware and saw US Cellular but there's also the US unlocked one too
The only information i've seen about rooting and unlocking the bootloader is to contact someone that has a octoplus box
Click to expand...
Click to collapse
If you crossflash use the US unlocked.
Look here for unlocking the bootloader.
Once you've done that, rooting is as simple as using TWRP to load Magisk.
[NG]Owner

Get the US unlocked KDZ. I also had the Sprint model. Crossflashing to the US unlocked allowed me to use wifi calling and the additional bands for T-mobile.

smokinu said:
Get the US unlocked KDZ. I also had the Sprint model. Crossflashing to the US unlocked allowed me to use wifi calling and the additional bands for T-mobile.
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i want t buy one for 150 but its sprint . but i have metro . can i just cross flash and then go to tobile n connect it or it has to be sim unlocked also

Related

Flashing Moto G6 with Verizon firmware

I have an unlocked Moto G6 that I am trying to flash with Verizon firmware. Can anyone point me in the right direction? A google search has shown nothing.
fmj77 said:
I have an unlocked Moto G6 that I am trying to flash with Verizon firmware. Can anyone point me in the right direction? A google search has shown nothing.
Click to expand...
Click to collapse
What do you mean by unlocked. There bootloader unlock and sim unlock. Sim unlock just allows you to use another network. Bootloader unlock allows to to flash. Also there is no Verizon firmware to flash because the Verizon model can't be bootloader unlocked which means you can't flash it. Verizon and att are notoriously the worst when it comes to having there phones eligible to be bootloader unlocked
ninjakira said:
What do you mean by unlocked. There bootloader unlock and sim unlock. Sim unlock just allows you to use another network. Bootloader unlock allows to to flash. Also there is no Verizon firmware to flash because the Verizon model can't be bootloader unlocked which means you can't flash it. Verizon and att are notoriously the worst when it comes to having there phones eligible to be bootloader unlocked
Click to expand...
Click to collapse
I guess it's SIM unlocked since I can pretty much use it with any carrier by swapping the SIM card. I bought the phone new and unlocked from Republic Wireless and am trying to get it working with full features with Verizon Prepaid. A couple of folks on Reddit mentioned that I could flash the phone with Verizon software in order to get it to work as if I'd bought the G6 from Verizon.

Is it possible to unlock LG V40 T-Mobile US for use in UK?

Hello. I was iterested in getting a second-hand V40 which happens to be the US T-Mobile version. But i want to use it here in the UK. I've checked the specs and it seems to support all the band numbers which my carrier uses. But I have read that the T-Mobile V40s are somewhat restricted and it is not possible to root or crossflash. Does anyone know if it is possible to unlock for UK use? And if so, how?
Many thanks
What do you mean? Unlock is sum unlocking, root is root, cross flash is cross flash. Dont tell me you got the word unlock mixed up.
Rooting and crossflashing will not unlock the sim carrier for you to use as youll need to unlock before crossflashing. Also why not just go buy an unlocked variant as LG also has the US unlocked version. every manufacturer's unlocked version will always have more radio bands.

[Q] AT&T unlocked on T-Mobile

I have the opportunity to pick up an AT&T unlocked S20FE, and was wondering if it is fully compatible with T-Mobile specifically for 5G/LTE Band 71?
BladeRunner said:
I have the opportunity to pick up an AT&T unlocked S20FE, and was wondering if it is fully compatible with T-Mobile specifically for 5G/LTE Band 71?
Click to expand...
Click to collapse
The answer is, but you must flash the unlocked U1 firmware first and that will work or you can flash the T-Mobile firmware after.
You can stay on the unlocked firmware or flash the T-Mobile afterwards, no real difference. The only thing the AT&T version (flashed or not) won't give you is unlimited roaming on US Cellular. You need an actual T-Mobile branded phone for that.

Force device to update carrier settings SM-G781U

Hello, I'm not a developer; I've never dealt with a rooted device, but Google, Samsung, Verizon and other sources were no help, so I'm here now.
I got a Samsung S20 FE from my old workplace which was previously locked to the ATT network. I am a Verizon customer so I wanted to switch over and I purchased an unlock code from cellunlocker.net. I've reached out to Cellunlocke, but they say the unlock was successful as it is connecting to the VZW network.
I did a factory reset on the phone, put in the Verizon Sim card, and used the network unlock code provided. The unlock said it was successful, but the phone powered on with the ATT logo and downloaded all the ATT factory apps. When I go into the phone dialer settings, it shows ATT video calling, etc... The phone software version shows ATT in the service provider sw version. But it makes calls, texts, etc. and the network settings show it's connected to VZW. The problem is, that it can't access my voicemail or use wifi calling because it's set with the ATT apps and features.
I've tried removing the sim, power cycling, factory resetting, even calling Verizon and asking them to resync the phone to the network. When the sim card is installed in the new phone, VZW shows the S20 as my device, but the phone still thinks it is on the ATT settings. I've viewed the Service Menu *#0011# and it shows that the phone is unlocked.
The phone is showing a service provider software version of
SAOMC_SM-G781U_OYN_ATT_12_0012
ATT/ATT/ATT
Is there any way to force the phone to reset its carrier settings or service provider software? Also, please keep it somewhat simple; I'm learning but not an expert here!
about the only wise thing you can do is download and XAA U1 firmware (Samsung non carrier firmware) flash that with Odin and call it good.
you're getting what you're seeing because the phone won't be able to switch to Verizon firmware as Verizon actually have their own unique version of the FE SM-G781V I believe with physical differences for Verizon's mmwave 5G and the U model can't reset itself to that.
3mel said:
about the only wise thing you can do is download and XAA U1 firmware (Samsung non carrier firmware) flash that with Odin and call it good.
you're getting what you're seeing because the phone won't be able to switch to Verizon firmware as Verizon actually have their own unique version of the FE SM-G781V I believe with physical differences for Verizon's mmwave 5G and the U model can't reset itself to that.
Click to expand...
Click to collapse
So which firmware version do I need? The model printed on the phone is SM-G781u. SamMobile has 781O, B, U, U1, and V for the 781 model.
I'd love to have it without the bloatware Verizon installs, but I need Wifi calling to work and it seems to be a setting in the dialer, rather than the phone.
tbrou6229 said:
So which firmware version do I need? The model printed on the phone is SM-G781u. SamMobile has 781O, B, U, U1, and V for the 781 model.
I'd love to have it without the bloatware Verizon installs, but I need Wifi calling to work and it seems to be a setting in the dialer, rather than the phone.
Click to expand...
Click to collapse
flashing V would be a bad idea, 5G wouldn't work, at least not well. so that leaves U1 which is Samsung unbranded, no carrier apps at all.
3mel said:
flashing V would be a bad idea, 5G wouldn't work, at least not well. so that leaves U1 which is Samsung unbranded, no carrier apps at all.
Click to expand...
Click to collapse
Ok thank you, I'll give it a shot
3mel said:
flashing V would be a bad idea, 5G wouldn't work, at least not well. so that leaves U1 which is Samsung unbranded, no carrier apps at all.
Click to expand...
Click to collapse
I'm looking at the instructions for flashing the device and the instructions say to turn on OEM Unlocking in developer options. I've activated developer options and USB debugging, but do not have the option to turn on OEM Unlocking.
I can't seem to find a way to unlock the bootloader.
tbrou6229 said:
I'm looking at the instructions for flashing the device and the instructions say to turn on OEM Unlocking in developer options. I've activated developer options and USB debugging, but do not have the option to turn on OEM Unlocking.
I can't seem to find a way to unlock the bootloader.
Click to expand...
Click to collapse
to the best of my knowledge you don't need to be unlocked in order to flash signed, official Samsung firmware. many Americans have cross-flashed their phones and none of them could unlock either.
you're just booting into download and opening Odin, it's not much more than that.
3mel said:
to the best of my knowledge you don't need to be unlocked in order to flash signed, official Samsung firmware. many Americans have cross-flashed their phones and none of them could unlock either.
you're just booting into download and opening Odin, it's not much more than that.
Click to expand...
Click to collapse
Awesome, a flash using ODIN seems to have worked; the phone is active and not showing any carrier apps or splash screen. I'm having some other issues; can you suggest which firmware combo would be best?
I used Sammobile.com SM-G781U1 with Country Code USA (Verizon) (VZW)
OR I also downloaded Frija SM-G781U1 with CSC of XAA
Will I notice any major differences in them, or just try each one and check it out?
I am in the US, using the Verizon network. We do not have 5g in the area but the phone and our verizon plan is 5G capable and I would like the option if it exists somewhere I travel to.
I am in the UK, I shouldn't be telling you anything about what firmware is gonna be best over there.
other than U1 XAA I can't tell you much. also be aware that generally you can never downgrade your firmware unless it has the same bootloader version as what you're currently using...
if we were looking at my firmware version number G781BXXU4FVE6
I can only flash something that has a matching 5th last character, that's a 4 in this case. I can only download and flash older firmware if it also has a 4 in the same place in the build number. the phone won't accept anything else.
Sammobile is good for seeing what firmware exists but it's terrible for download speeds. I use Frija mainly but that only gives me the latest version nothing historical.
@3mel thank you for all your help! I've got this device working well on the U1 software and didn't have to reflash it; the rest of my issues resolved. Thanks for your patience in helping this newbie do things to a phone I never would have attempted otherwise!

Question T-Mobile version to Global... Best route currently?

I am looking for the best way to convert my T-Mobile model to the Global version... I'm guessing via Fastboot and fastbootd mode? I've seen a few threads on here but was slightly confused as some people said it worked and some say it didn't? Please advise
Same
Careful, there's no way back unless you pay someone shady. Make sure you are fully network unlocked, because the unlock tool doesn't exist on global
The best way is to buy a global version
Buy it? Is that a thing that happens now?
craznazn said:
Careful, there's no way back unless you pay someone shady. Make sure you are fully network unlocked, because the unlock tool doesn't exist on global
Click to expand...
Click to collapse
Are you aware of one that works?
Loustsoul said:
Are you aware of one that works?
Click to expand...
Click to collapse
No. Check out the other threads on MSM work, it's not pretty.
I've retired my op10, don't have to deal with oppo anymore
Yeah, flashing away from TMobile is possible with the full Downgrade zips iirc. But there's no way back to NE2217, so be careful. I can confirm my NE2215 works great on TMobile but I bought mine from Best Buy, fully unlocked, global edition.
EDIT: Two people have Qualcomm crash dumped now in this thread, it seems the TMO variant (NE2217) does not like to be flashed away in traditional methods.
I'm sure flashing to NE2215 wouldn't harm service, but why would you want to when NE2217 seems to get similar support for now?
Prant said:
Yeah, flashing away from TMobile is possible with the full Downgrade zips iirc. But there's no way back to NE2217, so be careful. I can confirm my NE2215 works great on TMobile but I bought mine from Best Buy, fully unlocked, global edition.
I'm sure flashing to NE2215 wouldn't harm service, but why would you want to when NE2217 seems to get similar support for now?
Click to expand...
Click to collapse
Dual sim and not T-Mobile bloat. Do you know where to get the full downgrade zips?
Loustsoul said:
Dual sim and not T-Mobile bloat. Do you know where to get the full downgrade zips?
Click to expand...
Click to collapse
Dual-Sim doesn't work with NE2215 from what I know, that's an NE2213/1/0 specific feature. Although NE2215 has the contacts for it, I don't think you can actually use the dual sim. Pretty sure the conclusion reached was the 2215 doesn't have a second IMEI from Manufacture.
EDIT: Just googling "OnePlus 10 Pro Downgrade Android 13 to Android 12" You'll find the full rollback zips. There's 3, NA, INDIA, and EU.
Prant said:
Dual-Sim doesn't work with NE2215 from what I know, that's an NE2213/1/0 specific feature. Although NE2215 has the contacts for it, I don't think you can actually use the dual sim. Pretty sure the conclusion reached was the 2215 doesn't have a second IMEI from Manufacture.
EDIT: Just googling "OnePlus 10 Pro Downgrade Android 13 to Android 12" You'll find the full rollback zips. There's 3, NA, INDIA, and EU.
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Click to collapse
What should I use in the US?
Loustsoul said:
What should I use in the US?
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Use NA in the US. But as the other's have said, you won't get dual SIM. If you have already SIM Unlocked your device and won't need to go back to 2217 for any reason, then go for it.
Is the process the same as other models?
If that is the case then why would anyone want to go back to a T-Mobile variant?
Surely the main benefit to change region would be to get timely updates and not be isolated with a rarer model.
I'm just curious as I've had carrier locked devices before and the first thing I did was to change it. In the end I sent my device off to get fixed (unrelated issue) they sent me the unlocked version for my country, I guess being rarer is prevalent not her on XDA but with oppo too.
dladz said:
It's the process the same as other models?
If that is the case then why would anyone want to go back to a T-Mobile variant?
Surely the main benefit to change region would be to get timely updates and not be isolated with a rarer model.
I'm just curious as I've had carrier locked devices before and the first thing I did was to change it. In the end I sent my device off to get fixed (unrelated issue) they sent me the unlocked version for my country, I guess being rarer is prevalent not her on XDA but with oppo too.
Click to expand...
Click to collapse
As I've stated, if you didn't unlock your SIM from T-Mobile (these come locked), you will never be able to unlock it without TMobile rom if you end up on global.
craznazn said:
As I've stated, if you didn't unlock your SIM from T-Mobile (these come locked), you will never be able to unlock it without TMobile rom if you end up on global.
Click to expand...
Click to collapse
So if the user isn't in the need to change sim carrier then that's fine then isn't it..
I'll ask again, is the process for changing region the same?
Bare in mind this isn't for me, I'm in the UK
craznazn said:
Use NA in the US. But as the other's have said, you won't get dual SIM. If you have already SIM Unlocked your device and won't need to go back to 2217 for any reason, then go for it.
Click to expand...
Click to collapse
Boot unlocked sim/network unlocked and rooted with magisk using the boot image for the NE2215.
craznazn said:
As I've stated, if you didn't unlock your SIM from T-Mobile (these come locked), you will never be able to unlock it without TMobile rom if you end up on global.
Click to expand...
Click to collapse
Does sim unlock and network unlock mean the same thing?
Loustsoul said:
Boot unlocked sim/network unlocked and rooted with magisk using the boot image for the NE2215.
Does sim unlock and network unlock mean the same thing?
Click to expand...
Click to collapse
Yep.
If it's the same as the UK, the network has to unlock the phone for you to other sims, usually in the shape of a code you enter..
May be different in the US
Bootloader unlock is a code that you have to get from Oneplus (Token) and you have to have the carrier (T-mobile) unlock the network and they are very reluctant to do it. You have to have paid off the device and have had to be a customer for some time.
Loustsoul said:
Bootloader unlock is a code that you have to get from Oneplus (Token) and you have to have the carrier (T-mobile) unlock the network and they are very reluctant to do it. You have to have paid off the device and have had to be a customer for some time.
Click to expand...
Click to collapse
Then that would be required prior to changing region... I'm not sure why the region would be a requirement to unlock the device to other networks.
May be worth asking the method used for unlocking the device to other networks.
I got them to unlock my network while I'm still paying for the device, I don't want to rock the boat. I'm sure if anyone other than the guy who did it they would lock it down again.

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