So, I've got a Galaxy S10e, with a model number G970U1, and the entire reason I bought this thing was so that I could use voice over LTE on AT&Ts network - it was one of the model numbers listed that was supported by AT&T, however, the phone itself, while being brand new, was originally a Verizon phone, as the phones CSC states that it is XAA/XAA/VZW. Upon insertion of my ATT sim card, the phone did not adapt to being an ATT CSC, even though it has the OYM software that should have the ATT CSC in it. I have tried a ton of things to try to get it to switch CSCs, from flashing an ATT CSC in Odin, to just doing resets with and without the sim card in, to literally paying $35 for Samkey to try their CSC changer, but simply doesn't work. nothing I do will get this thing to switch to the ATT CSC.
Anyways, as a consequence of not running the ATT CSC, VoLTE does not work. ATT has already provisioned the phone for VoLTE but the phone simply doesn't automatically acquire an IMS registration upon boot. I've discovered after many hours of trial and error, a way to make VoLTE work, but I can't find a way to make the fix stick between boots. This is where I'm hoping somebody else can come in and help. I'm looking to try to get the phone to stop automatically discovering IMS settings since I think it's this very auto discovery that is causing my fix not to stick.
Here is what I have to do every time the phone reboots to get volte working:
Open Alliance Shield X, go to App Manager
Search for IMS settings, click it, go to activities, and then launch the IMS settings menu with the first activity in the list.
Go to the IMS service settings, upon clicking of the IMS service settings, ALL of the toggles for RCS and MMTEL will be off and the upper left corner says "ATT US" - I toggle all of the toggles on and wait about 10 seconds
Go to settings, about, sim card status, and at this point my IMS registration status should have gone from not registered, to registered, however, VoLTE still doesn't work at this point.
Switch back to the IMS settings menu, go back a page and then click "Reset to default" to reset all IMS settings to default. Here is where things get strange - at this point, the IMS settings menu will claim I am using the T-Mobile IMS settings - but at this point my IMS registration status will remain registered, and VoLTE will work properly until I restart the phone.
I want to try to keep these settings, but like I said, once I reboot the phone, it gets the ATT IMS settings and VoLTE will refuse to work, and my IMS will not be registered.
Any advice?
PhotonDispenser said:
... Any advice?
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Click to collapse
Do you absolutely HAVE to have ATT? You would likely get better results with T-mobile.
MrGoodtunes said:
Do you absolutely HAVE to have ATT? You would likely get better results with T-mobile.
Click to expand...
Click to collapse
Not necessarily, but the issue is that I've got 6 lines on AT&T, with some of the phones not being paid for.
You might try this method. Download the Latest same firm tool. Hit this tool is basically used for removing the FRP lock on phones, and it actually does work for that, but one other feature the program has is the ability to change the CSC code on your firmware. Which it did successfully, until the phone was rebooted and then it locked back on to AT&t. So the trick I think would be that after you use the tool and before you reboot the phone do whatever you're going to do because it you can change it to xas or xaa in which case it's unlocked and you should be able to manipulate it. I have never actually done this but in theory I think it might work good luck brother keep fighting the good fight
Related
I bought an Unlocked Canadian S6 recently, and it just won't let me connect to the LTE network.
Model Numer : SM-G920W8
Android Version : 5.0.2
Baseband : G920W8VLU1AOCG
Connecting to the LTE is not even an option. When I go in the Network Options, I get the choice between :
-WDCMA/GSM (auto connect)
- WDCMA only
- GSM only
I know for a fact that I am in the coverage zone, so no need to ask that silly question
I've tried different SIM cards, played in the options a bit, and factory reset the phone about 5 times now, yet nothing seems to work.
Also, when I try to do the update, it just reboots and gives me an Android logo and a failed Icon
I've only seen one other post like this from a carrier's support website, but no solutions were found.
**Update : For a reason, after a recovery, it will connect to the LTE for a bit or until next boot, then go back to what it is now.
First question, who did you buy the phone from? Second, Is it second hand? By default, Wind mobile does not allow the LTE option to be displayed in system settings as they as a carrier don't have LTE. It is blocked by the CSC setting for the carrier. As for other carriers It should leave you the option to connect in settings where you say it is not. If it is a Wind phone, You would need to change the CSC to enable the LTE selection. There is a method to force LTE even without option in settings, but I think it is removed in the latest firmware. Try dialing *#2263# in the dialer. It may bring you to menu that will allow you to select LTE. This is not a permanent method though as it will need to be done every boot. The other way, (If you are in fact a Wind/Mobilicity phone) is to enter dialer and enter *#272*IMEI# with IMEI being your devices unique code. If at all possible, take a full nand and Titanium Backup before doing this and be sure to transfer everything off the phone to a PC. This method wipes everything and I mean everything off the phone buy is a surefire way to enable LTE.
Yes, it was second hand. I didn't ask who was his carrier simply because it was unlocked.
I'll try it tomorrow, thanks for the information
Here is the menu you will see when you type the *#272*imei# code into your dialer. The codes are the carrier names. Mine which is GLW is Wind, BMC is Bell, RWC is Rogers, etc.
Maybe there is no LTE in your area...
roydok said:
Maybe there is no LTE in your area...
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Click to collapse
It would still be visible in the Settings/Mobile Networks/Network Mode menu which it is not. His problem is more than that.
BCSC said:
First question, who did you buy the phone from? Second, Is it second hand? By default, Wind mobile does not allow the LTE option to be displayed in system settings as they as a carrier don't have LTE. It is blocked by the CSC setting for the carrier. As for other carriers It should leave you the option to connect in settings where you say it is not. If it is a Wind phone, You would need to change the CSC to enable the LTE selection. There is a method to force LTE even without option in settings, but I think it is removed in the latest firmware. Try dialing *#2263# in the dialer. It may bring you to menu that will allow you to select LTE. This is not a permanent method though as it will need to be done every boot. The other way, (If you are in fact a Wind/Mobilicity phone) is to enter dialer and enter *#272*IMEI# with IMEI being your devices unique code. If at all possible, take a full nand and Titanium Backup before doing this and be sure to transfer everything off the phone to a PC. This method wipes everything and I mean everything off the phone buy is a surefire way to enable LTE.
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Click to collapse
Sweet! It works :good: Thanks man
Now, would you have any ideas on why the update won't work? I didn't get much into it yet, but I will soon.
I'm not sure why it wouldn't update, but now that you have changed the CSC you can download the update and flash with Odin. Pick your carrier and go to town. The guy running the following thread runs his own firmware host. He's got amazing DL speeds. Usually takes me 6 or so minutes to do the 1.6gb file. http://forum.xda-developers.com/showthread.php?t=3086387
I'm having the same issue.
Scurbs said:
Sweet! It works :good: Thanks man
Now, would you have any ideas on why the update won't work? I didn't get much into it yet, but I will soon.
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Click to collapse
Connected with someone selling a G920W8 version. LTE is disabled and the codes aren't working. Can you reaffirm which unlock code worked for you? I'm on Fido, what LTE network are you using?
hi BCSC
Thanks for the details. I searched complete net and read all articles but nothing set me up with the proper thing. i read your solution i dialled *#2263# and all i got is service mode and in that i went to band selection , LTE and the all ....... Yes and its showing LTE in mobile data. THanks so much.
But now another issue, network is showing perfect but no outgoing and incoming calls.
in incoming its showing busy and on outgoing its not connecting to another phone.
And, Lte is not showing in mobile networks, There only 3 options still are showing.
Mine is same Wind S6 but i had to use in India.
Let Me know
Thanks once again
Cheeerzzzzz
Varun
Picking LTE from the service mode will note make it visible from the settings menu. Its more of a workarpund instead of a way of permanently enabling it. As for the issue of no out/in calls, my best guess is that it could be due to which LTE bands are being used or are available in India. Unfortunatly I have no way to test that option. I only was successful in getting the Wind LTE option on Canadian carriers.
Sent from my SM-G935W8 using XDA-Developers mobile app
My apologies if this is covered someplace; a search of the T-Mo S7 forums turned up nothing.
I am traveling internationally and that means the phone is always "roaming." I'm on T-Mobile's unlimited international plan and so the roaming is included. Nevertheless I get constant warnings about data roaming, by way of a popup. The popup offers a choice to go to roaming settings. If you turn roaming off, of course, nothing works, and then you still get a constant popup asking if you want to turn roaming back on.
I am not alone; the hue and cry has been raised about this over on T-Mobile's forums, here:
https://support.t-mobile.com/thread/141619
T-Mobile's response is that this is a Samsung issue and to take it up with them.
My phone is rooted stock and I have SQLite editor. Surely there must be someplace I can access the settings for this to turn these popups off altogether, but I have not found it. Or perhaps a service menu accessed by dialer code?
Any hints greatly appreciated.
Config details:
model SM-G930T
Android version 7.0
Security patch level January 2018
Build Number NRD90M.G930TUVS4BRA1
SE enforcing, SEPF_SECMOBILE_7.0_0004
slwelsh said:
My apologies if this is covered someplace; a search of the T-Mo S7 forums turned up nothing.
I am traveling internationally and that means the phone is always "roaming." I'm on T-Mobile's unlimited international plan and so the roaming is included. Nevertheless I get constant warnings about data roaming, by way of a popup. The popup offers a choice to go to roaming settings. If you turn roaming off, of course, nothing works, and then you still get a constant popup asking if you want to turn roaming back on.
I am not alone; the hue and cry has been raised about this over on T-Mobile's forums, here:
https://support.t-mobile.com/thread/141619
T-Mobile's response is that this is a Samsung issue and to take it up with them.
My phone is rooted stock and I have SQLite editor. Surely there must be someplace I can access the settings for this to turn these popups off altogether, but I have not found it. Or perhaps a service menu accessed by dialer code?
Any hints greatly appreciated.
Config details:
model SM-G930T
Android version 7.0
Security patch level January 2018
Build Number NRD90M.G930TUVS4BRA1
SE enforcing, SEPF_SECMOBILE_7.0_0004
Click to expand...
Click to collapse
My wife just called me from the UK with the exact same problem. She's using a brand new T-mobile S9+ running the latest update to oreo.
Reading the T-mobile thread I did see a couple of suggestions that had limited results. One was to disable the Samsung+ app or turn off all the apps inside of Samsung+. The other was to disable automatic network selection and to put it into manual mode. Problem with the second option is you have to reselect a different network if you are moving around...like most people do.
I'm going to call her tomorrow and see if any of these work. I'll report back.
Nothing worked. Fortunately, she brought her old iPhone along and started using it again. Sorry
Forgive me if this has been covered but I havn't found the answer. I've flashed just about every phone I've ever had but my question here is can I / how do I flash to where the phone reads as XAA in download Mode?
The situation is my phone was originally on at&t. They unlocked it and I'm on Verizon. It all works great (it still says at&t on download Mode screen)
My problem is that if I log into the my Verizon app it disables my visual voicemail. I finally got a Verizon tech on the phone that explained that it is unsupported due to originally being on a different carrier and their system identifies that and disables the VVM. The only fix I can find is to put my sim in my backup S9+ that came from Samsung unlocked (or any Verizon phone) and I can then reactivate my VVM by resubscribing.
I currently have 3 Note 20 Ultras. One Each originally from Samsung, ATT and Verizon but the AT&T is the only one that is 512GB or I would just switch phones. I have flashed them all to U1 firmware but notice they all still reflect the original carrier in Download Mode so again my question is can I change this by flashing it / or is it just a matter of what sim card is in it when it's flashed? I need it to be seen as XAA by Verizon system so not to loose VVM... Pics attached.
Any advice here is greatly appreciated in advance.
Just a try... You can try the *#272*imei# method... But thats If it works. Not sure if the sims has to be in the phone for that to work.
GDHAMTON7 said:
Just a try... You can try the *#272*imei# method... But thats If it works. Not sure if the sims has to be in the phone for that to work.
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Click to collapse
Yes it brings up this menu... So I just select the XAA and that's it? I've been reading forums and this method is reversible it seems ... I'm familiar with Odin and all that but these hidden menus are new to me...
Thanks for the reply btw
You may have to activate the bottom most option to stay.
Don't worry if you can't access the menu after the change. You can download samsung band selection and change to automatic or one of the lte options then back to automatic to get to the menu.
CSC Guide
CSC (which I think means Carrier Service Code) helps to set what options for settings show in the device for things like voicemail and wifi calling, as well as sets network code information for things like carrier aggregation combos.
When you go to your phone settings->about phone->software information and look in the Service Provider SW ver. section, you will see as the last line a combo like XXX/YYY/ZZZ. This indicates what carrier sales and network code is set and what brand the phone was manufactured as.
I think of the XXX/YYY/ZZZ configuration as follows
XXX=Sales Code-What kind of features are setup in the firmware like wifi calling, video calling and settings menus
YYY=Network Code-What kind of network features are set for things like carrier aggregation and LTE/5G bands
ZZZ=Manufactured as Code- What model the phone was originally manufactured as. Ot has no affect on the system settings or options. THIS CAN NOT CHANGE. IT SHOULD ALWAYS BE THE SAME. ONLY A ROOTED PHONE WOULD BE ABLE TO ACCESS THE FILES NECESSARY TO CHANGE THIS.
for more details, refer to post:-
[Guide] Service Mode and CSC Guide/Enable LTE/5G Bands and Services/5G Low Band on U1
Hello All, Many people have asked about service mode and CSC related questions and I thought we should get a discussion going that is all in one place. *DISCLAIMER* I do not take any responsibility for any issues that may occur from changing...
forum.xda-developers.com
I do not have very good reception where I am, so I started looking for things to help. Got a booster which wasn't much help. I then thought voice over wifi, so I checked if the s8 had it and yes it does, or so I thought. Voice over WiFi did not appear anywhere in my settings, my Telus provider was baffled as I was. We have been on the phone for hours. I with guidance backed up and factory reset my s8. This brought in an app under settings>Apps>more>show system apps and then scroll till I came to WiFi Calling. This appeared with the reset. Apparently something like that should appear in the phone app settings and have a switch, Mine does not. Then I discovered there were codes and service mode. Under code *#9090# I found a setting that reads "VoLTE Weakcell Setting.
My question is please if anyone knows how to implement WiFi Calling on s8 I would be grateful. God bless.
kenmartel said:
I do not have very good reception where I am, so I started looking for things to help. Got a booster which wasn't much help. I then thought voice over wifi, so I checked if the s8 had it and yes it does, or so I thought. Voice over WiFi did not appear anywhere in my settings, my Telus provider was baffled as I was. We have been on the phone for hours. I with guidance backed up and factory reset my s8. This brought in an app under settings>Apps>more>show system apps and then scroll till I came to WiFi Calling. This appeared with the reset. Apparently something like that should appear in the phone app settings and have a switch, Mine does not. Then I discovered there were codes and service mode. Under code *#9090# I found a setting that reads "VoLTE Weakcell Setting.
My question is please if anyone knows how to implement WiFi Calling on s8 I would be grateful. God bless.
Click to expand...
Click to collapse
Typically, VoLTE functionality is controlled by your carrier in their system.
This is how it normally works:
1) your device must support/offer VoLTE service
2) your carrier must support VoLTE
3) your carrier must support VoLTE on your specific model number
4) your carrier enables VoLTE service to your device in their system somehow or they send you a specific SIM to enable VoLTE.
In other words, VoLTE support and functionality is more controlled on their end than it is on your end.
Yes I understand, when their tech support says s8 should do wifi calling, and the settings dont appear where they should, and then after a reset an app called "wifi calling" appears in the app list, but nothing anywhere else. Except, as I was able to find, there is a service mode and there is a selection there that is called "Weak Cell Settings". Sadly I dont have service programming manual. Thank you.
kenmartel said:
Yes I understand, when their tech support says s8 should do wifi calling, and the settings dont appear where they should, and then after a reset an app called "wifi calling" appears in the app list, but nothing anywhere else. Except, as I was able to find, there is a service mode and there is a selection there that is called "Weak Cell Settings". Sadly I dont have service programming manual. Thank you.
Click to expand...
Click to collapse
It could be that the network supports S8 but doesn't support your specific model number of S8, especially if the S8 that you are using is not the same model number as the specific model of S8 that they offered/sold on their network, if it's from another network and has been unlocked to be used on other networks, it may not be a specific model number that is specifically supported by their network. If this is the case, the specific model number(s) of S8 that they support would have a firmware that has the settings in the correct place but the firmware on your specific model number might not have it. Not all model numbers are equal, the firmware on each of them is designed and built by the specific network that it is branded to, with each if them having differences intentionally chosen by the network that is branded to, including what settings it has or doesn't.
Hi Everyone
Thank you for your help. Problem is solved. It is a service setting that sets the retail company selling you the phone and /or the plan. In my case I had a phone which my provider did not program when I began a new plan with them. all companies are listed and I guess the program for wireless calling is included with your selection of the company....phone responded immediately with all the proper programming. Thanks again for your time and effort
kenmartel said:
Hi Everyone
Thank you for your help. Problem is solved. It is a service setting that sets the retail company selling you the phone and /or the plan. In my case I had a phone which my provider did not program when I began a new plan with them. all companies are listed and I guess the program for wireless calling is included with your selection of the company....phone responded immediately with all the proper programming. Thanks again for your time and effort
Click to expand...
Click to collapse
I've never known a device to have that setting. If your device is an international model, it would make sense to have that setting for the various regions/carriers.
My carrier-branded, SIM-unlocked phone, when starting up normally, will - at first - not make or receive voice calls with the APN settings for the MVNO SIM card I have (mobile data works right away). I need to manually switch to the APN settings that came preinstalled with the phone (and which contain no settings except for the APN address of the carrier that I bought the phone from), then switch back to the correct APN. Then voice calls work. If I boot up in safe mode, this dance isn't necessary. Which would suggest that there might be some app or setting on the phone that interferes somehow with the proper functioning of the voice call function.
Not sure if this is related but I also note that the VoLTE setting is always greyed out (although it's set to "On") and I never see the VoLTE icon in my status bar though with the same SIM card, I see it every time I make calls on my other phone from the same manufacturer (Samsung).
I have posted the specifics of my phone in a previous post in the subforum for that model, see below. Any suggestions on how to trouble-shoot this?
docomo A53 voice network connection problem #APN
Weird issue... Brand-new A53, docomo-branded (I live in Japan), SIM-unlocked, fully updated (last update: Oct 1). Haven't messed around with it, no root, no nothing. USIM is from IIJmio, one of the discount MVNOs here, carrier is docomo. USIM...
forum.xda-developers.com
Start uninstalling the 3rd party apps, one by one.
Reviewing their permissions may yield clues.
blackhawk said:
Start uninstalling the 3rd party apps, one by one.
Reviewing their permissions may yield clues.
Click to expand...
Click to collapse
Yeah, guess I'll have to do that. Such a hassle. Any suggestions on what sort of app to focus on first?
axel007 said:
Yeah, guess I'll have to do that. Such a hassle. Any suggestions on what sort of app to focus on first?
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Click to collapse
Like I said in my first post. The app also likely runs at startup. Be glad it didn't permanently alter a hidden setting...
> Like I said in my first post.
Thanks, I must have missed your first post then. Makes sense.