Develop Bugs

Engineer/Service Mode on OP3

How can I access Engineer/Service mode on my OP3? I would like to view LTE information and select a specific band. It was really easy on my old Samsung. I have tried *#*#83781#*#* and *#*#2637643#*#* -When I type these codes, it diminishes itself and nothing happens. Then I tried the old *#*#4636#*#* but it didn't had that setting to select LTE band. I also tried *#36446337# and *#808# and these also don't have that setting.
Thanks

I join the request

*#801# engineer mode
you can try replacing the x with 1-9 *#80x#
At the moment you can't unlock new lte bands, we need a specific patch for op3 (64bit patch) because NVRAM values will reset after reboot the phone.
I've already tried but my pc don't recognizes op3, so good luck, maybe with a custom kernel will work?

For more information on unlocking bands, join the thread http://forum.xda-developers.com/oneplus-3/help/unlocking-lte-bands-t3425871

NotAxel said:
*#801# engineer mode
you can try replacing the x with 1-9 *#80x#
At the moment you can't unlock new lte bands, we need a specific patch for op3 (64bit patch) because NVRAM values will reset after reboot the phone.
I've already tried but my pc don't recognizes op3, so good luck, maybe with a custom kernel will work?
Click to expand...
Click to collapse
I've tried with all the sequences from 1 to 9 without success. BTW, I read somewhere the Engineer/Service Mode has a setting in the A3000 to switch from Asian configuration to USA configuration. Is it true?. That will fix my LTE issues.

nebtrx said:
BTW, I read somewhere the Engineer/Service Mode has a setting in the A3000 to switch from Asian configuration to USA configuration. Is it true?. That will fix my LTE issues.
Click to expand...
Click to collapse
nope already tried, nothing changes

NotAxel said:
nope already tried, nothing changes
Click to expand...
Click to collapse
Thx!

*#*#4636#*#*

"phone not allowed for voice" error. Any help?

Hello everyone
I have an LG v30+ running stock android 9 with the global v31a rom.
Today I moved to a new carrier, and after installing new sim, the cellular internet works just fine, but voice calls and sms are not working.
I get the "phone not allowed for voice" message and on the taskbar shown on a "MM" icon.
At first I also received an error windows I attached here.
Moving the new sim to another newer xiaomi phone - everything works fine including calls and sms.
Customer service couldn't fix them from their said claiming it's an issue with phone configurations.
Any idea on how to fix this?
Thanks

I just tested another company's sim card and everything works fine.
So it must be some support from the new carrier
Any idea what can be done before I chose another carrier?

What is the model number (Settings -> General -> About phone -> Hardware info)?
Please share a screendump of your Network status screen (Settings -> General -> About phone -> Network). You can blank out the IP address.
Also, please share screendump of the Testing menu Phone information screen (dial *#*#4636#*#* -> Phone information). Scroll it up 3 lines lines so you don't share IMEI, Phone number, IMSI, but so that we can see all the Provisioned lines.
First thing I would try is a Network settings reset (Settings -> General -> Restart & reset -> Network settings reset) then restart the phone.
It is possible that your carrier only provides voice over VoLTE (and SMS over IMS, which is part of the same feature set). That only works if the phone knows the correct settings for your carrier. That would explain why it works with the newer Xiaomi phone. You can check if you have VoLTE settings in the menu (Settings -> Network menu -> Call). Even if the phone does NOT know your carrier, you may be able to configure it through the Hidden menu (depending on your model number). But it is VERY complicated, and you need detailed information from the carrier about the settings to enter.
Or it could be something else entirely.
On a different note, this thread definitely should have been in the Questions section, not in the Guides section.

KamaL said:
Hello everyone
I have an LG v30+ running stock android 9 with the global v31a rom.
Click to expand...
Click to collapse
Not sure why you are calling 31a "global". It's merely the European H930 31a Pie. I've seen a couple of other people use that term and not sure why... It's not "global" in any way than any other KDZ. (EDIT: I see your screenshot where it says global, which is very strange. Is that some setting? That's just weird.)
Unless you actually have an H930 phone, using the H930 KDZ will not give you the H930 bands or anything. You are still using the LTE/HSPA bands that are on your variant. Some people use H930 firmware on H930D/H930DS for different language options and vice versa. So, "global" is quite an exaggeration. Canada H933 has more LTE bands than any of the V30 variants, so it's really the "global" if any are. (But you can't convert to Canada H933 unless you have a compatible North American variant.)
What variant do you have and what country do you live in?

Ahh, so a European H930. Which country are you in, and who is the carrier?

KamaL said:
I just tested another company's sim card and everything works fine.
So it must be some support from the new carrier
Any idea what can be done before I chose another carrier?
Click to expand...
Click to collapse
I don't know where you live and what variant you actually have, but you are using EU H930 31a KDZ.
For instance, if you are in India and using Jio carrier, you need India H930DS KDZ as Jio is VoLTE only. But H930 31a doesn't have Jio's VoLTE settings... Using "another carrier" which allows legacy HSPA during phone calles would then be why it works on the other carrier but not Jio. To fix that you would need to flash India region H930DS firmware.
I am not saying you live in India or using Jio -- you didn't give us any information about that. I am just giving a real life example of why your phone would work on one carrier but not another.
Also, some carriers make you register your phone. If you just stick the same SIM card in you had from previous phone, it sees it's a different phone and will throw up an error message like that until you call them or go into store and tell them what "new" phone you are using. The "other carrier" may not be such a control freak.
---------- Post added at 10:37 AM ---------- Previous post was at 10:28 AM ----------
TheDannemand said:
Ahh, so a European H930. Which country are you in, and who is the carrier?
Click to expand...
Click to collapse
Since he says he has V30+, I know he doesn't have native H930 phone. There are no H930 V30+. The V30+ are H930G and H930DS and neither on them have firmware numbered "31a".
---------- Post added at 10:44 AM ---------- Previous post was at 10:37 AM ----------
KamaL said:
Hello everyone
I have an LG v30+ running stock android 9 with the global v31a rom.
Today I moved to a new carrier, and after installing new sim, the cellular internet works just fine, but voice calls and sms are not working.
I get the "phone not allowed for voice" message and on the taskbar shown on a "MM" icon.
At first I also received an error windows I attached here.
Moving the new sim to another newer xiaomi phone - everything works fine including calls and sms.
Customer service couldn't fix them from their said claiming it's an issue with phone configurations.
Any idea on how to fix this?
Thanks
Click to expand...
Click to collapse
I see posts from you back in November and you have been on 31a for awhile...
https://forum.xda-developers.com/showpost.php?p=81065243&postcount=852
So, any issues have to be with this new carrier as you have had phone calls on 31a for most of a year now.

Sorry, double post

Thanks everyone for the replies.
@TheDannemand
Some more information about my device:
Country: Israel
Carrier: We4G
Hardware version: LH-H930G.
Looking up using my IMEI number on lg-roms website gives this model: LG V30 Plus TD-LTE
I shared the network menu testing menu you mentioned.
I DO NOT see any VOLTE setting in the Call menu.
I already tried network settings reset.
@ChazzMatt
I have the H930G version. Actually I always follow your guides in that thread to upgrade the version, and I've been on this stock firmware for a year. So it must be something related to the carrier settings I think.
I actually didn't use my country's specific KDZ file as it was released a bit late. I used the european version if I remember well.
Should I flash the local one? According to lg-firmwares and lg-roms website it's this one:
Code:
https://lg-firmwares.com/downloads-file/21127/H930G30a_00_OPEN_IL_OP_0903
Will it have an impact on call services and bands?
Any chance it is really a carrier using VoLTE for calls? I tried asking all kind of questions but didn't get any smart answer from the tech support team.
Also, what do you mean by registering the phone? I never heard about this.
Thanks again!
View attachment 5082915View attachment 5082917View attachment 5082919

For some reason I cannot see your attachments. What I wanted to see was (1) whether you have an LTE connection and (2) whether the phone sees VoLTE as provisioned. In truth, I only need the Phone info screen (from the Testing menu) to see that.
I think it is quite plausible that your carrier requires VoLTE to make calls and that your ROM doesn't support it because it doesn't know your carrier. A ROM for your region probably DOES know your carrier (if they are well established). But it's also possible that it doesn't (if they're newer or changed their VoLTE parameters in recent years).
This was my first thought when I read your post and saw that you were on 4G (which should be LTE, although in USA carrier marketing departments have diluted the term to also cover old 3.5G). And I see that it is ChazzMatt's thought too, with the example from Jio India.
I googled We4G to get a clue if they're VoLTE only, but all the links were in Hebrew
Carriers who don't require VoLTE drop the connection to 3G in order to make calls. This works on every phone that supports LTE because it doesn't require knowledge about your carrier.
However VoLTE relies entirely on VoIP and requires an elaborate login to carrier servers, with security and handshaking to prevent illicit use of their network. And the parameters for that are carrier specific. Each phone has a so-called "buffet" of carrier configs known to that ROM. That's why it matters to use a ROM that knows your carrier.

Thanks for the detailed reply.
I think I'll try the local ROM I mentioned. I just want to be sure it doesn't make a clean wipe if I flash Kdz with LG UP. is that so?
I'm uploading the attachments once again.

Tapatalk is messing with attachments. Here's the last one

KamaL said:
Thanks for the detailed reply.
I think I'll try the local ROM I mentioned. I just want to be sure it doesn't make a clean wipe if I flash Kdz with LG UP. is that so?
I'm uploading the attachments once again. View attachment 5082947View attachment 5082949
Click to expand...
Click to collapse
Thank you. I see your attachments now.
So you do indeed have LTE connection for your mobile data. But the phone doesn't even pick up VoLTE provisioning -- which is the first and most basic step in supporting VoLTE.
I would definitely try the regional ROM, but you should flash with Refurbish or Partition DL -- which means losing data. Sorry.
In fact, since you're doing a Frankenstein, I would flash back to Nougat first using Partition DL (to update the partition table), perform a Master Reset (it may bootloop until you do), then flash up to Pie. Wait for @ChazzMatt to confirm those steps.
Good luck to you

TheDannemand said:
Thank you. I see your attachments now.
So you do indeed have LTE connection for your mobile data. But the phone doesn't even pick up voLTE provisioning.
I would definitely try the regional ROM, but you should flash with Refurbish or Partition DL -- which means losing data.
In fact, since you're doing a Frankenstein, I would flash back to Nougat first using Partition DL (to update the partition table), perform a Master Reset, then flash up to Pie. Wait for Chazz to confirm those steps.
Good luck to you
Click to expand...
Click to collapse
I really hope I can flash it without losing data. I prefer not to back up all data.
That's what I also did in the previous rom upgrades.
Would that be possible?

KamaL said:
I really hope I can flash it without losing data. I prefer not to back up all data.
That's what I also did in the previous rom upgrades.
Would that be possible?
Click to expand...
Click to collapse
I don't see any way to do this safely without losing data. Sorry.
You could skip that carrier and go with one that doesn't require VoLTE (i.e. one which supports the old dropping to 3G for calls). But you won't have the benefits of VoLTE and WiFi Calling. And you may be in the same situation later if that carrier decides to close down their 3G network and go VoLTE only.

KamaL said:
Tapatalk is messing with attachments. Here's the last oneView attachment 5082951
Click to expand...
Click to collapse
Try enabling 'VoLTE Provisioned' on that screen then restarting your phone.
Is there an 'Advanced Calling' menu in Settings?

Two things that might help:
1) Before taking the plunge, put the SIM in your Xiaomi phone and see if you can make a call WITHOUT using VoLTE: One way is if Settings menus allow disabling VoLTE. If no Settings menus, try the same Testing info - Phone info screen and see if VoLTE is provisioned there. I assume it is. But if VoLTE is ALSO not provisioned on the Xiaomi, that means the problem isn't lack of VoLTE on the V30.
2) Just backup the phone using LG Backup, either through Settings -> General menu -> Backup (then transfer file to PC or flash drive) or using LG Bridge. It backs up all app data and most phone settings (though not all). And I was able to use it across different ROM versions and even different ROMs (between H932 and US998).

jptV30 said:
Try enabling 'VoLTE Provisioned' on that screen then restarting your phone.
Is there an 'Advanced Calling' menu in Settings?
Click to expand...
Click to collapse
I can't turn it on unfortunately.
There's a call--> additional settings - - > other settings menu
But I get this error message when I try it, and then I lose LTE connection too.

jptV30 said:
Try enabling 'VoLTE Provisioned' on that screen then restarting your phone.
Click to expand...
Click to collapse
That one is info only, not a toggle -- even though it looks like it.
KamaL said:
There's a call--> additional settings - - > other settings menu
But I get this error message when I try it, and then I lose LTE connection too. View attachment 5082979
Click to expand...
Click to collapse
Yeah, as long as the phone doesn't see it as provisioned, we can forgot about menus and settings.

TheDannemand said:
Two things that might help:
1) Before taking the plunge, put the SIM in your Xiaomi phone and see if you can make a call WITHOUT using VoLTE: One way is if Settings menus allow disabling VoLTE. If no Settings menus, try the same Testing info - Phone info screen and see if VoLTE is provisioned there. I assume it is. But if VoLTE is ALSO not provisioned on the Xiaomi, that means the problem isn't lack of VoLTE on the V30.
2) Just backup the phone using LG Backup, either through Settings -> General menu -> Backup (then transfer file to PC or flash drive) or using LG Bridge. It backs up all app data and most phone settings (though not all). And I was able to use it across different ROM versions and even different ROMs (between H932 and US998).
Click to expand...
Click to collapse
I didn't find settings to turn off VoLTE.
Here are the settings on the xiaomi. It is NOT provisioned apparently.... View attachment 5082983

KamaL said:
I didn't find settings to turn off VoLTE.
Here are the settings on the xiaomi. It is NOT provisioned apparently....
Click to expand...
Click to collapse
The screenshot doesn't include the VoLTE line. But if VoLTE is ALSO not provisioned on the Xiaomi that means the problem if elsewhere, not lack of VoLTE on the V30. So hold off on that Frankenstein for a bit.
I have a client meeting coming up, probably won't have more time today. But this is good news, kind of

eSim/BL/root

Just a real quick question before i return the phone tomorrow.
On the g981u1 (purchased from google through Fi), same as everywhere else, has the sim manager disabled, bootloader not unlockable.
From all the searching i did today, which was horrible, i just wanted to verify in a last ditch effort before sending it back.
The only way i found to enable esim is to modify the features.xml (from sounds of it). However to do so you need root, and of course it appears root requires unlocked bootloader(unless i missed something somewhere)
I have been unable to find a way to unlock bootloader(am i wrong?)
I havent found root (without unlocked bootloader)
Edit- nvm i found what i was looking for

skullzaflare said:
Just a real quick question before i return the phone tomorrow.
On the g981u1 (purchased from google through Fi), same as everywhere else, has the sim manager disabled, bootloader not unlockable.
From all the searching i did today, which was horrible, i just wanted to verify in a last ditch effort before sending it back.
The only way i found to enable esim is to modify the features.xml (from sounds of it). However to do so you need root, and of course it appears root requires unlocked bootloader(unless i missed something somewhere)
I have been unable to find a way to unlock bootloader(am i wrong?)
I havent found root (without unlocked bootloader)
Edit- nvm i found what i was looking for
Click to expand...
Click to collapse
So what is your solution?
Sent from my SM-G985F using Tapatalk

skullzaflare said:
Just a real quick question before i return the phone tomorrow.
On the g981u1 (purchased from google through Fi), same as everywhere else, has the sim manager disabled, bootloader not unlockable.
From all the searching i did today, which was horrible, i just wanted to verify in a last ditch effort before sending it back.
The only way i found to enable esim is to modify the features.xml (from sounds of it). However to do so you need root, and of course it appears root requires unlocked bootloader(unless i missed something somewhere)
I have been unable to find a way to unlock bootloader(am i wrong?)
I havent found root (without unlocked bootloader)
Edit- nvm i found what i was looking for
Click to expand...
Click to collapse
did you manage to unlock Esim. I have same issue. I need to know hot to enable esim

axelrade said:
did you manage to unlock Esim. I have same issue. I need to know hot to enable esim
Click to expand...
Click to collapse
So far, no go on the esim. I did get unlocked etc, but it seems something else is keeping the esim inactive. I almost need a snapdragon with esim working (from another country) to compare to

skullzaflare said:
So far, no go on the esim. I did get unlocked etc, but it seems something else is keeping the esim inactive. I almost need a snapdragon with esim working (from another country) to compare to
Click to expand...
Click to collapse
Snapdragon variants aren't eSIM enabled, only Exynos devices.

I remember seeing the option enabled when you flash the Exynos magisk module on a Snapdragon device. It also gave me call recorder.

ChongoDroid said:
I remember seeing the option enabled when you flash the Exynos magisk module on a Snapdragon device. It also gave me call recorder.
Click to expand...
Click to collapse
CSC change does not appear to work on snapdragon, i already tried it.
HOWEVER, editing Build.prop in vendor did enable sim manager for me, however status is showing esim imei as unknown (yes my box has 2 imei) and the add gets stuck

skullzaflare said:
CSC change does not appear to work on snapdragon, i already tried it.
HOWEVER, editing Build.prop in vendor did enable sim manager for me, however status is showing esim imei as unknown (yes my box has 2 imei) and the add gets stuck
Click to expand...
Click to collapse
Can you specify how you accessed Build.prop and also what you edited to enable sim manager?

axelrade said:
did you manage to unlock Esim. I have same issue. I need to know hot to enable esim
Click to expand...
Click to collapse
dnldcs said:
Can you specify how you accessed Build.prop and also what you edited to enable sim manager?
Click to expand...
Click to collapse
I am rooted/unlocked
In vendor\build.prop i found "persist.radio.multisim.config=ss" which is single sim. dsds would be for dual sim. Phone would not let me modify or replace the build.prop.
With the recommendation from Orphee i installed this package in my magisk
https://forum.xda-developers.com/apps/magisk/module-magiskhide-props-config-t3789228
From there it let me change that line to dsds, and thus here we are. I am unsure if dsds should be a different line for esim, or if something else is needed to "start" the esim.

Are both modules enabled ? CSC and Props config
And is there 2 IMEI written in phone About screen ? Not only the box.
View attachment 5131175

Orphee said:
Are both modules enabled ? CSC and Props config
And is there 2 IMEI written in phone About screen ? Not only the box.View attachment 5131175
Click to expand...
Click to collapse
Currently the IMEI for esim shows unknown, so it IS possible i broke that during UL/root or something, but i feel more inclined to believe it is just not enabled. On stock rom it only showed the normal IMEI
I have tried both yes

Then you must fix or find how to have the IMEI number shown in the phone menu.
Esim registration will not work until you have the IMEI number shown.

Orphee said:
Then you must fix or find how to have the IMEI number shown in the phone menu.
Esim registration will not work until you have the IMEI number shown.
Click to expand...
Click to collapse
Correct! That is where i am currently stuck lol

Download Google dialer and then enter *#*#467#*#" and there's some esim related toggles available now.
You can enable RCS here too if you know what you're doing.

ChongoDroid said:
Download Google dialer and then enter *#*#467#*#" and there's some esim related toggles available now.
You can enable RCS here too if you know what you're doing.
Click to expand...
Click to collapse
Just tried. It does not work.

insomniacandroid said:
Just tried. It does not work.
Click to expand...
Click to collapse
Dang

ChongoDroid said:
Dang
Click to expand...
Click to collapse
Do you a screenshot?
Inviato dal mio SM-G9860 utilizzando Tapatalk

Question Volte suddenly stopped working

Hello, Volte used to work well on my op9 pro recently updated to A12, I tied switching my sim card from sim 1 to sim 2 as I read some users were able to connect to 5g that way, well, it didn't work and when I switched my sim back, volte stopped working, tried restarting the phone a couple of times, no luck. Any ideas ?
Also, even before switching to A11 5g never worked and still doesn't work on my 9Pro in the UAE, tried all possible solutions and it still doesn't work, any possible solutions?

Can you try to reset your APNs and/or the whole networking? (Beware: by resetting the network you'll loose your saved WiFi configurations.)

MaUop3 said:
Can you try to reset your APNs and/or the whole networking? (Beware: by resetting the network you'll loose your saved WiFi configurations.)
Click to expand...
Click to collapse
I just tried that, didn't work unfortunately, no volte or 5g, I only get 4g+ and my sim supports 5g on other devices :/ I can live with 4g, but I need volte to work

Mardds said:
I just tried that, didn't work unfortunately, no volte or 5g, I only get 4g+ and my sim supports 5g on other devices :/ I can live with 4g, but I need volte to work
Click to expand...
Click to collapse
I was getting the same issue, but flashing a different variant of your current c.44 should do the trick.
Ex: I have a LE2127 (TMO), I converted with a11 to use LE2123(EU) software updates. When android 12 hit my phone wouldn't give me data on the 2123 update, so I had to download the LE2125(global/NA) update and flash using the the system update app that was so generously given in the following post:
Post in thread '[TMO] 9 PRO MODEM RETENTION' https://forum.xda-developers.com/t/tmo-9-pro-modem-retention.4292445/post-86328243
I don't know what software or model your phone is now, so I am NOT suggesting you switch if you are not already on 2123 or 2125. Those two are interchangeable without problem so it should be fine

Question Galaxy Z Fold3 - FirstNet - LTE - Unable to Make Calls

FYSA:
I recently ran into an issue with my AT&T/FirstNet Galaxy Z Fold3, on Android 12, not being able to make or receive calls when on 4G LTE. When the device was set to use only 3G/2G, it could make and receive calls just fine. Our FirstNet representative worked with his folks and it was assumed that I would need a warranty replacement device. I found this to be not true.
Here's some backround on my Fold3:
1. It was moved from ATT firmware to XAA eg. F926U to F926U1 via patched Odin.
2. It was running Android 12 when I noticed the issue.
3. Reverting to older Android 11 Firmware did not resolve the issue.
Here's the steps I took to resolve the issues with my Fold3:
1. Remove FirstNet SIM from the device and flash the latest U1 Firmware, which can be found at https://samfw.com/firmware/SM-F926U1
2. Let the device boot, skip all steps requiring sign-in, and things of that sort to just get the desktop.
3. Put an AT&T SIM into the device, it does not need to be active or provisioned. Give it a few seconds, the device will tell you its updating carrier settings, etc; and reboot.
4. Turn the device off, and boot it into Download mode.
5. Flash the firmware and userdata which can be found at https://androidfilehost.com/?w=files&flid=327759
6. Let the device boot, you'll see the AT&T logo appear, and the AT&T bloat apps.
7. Replace the inert AT&T SIM with the FirstNet SIM.
8. Profit.
I hope this helps someone, this appears to be an issue that's cropped up here and there on AT&T Forums and Reddit and I figured I'd write this up as it resolved the issue for me.

whirl08 said:
FYSA:
I recently ran into an issue with my AT&T/FirstNet Galaxy Z Fold3, on Android 12, not being able to make or receive calls when on 4G LTE. When the device was set to use only 3G/2G, it could make and receive calls just fine. Our FirstNet representative worked with his folks and it was assumed that I would need a warranty replacement device. I found this to be not true.
Here's some backround on my Fold3:
1. It was moved from ATT firmware to XAA eg. F926U to F926U1 via patched Odin.
2. It was running Android 12 when I noticed the issue.
3. Reverting to older Android 11 Firmware did not resolve the issue.
Here's the steps I took to resolve the issues with my Fold3:
1. Remove FirstNet SIM from the device and flash the latest U1 Firmware, which can be found at https://samfw.com/firmware/SM-F926U1
2. Let the device boot, skip all steps requiring sign-in, and things of that sort to just get the desktop.
3. Put an AT&T SIM into the device, it does not need to be active or provisioned. Give it a few seconds, the device will tell you its updating carrier settings, etc; and reboot.
4. Turn the device off, and boot it into Download mode.
5. Flash the firmware and userdata which can be found at https://androidfilehost.com/?w=files&flid=327759
6. Let the device boot, you'll see the AT&T logo appear, and the AT&T bloat apps.
7. Replace the inert AT&T SIM with the FirstNet SIM.
8. Profit.
I hope this helps someone, this appears to be an issue that's cropped up here and there on AT&T Forums and Reddit and I figured I'd write this up as it resolved the issue for me.
Click to expand...
Click to collapse
Just to confirm this did in fact downgrade your device from One UI 4, Android 12 back down to Android 11 correct? Thanks.

mbellis said:
Just to confirm this did in fact downgrade your device from One UI 4, Android 12 back down to Android 11 correct? Thanks.
Click to expand...
Click to collapse
Indeed it did. And then I updated through the OS back to 12.

I understand you flashed the U1 firmware, but what model phone do you have?
EDIT: Never mind, saw you are the person helping me Iin my thread lol