Need help with signal/modem V20 H910 - LG V20 Questions & Answers

Hi,
I need help with signal issues in EU T-Mobile. I’ve tried to flash different modem images: 10p, 10n, 10f stock h910, vs995 but the phone still doesn’t connect with 3g and 4g. sometimes connects with EDGE GSM but usually has no signal at all. However, the phone automatically downloads APNs for the internet and MMS. Currently, I have installed lineageOS 17.1
Baseband ver: .2.0.1.c3-0045-M8996FAAAANAZM-1

What is EU T-Mobile? Which model do you have? The H910 is not T-Mobile it's AT&T. T-Mobile is H918.
And is this a Lineage issue? Did your signal work on stock?

Related

D800 radio in D801 phone?

I just switched service from Tmobile to ATT. I seem to be having difficulty bouncing between LTE and 3G on the ATT service and wonder if I can safely flash a radio file from the D800 to my D801? I'm currently running the latest 4.4.2 Mahdi rom with Tmobile patch and wonder if that radio file might be an issue?
Thanks

Recommendation for using H910 in Canada and getting updates

I'm considering purchasing a network unlocked LG V20 H910 and using it in Canada. I would like to obtain updates such as Oreo when they become available. My network in Canada is Rogers.
From my review of the sites, it seems like these might be my options
Root the H910 and flash H915 as in this post
https://forum.xda-developers.com/v20/how-to/root-h910-v10m-t3664500
Use the H910 as-is in Canada on the Rogers network, but also purchase an AT&T pre-paid sim card to occasionally connect and get updates.
If I choose option to flash to a H915, I could only find a few KDZ files available.
There are few older files for Videotron at the v10c, v10d, and v10e levels that do not have dirty cow patched.
Some newer files for Rogers and Bell at the v10p and v10q level. If I apply these, I understand that risk being stuck with a phone that cannot be rooted and possibly cannot fix the modem. There may also be signal issues.
What have others done with their H910 releases in Canada?
If I load the Videotron v10e file, would I limited to signing up to Videotron to get updates from their network, or could I updates from another carrier/network?
Are older Roger's KDZ files for the H915 available?
If you get an h910 know that some people have had network issues using it off of ATT. The us carrier phones are finicky and lots of people have reported issues such as no lte, spotty service and such. Flashing the h915 kdz isn't a permanent solution. The modem files will not work on an h910 and you will have no service. ATT wont update the device without their sim, so either you root using the h910 guide and grab update files that people dump or roms available, or you can do exactly as you described and use an active ATT sim to periodically update. You're phone is still an h910 in hardware, so rebranding will not allow it to receive updates from another carriers servers. My recommendation is to a buy a phone that was designed for the network it will be used on or a factory unlocked set (us996). Will keep the headaches to a minimum.

Real-life differences between VS995 and US996 (both unlocked and US Cellular)

Just looking for some clarification here.
I will probably be using this only on Verizon (mvno), though at some point I might like to switch carriers, but if that isn't possible I'll probably live with it.
It appears the US996 is the same as the VS995 except it supports a few more bands.
Am I able to use the US996 (both the unlocked and US Cellular) on Verizon?
Can you actually flash the VS995 firmware onto a US996 (both unlocked and US Cellular)?
If so, then the usable difference between a VS995 and US996 in this case is basically nothing?
If you are planning to use a custom ROM anyway (like Lineage) then is there basically no difference between the 3 models?
I have been using a US996 on Verizon with the VS995 Weta rom for almost a year. I have not gotten Voice over LTE to work, but I have not put in a huge amount of effort. I believe the VS995 has some radio bands the US996 does not, but I have had no issues from that. As far as I can tell everything else works.
I would suggest getting a sim card activated on a Verizon phone and the transferring the sim card to the US996. Verizon would not activate the sim card in the US996 for me.

VS995 weak or no signal in Europe

Hello. I have unlocked Verizon V20 VS995 and I am in Europe. In the urban areas phone works fine with all frequencies, also 4G B3 and B20 frequency, but when I go just outside town it looses network. Any sugestions?
CDMA LGV20 will suffer with those issues in Europe. So just switching to a native LTE/GSM device is the only way...
But I can't understand why the sognal is so weak when phone supports all the frequencies in my country. I even changed antennas (plastic bumpers) but still the same result.
Simple explanation - it is not a HW issue - the root cause is combination of your modem firmware and stock ROM you are using as the LTE/GSM band usage is set to be with lower priority and the modem constantly searches for the CDMA signal firstly...
So, is there anything to fix this? Maybe flash another rom or modem, if I find somehow to root stock Oreo.
If you are in VS995 really (and please check the sticker indication under your battery for that it should state VS995 only without Sat the end) you can roll back to Nougat via kdz flash and unlock the bootloader via DirtySanta, flash custom recovery and flash afterwards AOSP/LOS based roms.
I think I have VS995 because before ota upgrade to Oreo I have installed few KDZ's from the link without any problem. Can you tell me how can I check ARB version of Oreo?
All Verizon ROMS including Oreo are ARB00
Also you might try flashing Oreo Alpha Omega Hybrid ROM firstly and if not happy than try RR roms...
Tried Alpha Omega ans Lineage 15.1 and the situation is the same. Poor signal strenght.
scytalemk said:
Tried Alpha Omega ans Lineage 15.1 and the situation is the same. Poor signal strenght.
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Hi, did you find an answer? I have same problem... shame, lovely phone...
try use it without phone covers... it will get more bars lol

Cross Flash From VS995/Verizon Unlocked to US996/US Unlocked?

I've been looking for a good, inexpensive phone my partner can use on AT&T, T-Mobile and Verizon and I was able to snatch an unlocked VS995 in excellent condition for $70--it just needs the battery replaced soon which I also ordered. The main downside to this model if you're using it on AT&T and T-Mobile is that it doesn't support Band 12 and 17, but I know the US Unlocked variant does. I just received the phone today. I've been searching on the forum for an answer into if this is possible with the VS995 variant and I've seen people say it is using an LG V20 version of LGUP, but haven't found anyone that's confirmed they've been able to do it on the Verizon and not the AT&T variant and the steps they took to do so.
I want to stay on the stock ROM so I'm not looking to root and install a custom one. Is it possible to convert from the VS995 firmware to US996 so I can gain band 12 and 17 while removing the Verizon bloatware and staying on the stock ROM/OS? If so, would anyone one of y'all be kind enough to post the link to a guide or article that details how to do so? I reset the phone to factory settings so thankfully don't have to do a backup. After doing this, is it still possible to receive OTA updates and, if so, are they gonna mess anything up like reverting the phone to stock firmware or the phone's unlocked status?
Thank y'all so much in advance.
I have a vs995 and I flashed it with US996_usa and working great. You need to download the us996 usa version (2.3GB KDZ) at lg-firmwares dot com and flash it with LGUP PATCHED. There is video on Youtube giving detailed instructions. You will be able to find all these easily via google. I don't know how any of this works with the various US carriers or bands as I'm in europe.
DeyEatDaPooPoo said:
I've been looking for a good, inexpensive phone my partner can use on AT&T, T-Mobile and Verizon and I was able to snatch an unlocked VS995 in excellent condition for $70--it just needs the battery replaced soon which I also ordered. The main downside to this model if you're using it on AT&T and T-Mobile is that it doesn't support Band 12 and 17, but I know the US Unlocked variant does. I just received the phone today. I've been searching on the forum for an answer into if this is possible with the VS995 variant and I've seen people say it is using an LG V20 version of LGUP, but haven't found anyone that's confirmed they've been able to do it on the Verizon and not the AT&T variant and the steps they took to do so.
I want to stay on the stock ROM so I'm not looking to root and install a custom one. Is it possible to convert from the VS995 firmware to US996 so I can gain band 12 and 17 while removing the Verizon bloatware and staying on the stock ROM/OS? If so, would anyone one of y'all be kind enough to post the link to a guide or article that details how to do so? I reset the phone to factory settings so thankfully don't have to do a backup. After doing this, is it still possible to receive OTA updates and, if so, are they gonna mess anything up like reverting the phone to stock firmware or the phone's unlocked status?
Thank y'all so much in advance.
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As far as I'm aware, cross-flashing firmware on the V20 won't give you any additional frequency bands unlike some other phones, so you're still limited to what the VS995 has from the beginning. From what I've read, US996 firmware works fine on Verizon except for a few features such as WiFi calling and video calling.
As for AT&T and T-Mobile, you won't get VoLTE or WiFi calling along with the missing LTE bands, so, depending on where you live, overall coverage could be significantly worse than having the H910 (AT&T) and H918 (T-Mobile) models, respectively. Not having VoLTE would be a problem if you were in an LTE-only area without roaming because then you'd have no way to make or receive phone calls.
ezzony said:
I have a vs995 and I flashed it with US996_usa and working great. You need to download the us996 usa version (2.3GB KDZ) at lg-firmwares dot com and flash it with LGUP PATCHED. There is video on Youtube giving detailed instructions. You will be able to find all these easily via google. I don't know how any of this works with the various US carriers or bands as I'm in europe.
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Thank you for the info. Are you referring to this video? I'd watched it before but it's for flashing the stock ROM on a US996 variant and the links in the description don't work.
C D said:
As far as I'm aware, cross-flashing firmware on the V20 won't give you any additional frequency bands unlike some other phones, so you're still limited to what the VS995 has from the beginning. From what I've read, US996 firmware works fine on Verizon except for a few features such as WiFi calling and video calling.
As for AT&T and T-Mobile, you won't get VoLTE or WiFi calling along with the missing LTE bands, so, depending on where you live, overall coverage could be significantly worse than having the H910 (AT&T) and H918 (T-Mobile) models, respectively. Not having VoLTE would be a problem if you were in an LTE-only area without roaming because then you'd have no way to make or receive phone calls.
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Hmm, where did you read that? From what I've read the hardware/modem in the VS995 and US996 version is the same and therefore the difference only comes down to the carrier firmware artificially disabling bands the device supports just like it is on many other smartphones. I could be wrong, but one way to find out would be to do it myself and then try to connect to a Band 12 or 17 tower.
WiFi calling and video calling I'm totally fine with not having. Never used or needed them. With AT&T and Cricket I've never not had service and with Metro the couple times I haven't had T-Mobile service roaming has kicked in and saved the day. Thank you for the info.
DeyEatDaPooPoo said:
Hmm, where did you read that? From what I've read the hardware/modem in the VS995 and US996 version is the same and therefore the difference only comes down to the carrier firmware artificially disabling bands the device supports just like it is on many other smartphones. I could be wrong, but one way to find out would be to do it myself and then try to connect to a Band 12 or 17 tower.
WiFi calling and video calling I'm totally fine with not having. Never used or needed them. With AT&T and Cricket I've never not had service and with Metro the couple times I haven't had T-Mobile service roaming has kicked in and saved the day. Thank you for the info.
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Here's some frequency band info for both the VS995 and US996:
VS995
US996
I'm pretty sure this is a hardware difference, and no firmware change will be able to add more band support unlike some other phones you may have heard about (such as recent U.S. models of Samsung phones). Otherwise, there would have been plenty of discussions and guides around here regarding this (and FWIW, I happen to own a US996, LS997, and H918).
As for LTE Band 12 on the T-Mobile network, only phones that are certified by T-Mobile will be able to access it (more info on compatible phones here). So even though a US996 has the hardware for connecting to Band 12, you wouldn't be able to use it since T-Mobile has blocked access to it and only allows it for the H918 model.
Based on all this, I would expect a VS995 to get LTE Bands 2, 4, and 5 on AT&T and T-Mobile. Of course, since you already have the phone, there's only one way to find out. Just make sure you carefully read the guides/procedures about using LGUP for cross-flashing, and absolutely stay away from any H918 firmware (it will instantly kill any V20 that is not an actual H918). Not sure if there even is a separate guide around here as it is usually mentioned in the initial steps of different rooting guides for each V20 model, but you can find the patched LGUP that ezzony mentioned in this thread (you may have to move the DLL file to a specific folder location for it to work properly).
C D said:
Here's some frequency band info for both the VS995 and US996:
VS995
US996
I'm pretty sure this is a hardware difference, and no firmware change will be able to add more band support unlike some other phones you may have heard about (such as recent U.S. models of Samsung phones). Otherwise, there would have been plenty of discussions and guides around here regarding this (and FWIW, I happen to own a US996, LS997, and H918).
As for LTE Band 12 on the T-Mobile network, only phones that are certified by T-Mobile will be able to access it (more info on compatible phones here). So even though a US996 has the hardware for connecting to Band 12, you wouldn't be able to use it since T-Mobile has blocked access to it and only allows it for the H918 model.
Based on all this, I would expect a VS995 to get LTE Bands 2, 4, and 5 on AT&T and T-Mobile. Of course, since you already have the phone, there's only one way to find out. Just make sure you carefully read the guides/procedures about using LGUP for cross-flashing, and absolutely stay away from any H918 firmware (it will instantly kill any V20 that is not an actual H918). Not sure if there even is a separate guide around here as it is usually mentioned in the initial steps of different rooting guides for each V20 model, but you can find the patched LGUP that ezzony mentioned in this thread (you may have to move the DLL file to a specific folder location for it to work properly).
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Yes, but the Frequency Check website only looks at firmware differences, not the internal hardware. I decided to do some further digging and went to the source that tests these (the FCC) and found that the VS995 and US996 have the same ZNFVS995 FCC ID meaning they share the same internal hardware. Verizon just decided they wanted to be arseholes and cripple the phone's band support in their firmware so it wouldn't work to the best of its abilities on T-Mobile's and AT&T's network. Similarly, T-Mobile decided to also be arseholes by artificially limiting Band 12/VoLTE support to their own H918 model only. I hate that carriers are able to get away with this BS. It is incredibly anti-consumer and infuriating. If the hardware supports XYZ then it should be enabled and capable of taking advantage of it. The FCC tested Band 12/17 to work properly on these and says regarding the device's capabilities:
This device contains the following capabilities: 850/1900 CDMA (BC0, BC1), 850/1900 GSM/GPRS/EDGE, 850/1700/1900 WCDMA/HSPA, Multi-band LTE, 802.11b/g/n/ac WLAN, 802.11a/n/ac UNII, Bluetooth (1x, EDR, LE), NFC LTE Band 12 (698 - 716 MHz) overlaps the entire frequency range of LTE Band 17 (704 - 716 MHz). Therefore, test data provided in this report covers Band 17 as well as Band 12. LTE Band 25 (1850 - 1915 MHz) overlaps the entire frequency range of LTE Band 2 (1850 - 1910 MHz). Therefore, test data provided in this report covers Band 2 as well as Band 25. LTE Band 66 (1710 - 1780 MHz) overlaps the entire frequency range of LTE Band 4 (1710 - 1755 MHz). Therefore, test data provided in this report covers Band 4 as well as Band 66.
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Seriously, f*ck both Verizon and T-Mobile. Thankfully I'm starting my Cricket/AT&T service in a week so I'll be able to test if it can pick up and use Band 12/17. You happen to know of any app or way to force/limit the device to only using one specific LTE band? Thank you so much for linking to that thread for flashing these using LGUP. I'll make sure to follow it and to download the US996 (US Unlocked, not US Cellular) firmware and post a small update on my findings. Thank you so much for all the info. Really appreciate it.
DeyEatDaPooPoo said:
You happen to know of any app or way to force/limit the device to only using one specific LTE band?
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While I've never tried this, have a look at this old thread on LTE band selection from a hidden menu. The dialer code differs by model, so for a VS995 it would be *#546368#*995# and for a US996 *#546368#*996#. The code works for my US996 and H918 on Oreo but not for my LS997 on Nougat (for which there is a separate APK file to access the hidden menu). There are lots of submenus and items in there, so be sure not to accidentally change settings that you're not supposed to.
ezzony said:
I have a vs995 and I flashed it with US996_usa and working great. You need to download the us996 usa version (2.3GB KDZ) at lg-firmwares dot com and flash it with LGUP PATCHED. There is video on Youtube giving detailed instructions. You will be able to find all these easily via google. I don't know how any of this works with the various US carriers or bands as I'm in europe.
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Hello
You crossflash with which android version 9 or 8
If android 9 whats the battery backup (good/bad)
Does the android 9 has a darkmode
Does it brings back or activate the FM radio ?
Thanks
mariowinax said:
Hello
You crossflash with which android version 9 or 8
If android 9 whats the battery backup (good/bad)
Does the android 9 has a darkmode
Does it brings back or activate the FM radio ?
Thanks
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Android 8.
I know Android 9 does not have FM radio because Android 9 is only available for the Korean variant (F800) and it never had FM in the first place.
ezzony said:
I have a vs995 and I flashed it with US996_usa and working great. You need to download the us996 usa version (2.3GB KDZ) at lg-firmwares dot com and flash it with LGUP PATCHED. There is video on Youtube giving detailed instructions. You will be able to find all these easily via google. I don't know how any of this works with the various US carriers or bands as I'm in europe.
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I have heard about converting a vs995 to a us996. How do you do this i have a vs995 and patched lg up do i use the upgrade option or partion dl?
Thanks,
ROMSG
ROMSG said:
I have heard about converting a vs995 to a us996. How do you do this i have a vs995 and patched lg up do i use the upgrade option or partion dl?
Thanks,
ROMSG
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DL partition ignores model codes ...so DL Partition.
ezzony said:
DL partition ignores model codes ...so DL Partition.
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Thanks, now it gives me a partition selection which partitions do i select or do i select all of them?
ROMSG said:
Thanks, now it gives me a partition selection which partitions do i select or do i select all of them?
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All of them seems to work fine.
Will this work in terms of flashing us unlocked firmware or my Verizon LG v20 (vs995) I rooted it successfully, but when I flash these firmware files, the phone is in a bootloop. US996 twrpable zips

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