Sprint S21 on Verizon - Splash Screen & Wifi Calling - Samsung Galaxy S21 Questions

I have an S21 that I purchased from Sprint. When using on Sprint the startup splash screen was yellow with the Sprint logo and when I switched to a T-Mobile sim card the splash screen was updated to magenta with the T-Mobile logo. Now that I've moved to Verizon the splash screen hasn't changed. Any way to update it? Also, since moving to Verizon I have lost the setting for wifi calling to be enabled. Is there a way to get that back?

Okay, so some extra searching told me that apparently my CSC wasn't updated from TMB to VZW when I switched my sim card. Unsure whose fault that is, but is there a way to update it without paying for SamKey? Is there any actual benefit to updating from TMB to VZW, or am I wasting my time?

Mustang46L said:
Okay, so some extra searching told me that apparently my CSC wasn't updated from TMB to VZW when I switched my sim card. Unsure whose fault that is, but is there a way to update it without paying for SamKey? Is there any actual benefit to updating from TMB to VZW, or am I wasting my time?
Click to expand...
Click to collapse
Hi
Regarding changing CSC without paying , maybe if you are lucky you could try the dialer method , check here also read this thread , if this do not work SamKey may be your last option( without rooting)
Regarding the benefits of changing CSC.... in your case i do not know

MAX 404 said:
Hi
Regarding changing CSC without paying , maybe if you are lucky you could try the dialer method , check here also read this thread , if this do not work SamKey may be your last option( without rooting)
Regarding the benefits of changing CSC.... in your case i do not know
Click to expand...
Click to collapse
Thanks, I did try the dialer option already, no dice.

Just thought I'd update this to let everyone know that I go the update to Android 12 today, and when the update finished my phone realized it had a Verizon sim card and the CSC was finally updated!
It's a small win, but I'll take it.

Related

[Q] After Updating latest samsung update My phone is now 100% roaming ?

I have not moved or changed locations or anything but after updating the newest samsung firmware (on friday) my phone is now 100% of the time roaming. I've checked the network settings and it says Tmobile in there as it should (i'm on Tmobile in america with the i9300).
Is there something i did wrong? I updated it with Kies, what can i do to downgrade back to the old firmware if i get tired of this roaming business?
try changing your modem
Sent from my GT-I9300 using xda premium
Electricview said:
I have not moved or changed locations or anything but after updating the newest samsung firmware (on friday) my phone is now 100% of the time roaming. I've checked the network settings and it says Tmobile in there as it should (i'm on Tmobile in america with the i9300).
Is there something i did wrong? I updated it with Kies, what can i do to downgrade back to the old firmware if i get tired of this roaming business?
Click to expand...
Click to collapse
How did you be able to update your i9300 cause i am using i9300 and t-mobile as well. But no update for me at all.
I am located in NY btw so do you think I have to wait or not gonna get the update at all
Edit, Just updated mine via odin and working good
Red Wolf said:
How did you be able to update your i9300 cause i am using i9300 and t-mobile as well. But no update for me at all.
I am located in NY btw so do you think I have to wait or not gonna get the update at all
Edit, Just updated mine via odin and working good
Click to expand...
Click to collapse
I am not sure, but its funny my friend has the BLUE i9300 bought 3 weeks after mine, and he was not getting a notification of the update via kies either, but it did give it to me and my phone the exact day it was out (uk firmware).
about changing the modem, will I need to root for that? i prefer to run stock for now..
that's bizarre but it probably has something to do with the phone being an internation model with a uk csc, but i've used my S1 from the uk several times in the u.s. with t-mobile and never had that problem .....can only assume it is a bug
tmzbeme said:
that's bizarre but it probably has something to do with the phone being an internation model with a uk csc, but i've used my S1 from the uk several times in the u.s. with t-mobile and never had that problem .....can only assume it is a bug
Click to expand...
Click to collapse
Yea becuase when the phone arrived it worked great (even had a minor firmware upgrade the day i opened which was like june 15th ish or a few days later) and still worked great, no Roaming at all, then with last weeks update now it roams
It's worth pointing out that changing the modem will not work as a valid solution in this case. If one uses a non-LFB modem with the LFB ROM, the mic doesn't get used. One would have to also go to an older rom in addition to a different modem.
I'm having the same exact issue.
Need a solution.
Tried a factory reset. No dice.
Hi guys,
Didn`t find answer for my questions, so decided to link myself to similar topic.
Since the SW update I have done today my phone doesn`t lock to a network
When I go to settings to find a carrier manually, It takes about 2 minutes to find 4-5 networks available around, I am picking o2 UK (as I have a contract with them) and it says : Registering to o2 UK which takes about 4 minutes. After this it says : Emergency calls only and there is no status bars at all.
Master reset didn`t help.
What steps should I take ?
For you reference :
- Phone took from CPW in UK as sim free
- SIM Card used is from o2 UK (contract)
- I don`t want to flash anything, I would like to stay to stock ROM (if possible)
UPDATE : Chosen `Select Automaticly` allowed the phone to find signal, could make a call etc, but after 30 minutes lost signal again....
Kris
on AT&T / same firmware, no roaming issues.
Any fixes for this issue?
Hey guys,
any solution?
my phone is suffering from the same problem!
phone got from India,
however when i contacted T-mobile they said am not on roaming!
achalasawa said:
Hey guys,
any solution?
my phone is suffering from the same problem!
phone got from India,
however when i contacted T-mobile they said am not on roaming!
Click to expand...
Click to collapse
U Using it in india? Which network u using?
Any updates?
I did find out that the CSC that was applied by default was KOR. I went in and changed this to BTU using *#272*imei#, but still did not solve the issue.
Wondering if a repartition would help?
chri55tof said:
Hi guys,
Didn`t find answer for my questions, so decided to link myself to similar topic.
Since the SW update I have done today my phone doesn`t lock to a network
When I go to settings to find a carrier manually, It takes about 2 minutes to find 4-5 networks available around, I am picking o2 UK (as I have a contract with them) and it says : Registering to o2 UK which takes about 4 minutes. After this it says : Emergency calls only and there is no status bars at all.
Master reset didn`t help.
What steps should I take ?
For you reference :
- Phone took from CPW in UK as sim free
- SIM Card used is from o2 UK (contract)
- I don`t want to flash anything, I would like to stay to stock ROM (if possible)
UPDATE : Chosen `Select Automaticly` allowed the phone to find signal, could make a call etc, but after 30 minutes lost signal again....
Kris
Click to expand...
Click to collapse
If u do not wish to root then your only option is to take it back to the store, so they can fix, u bought the best smart phone available on the market and u can't make phone calls or browse internet(without wifi).
To my understanding, still no resolution on this..
My friends phone after being updated (he just got his first update after having the phone a month) is now roaming as well.. So this is definately something either with our network (t-mobile) or the recent updates.
I've just started living with it, but it sucks becuase it does silly things like makes me click 'download image' when someone sends me a picture message in text...
with the few bugs could be ironed out of this phone kinda frustrating.
I do have similar problems since I installed an update 2 weeks ago. at home the phone says it is roaming at work approx 6 miles away and with a different station I am connecting to it is fine.
t-mobile USA
Marshal said:
I do have similar problems since I installed an update 2 weeks ago. at home the phone says it is roaming at work approx 6 miles away and with a different station I am connecting to it is fine.
t-mobile USA
Click to expand...
Click to collapse
Thats interesting, no matter where I go i get roaming. Though a few times I have gotten the 'roaming' warning popped up, so maybe i went out of roaming and didnt know it? I'll keep a closer eye on it.
It is very frustrating and annoying. I've called T-Mobile and they said they would open a case with Samsung. If you guys could call too, we might get a fix.
I really suspect it is something in the CSC. Maybe if we could get the T Mobile SIII CSC and apply it?
Sent from my GT-I9300 using xda app-developers app
javacody said:
It is very frustrating and annoying. I've called T-Mobile and they said they would open a case with Samsung. If you guys could call too, we might get a fix.
I really suspect it is something in the CSC. Maybe if we could get the T Mobile SIII CSC and apply it?
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
My suspicion is wrong. I pulled the TMB CSC from a T999 ROM and manually copied it to /system/csc/TMB, then used the CSC Selector App to change to TMB.
No dice. Still in Roaming.

[Q] use of a foreign sim

Ok so I (foolishly) bought a galaxy s4 with verizon even though I was moving overseas to Israel in two months. I made sure that the phone was world capable (like it can do cdma and gsm) and the guy at the store said it would handle foreign sims no problem. Once I arrived here I got a new sim. I figured out that it needed to be in gsm. From then on it had the service bar and confirmed it was connected to Orange. Since then I have been able to receive calls and texts, but not make them, every time I try to make a call before one ring I get a prerecorded message saying that my number cant be completed as dialed. I have tried several things already to fix this: to a cell phone repair person, to the local sim carrier where a lady tried using the sim of her own phone, customer service at verizon and samsung (who both told me to go see the other). I also did a factory reset which didnt do anything.
my phone is not rooted and is schi545 ME7. I will root if I have to, but if I dont I would prefer not to for the time being
Anyway I suspect the problem has something to do with the fact that I got the phone from verizon. Every time I start the phone I get the Verizon logo and after a minute I get a notification from the verizon set up wizard saying that I have a non verizon sim and that the sims source is unknown. I also tried disabling the verizon security and was able to make the notification go away but the problem persists.
Can someone with experience with this kind of stuff help me please? Thank you so very much:good:
Are you sim unlocked? I don't think the phone is unlocked. Talk to verizon to see if they'll unlock it.
According to verizon I am. I spoke with multiple representives from verizon and they said the phone was unlocked
medphratalon said:
According to verizon I am. I spoke with multiple representives from verizon and they said the phone was unlocked
Click to expand...
Click to collapse
Has any one told you if you have to change any apn, access point name? That may be the problem too. They can be specific to the carrier.
No, how do you configure that
medphratalon said:
No, how do you configure that
Click to expand...
Click to collapse
In system settings, network & wireless, more, mobile networks, access point name. It'll be specific to the carrier so i can't help you there.
all LTE Verizon phones after Galaxy Note 2 are factory unlocked it must be a APN issue. Try maybe to do a factory reset and as previous poster suggested do the steps he told you to change the APN or look into I think it's called HiApn in Play Store.
Also try to put it in global mode or GSM? play with the settings.
still having problems
Thanks for all the input everyone but my problem still persists
I downloaded HiApn and followed its instructions to which told me to set up 3 Apns. I noticed that only one of them can be active at the time. I tried with each one active and I still can not make phone calls. Does anyone have any other ideas?
medphratalon said:
Ok so I (foolishly) bought a galaxy s4 with verizon even though I was moving overseas to Israel in two months. I made sure that the phone was world capable (like it can do cdma and gsm) and the guy at the store said it would handle foreign sims no problem. Once I arrived here I got a new sim. I figured out that it needed to be in gsm. From then on it had the service bar and confirmed it was connected to Orange. Since then I have been able to receive calls and texts, but not make them, every time I try to make a call before one ring I get a prerecorded message saying that my number cant be completed as dialed. I have tried several things already to fix this: to a cell phone repair person, to the local sim carrier where a lady tried using the sim of her own phone, customer service at verizon and samsung (who both told me to go see the other). I also did a factory reset which didnt do anything.
my phone is not rooted and is schi545 ME7. I will root if I have to, but if I dont I would prefer not to for the time being
Anyway I suspect the problem has something to do with the fact that I got the phone from verizon. Every time I start the phone I get the Verizon logo and after a minute I get a notification from the verizon set up wizard saying that I have a non verizon sim and that the sims source is unknown. I also tried disabling the verizon security and was able to make the notification go away but the problem persists.
Can someone with experience with this kind of stuff help me please? Thank you so very much:good:
Click to expand...
Click to collapse
Go to Setting, call setting, disable the prefix international. I have done the same for using Verizon S4 in Indonesia.
Mine was not unlocked either, although I knew this before buying. This is a guide I tried (without success) to unlock it on my own.
Like the last poster, I reside in Indonesia, but I was never with Verizon. I rooted mine and have had no problems since.
Ok so I went to call settings and the closest I found was assisted dialing for international calls and the option to turn it on or off. I played with that for a bit and it didnt work.
I also tried the code and it said connection problem or invalid code
during my fiddling I came upon an app that showed promise of fixing my problem if I had adb shell. Does anyone have a good place to get that? I tried a few that didnt work out for me. There was another that showed promise but it wouldnt send a package no matter what I try
Thanks
If you want ADB, you need to download Android SDK and have Java Runtime Environment also installed. Then, it is just a matter of typing in "adb" into the command prompt of Windows.
Is there a serious conflict for you not rooting the device? The true benefit of doing this is to get SIM cards from anywhere to work, and to allow certain apps to work. Rooting is simply a matter of bypassing security parameters. As long as you follow instructions strictly, you won't have an issue using the phone as it should be used.
yea I suppose I could try to root it. Im just not great at that stuff and am worried about messing up my phone permanately
medphratalon said:
yea I suppose I could try to root it. Im just not great at that stuff and am worried about messing up my phone permanately
Click to expand...
Click to collapse
You don't need to root. You need to sim unlock. Get a hold of att international chat and adj them for an unlock code.
Hey guys thanks for all the help but I figured out that it was just a bad sim all along and that the first school screwed me over
But everything works now

Possible GSM use on XT1526? Flashed TextNow Moto E with USC ROM - no success..

To be clear, I have absolutely no idea what I'm doing, and no experience whatsoever with any of this.
Over 12 hours of research I managed to unlock the bootloader, root, and flash my TextNow Moto E with a stock US Cellular ROM. Everything worked fine.
What are the next steps to take, if any? Is it possible to even use a GSM network on this phone? I have an active T-Mobile sim card that the phone simply will not accept. I get a "no sim found" notification.
I attempted this with no success.
To start, su command would not work.
This worked for me on the XT1529, but it might work on the XT1526 as well since they're both LTE/CDMA devices:
root, open /system/build.prop, add the following line to the end: ro.telephony.default_network=10
save, make sure the permissions are still 0644, reboot.
When you check *#*#4636#*#* it should be in LTE/GSM/CDMA mode, and in Settings > Mobile Network it should say "Global".
xtermmin said:
This worked for me on the XT1529, but it might work on the XT1526 as well since they're both LTE/CDMA devices:
root, open /system/build.prop, add the following line to the end: ro.telephony.default_network=10
save, make sure the permissions are still 0644, reboot.
When you check *#*#4636#*#* it should be in LTE/GSM/CDMA mode, and in Settings > Mobile Network it should say "Global".
Click to expand...
Click to collapse
This didn't work. I ended up experimenting more and softbricked my phone, got stuck in a boot loop. Through curiosity I ended up flashing the phone with a stock xt1527 rom. SIM now recognized as a non supported sim, so that's nice. Still doesn't work.
I cannot post links to screens as a new user, but if you happen to want to see them, message me and I'll link them from my dropbox.
I ended up ordering an unlocked xt1527 last night. However, I would still like to figure this out. Would I perhaps have to flash the modem?
akaholik said:
This didn't work. I ended up experimenting more and softbricked my phone, got stuck in a boot loop. Through curiosity I ended up flashing the phone with a stock xt1527 rom. SIM now recognized as a non supported sim, so that's nice. Still doesn't work.
I cannot post links to screens as a new user, but if you happen to want to see them, message me and I'll link them from my dropbox.
I ended up ordering an unlocked xt1527 last night. However, I would still like to figure this out. Would I perhaps have to flash the modem?
Click to expand...
Click to collapse
You could try the procedure posted in this thread if you haven't already, assuming your still on the xt1527 rom:
http://forum.xda-developers.com/moto-e-2015/general/how-to-verizon-moto-e-2015-gsm-network-t3098953
hydroman202 said:
You could try the procedure posted in this thread if you haven't already, assuming your still on the xt1527 rom:
http://forum.xda-developers.com/moto-e-2015/general/how-to-verizon-moto-e-2015-gsm-network-t3098953
Click to expand...
Click to collapse
Just tested this - not working. This is a really maddening scenario
I contacted sprint and gave them the IMEI - they tell me that this phone can indeed be unlocked (xt1526), but I would have to do it through TextNow. I've searched for ways to bring up the SIM unlock prompt, but it simply doesn't show up with any of the methods found. :s
akaholik said:
I contacted sprint and gave them the IMEI - they tell me that this phone can indeed be unlocked (xt1526), but I would have to do it through TextNow. I've searched for ways to bring up the SIM unlock prompt, but it simply doesn't show up with any of the methods found. :s
Click to expand...
Click to collapse
I am also having problems finding this menu. I wish there was an easy way to access it, but unfortunately, sprint has made it rather difficult.
hydroman202 said:
I am also having problems finding this menu. I wish there was an easy way to access it, but unfortunately, sprint has made it rather difficult.
Click to expand...
Click to collapse
I still have my sprint model as well, and have the MSL code. But I have also never found a way to enter it for unlock. I've tried using active ATT and VZW SIMs, and also tried flashing the USC modem on it - still works on sprint / ringplus, but also still won't acknowledge ATT or VZW SIMs.
Sent from my XT1526 using Tapatalk
dandrumheller said:
I still have my sprint model as well, and have the MSL code. But I have also never found a way to enter it for unlock. I've tried using active ATT and VZW SIMs, and also tried flashing the USC modem on it - still works on sprint / ringplus, but also still won't acknowledge ATT or VZW SIMs.
Sent from my XT1526 using Tapatalk
Click to expand...
Click to collapse
I don't know for sure, but i did read in another place on here somewhere about an "embedded card" that sprint put in another phone. I wonder if that is the case with this one? If not, all i can really think of is that there is something in place that motorola made specifically for the sprint model. We know its not modem related, so it must be somewhere else, in the NAM, or something like that. One thing i did accomplish was to get another bar, (it had no signal and looked like an outline, but it was there), show up by editing the build prop with a specific line and then rebooting. Odd thing is, its the same thing that showed up when i attemped to flash another stock firmware. The firmware i flashed was for the xt1526, retail us. Which leads me to think it might be a band issue, as someone else mentioned in another thread on here somewhere. I mean, it would make sense with the no signal and everything. Sorry for the long post, just thinking out loud i guess.
hydroman202 said:
I don't know for sure, but i did read in another place on here somewhere about an "embedded card" that sprint put in another phone. I wonder if that is the case with this one? If not, all i can really think of is that there is something in place that motorola made specifically for the sprint model. We know its not modem related, so it must be somewhere else, in the NAM, or something like that. One thing i did accomplish was to get another bar, (it had no signal and looked like an outline, but it was there), show up by editing the build prop with a specific line and then rebooting. Odd thing is, its the same thing that showed up when i attemped to flash another stock firmware. The firmware i flashed was for the xt1526, retail us. Which leads me to think it might be a band issue, as someone else mentioned in another thread on here somewhere. I mean, it would make sense with the no signal and everything. Sorry for the long post, just thinking out loud i guess.
Click to expand...
Click to collapse
Yes, I'm hoping there is a fix somehow. I'm ok to use the phone on WiFi, but it is otherwise useless to me. I'd like to have a backup phone in case my first Moto E dies, they are really rugged. I have experimented all day without success. Experimenting with build.prop does nothing. I export the build.prop text and post it just for reference, if anyone cares to play with it.
hydroman202 said:
I don't know for sure, but i did read in another place on here somewhere about an "embedded card" that sprint put in another phone. I wonder if that is the case with this one? If not, all i can really think of is that there is something in place that motorola made specifically for the sprint model. We know its not modem related, so it must be somewhere else, in the NAM, or something like that. One thing i did accomplish was to get another bar, (it had no signal and looked like an outline, but it was there), show up by editing the build prop with a specific line and then rebooting. Odd thing is, its the same thing that showed up when i attemped to flash another stock firmware. The firmware i flashed was for the xt1526, retail us. Which leads me to think it might be a band issue, as someone else mentioned in another thread on here somewhere. I mean, it would make sense with the no signal and everything. Sorry for the long post, just thinking out loud i guess.
Click to expand...
Click to collapse
its not an embedded card in the textnow wireless version as ive taken the sim card out of mine. The S3 was an imbedded card, but not this device. Im also searching for a method to sim unlock this little bugger. Ill let you know what i find out
youdoofus said:
its not an embedded card in the textnow wireless version as ive taken the sim card out of mine. The S3 was an imbedded card, but not this device. Im also searching for a method to sim unlock this little bugger. Ill let you know what i find out
Click to expand...
Click to collapse
I talked to Sprint - they told me TextNow has to SIM unlock the device. I talked to TextNow - They told me the device IS SIM unlocked. So, there's that if anybody is wondering. I've almost abandoned this experiment, but it's still in the back of my mind. In other news - the new Moto E 2015 I received has a yellowed display. 2/3 brand new Motorola devices I received had display issues. Excellent phones, poor quality control it seems.
akaholik said:
I talked to Sprint - they told me TextNow has to SIM unlock the device. I talked to TextNow - They told me the device IS SIM unlocked. So, there's that if anybody is wondering. I've almost abandoned this experiment, but it's still in the back of my mind. In other news - the new Moto E 2015 I received has a yellowed display. 2/3 brand new Motorola devices I received had display issues. Excellent phones, poor quality control it seems.
Click to expand...
Click to collapse
i got my E2015 from textnow for $10 as a refurb and its solid as a rock so far. I stumbled upon this thread and it looks promising, but im at work and we use citrix clients and not actual computers so i cant run it here, but ill give it a whirl when i get home. I do also believe that its GSM unlocked
Trying to make my XT1526 (Boost stock ROM) work with GSM, and got stuck on something weird. Inserted a SIM card from China Mobile, changed the network mode to "Global" and turned on roaming, after a while it got successfully registered on T-Mobile network, both voice and data. Yet, when I inserted a T-Mobile SIM card, the phone gave an "Invalid SIM card" error, and simply refused to connect. Thought it might be an issue with APN setting, but I couldn't manually add the T-Mo APN to the phone (in fact it wouldn't take any APN).
I think the phone's hardware is capable of LTE/CDMA/GSM. It's a just matter of figuring out the right configuration.
ck9068 said:
Trying to make my XT1526 (Boost stock ROM) work with GSM, and got stuck on something weird. Inserted a SIM card from China Mobile, changed the network mode to "Global" and turned on roaming, after a while it got successfully registered on T-Mobile network, both voice and data. Yet, when I inserted a T-Mobile SIM card, the phone gave an "Invalid SIM card" error, and simply refused to connect. Thought it might be an issue with APN setting, but I couldn't manually add the T-Mo APN to the phone (in fact it wouldn't take any APN).
I think the phone's hardware is capable of LTE/CDMA/GSM. It's a just matter of figuring out the right configuration.
Click to expand...
Click to collapse
thats a DSU issue. Domestic sim unlock can be tricky
youdoofus said:
thats a DSU issue. Domestic sim unlock can be tricky
Click to expand...
Click to collapse
Why so tricky? Why? I am truly of no help, I just started the thread. Learning as I go...funny thing. Upon flashing again with the xt1527, and flashing the modem with a different modem software, the phone still shows to be a sprint modem software.
I wonder if the "fastboot oem config carrier" option would do any good?
DSU is tricky because it involved modifying the NV values thats buried in the radio software and it has a similar access issue to SU. I have (among many others) a Sprint S5 (G900P) and achieving DSU on it was the work of some SERIOUS developers. The config carrier might be of some help, but i havent delved into it yet, and im not sure if id fully understand what it means anyways. Additionally, Moto devices are tricky period. I had 2 Razrs (one xt 912 and one xt910), one of them was GSM unlockable and the other wasnt. Motorola mobile phone division has also changed hands recently, so its direction has also changed. Basically, whats needed here is either a ton of forum scouring or a developer to actually pay attention to this device, or a bit of both

SM-G965F on T-Mobile, what are my options?

So I learned the hard way that you can't have it all.
I travel for work quite a bit and I was in the Middle East working when my Verizon S7 Edge started to have problems. I looked for a replacement in Dubai and was happy to find the S9+ at a reasonable price and with the 256GB option (which I wasn't finding in the US). I popped in my Verizon sim and life was good.
Then I returned to the US and. nothing. worked. I had forgotten that Verizon was strictly CDMA in the US and this phone had no CDMA radio.
I also was noticing that the samsung pay app was locked to the UAE version which was annoying but not a huge issue...I couldn't add American Express credit card which may or may not have been due to that region setting.
So in order to actually get service I switched to T-Mobile and have had decent data rates. However the phone doesn't use volte or wifi calling which is very bad since where I am staying is somewhat of a dead spot for mobile coverage. I basically can't receive phone calls here and making a call requires me to wait about a minute for the phone to figure out what protocol to connect to (dowleveling to either a 3g or H to actually connect and dial).
My initial research tells me that I don't want to root the phone and lose all ability to use samsung pay, but I would love to do as much as I can to the phone to get it working as best as possible.
Can someone chime in here to let me know what's possible? I don't want to experiment too much, and it's been rare over the years for me to keep up with all the root/firmware/rom etc. that has become available. My last real era of rooting phones was many years ago with iPhone and even then it was a lot to keep up with.
thanks in advance!
bump.
Anyone?
I had the same issue. I ended up rooting to get TMobile volte/wifi-calling. Also, by rooting you can also use Verizon Wireless; however, only with LTE.
You could use Google Pay lol.
Furthermore, I suck at giving reasons, but that's what I did.
Don't quote me on this, but from what I understand, you can use the patched ODIN and flash the firmware's CSC outside of it's region and change it to XAA. There is also a guide to changing CSC without root that may work as well.
From what I understand, the G965F is unable to load the XAA csc without root since it is only for the Snapdragon version
I ended up using Tekhd's tmobile detonator after I bricked my G965F/DS atleast 3 times. It works great now.
The way to change csc without root is via a combination rom and using Realterm. Using TMB CSC on a global G965F/DS ROM will end up in a PUK code lock. I tried ALL the US CSC on my G965F to confirm this.

I have an unlocked S9+ originally from T-Mobile. WiFi Calling is gone.

OK, so I was with T-Mobile forever, and I bought this phone from them at launch. I decided to switch over to MetroPCS by T-Mobile because it's cheaper, so I paid off my phone then unlocked it (Even though I didn't need too, the Metro SIM worked in it before I unlocked it).
It worked fine for two weeks, and I had WiFi calling and everything, and then the RJ5 (I believe?) update came out, and when my phone booted up it said new sim detected, and WiFi calling was gone. My APN settings were set to MetroPCS', so I set it back to the T-Mobile one since it's essentially the same network, but the WiFi calling option is *completely* gone; it's not there, trust me. I call MetroPCS support and they said they can't enable it for devices that weren't bought from them, and I tried to argue like sure you can, send it up to a higher level support team, but I could hardly understand her and gave up.
I went into a MetroPCS store and they had a spare T-Mobile SIM, popped it in, boom WiFi calling was back.
Come OneUI Pie update one, I opt in and update, and voila, WiFi calling is back!
I just downloaded the second update last night, and now it's gone again. This **** is driving me crazy, if anyone can help me figure out a way to fix this I will love you forever.
Wow, that was a gripping good yarn! I think there's a good chance that if you switch to the unlocked G965U1 firmware, it might work. I have an unlocked Verizon S9+ running on TMO, and once I flashed it to U1, wifi calling and volte worked automatically. I'm not positive how it will be with Metro but it is worth looking into. When you flash the collect unlocked firmware, when the phone boots up it will detect your sim and then reboot and configure all the settings for you.
P.S. I don't suppose there's Metro firmware out there?
I don't think there's Metro firmware, because my updates still come from T-Mobile. T-Mobile owns Metro. So what you're saying is flash the firmware via Odin and my phone would be like truly unlocked and I would get updates from Samsung rather than T-Mobile? I don't want to go through all this if it isn't a a certain fix, but sadly there's no way to tell that.
YrrchSebor said:
Wow, that was a gripping good yarn! I think there's a good chance that if you switch to the unlocked G965U1 firmware, it might work. I have an unlocked Verizon S9+ running on TMO, and once I flashed it to U1, wifi calling and volte worked automatically. I'm not positive how it will be with Metro but it is worth looking into. When you flash the collect unlocked firmware, when the phone boots up it will detect your sim and then reboot and configure all the settings for you.
P.S. I don't suppose there's Metro firmware out there?
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Click to collapse
I don't think there's Metro firmware, because my updates still come from T-Mobile. T-Mobile owns Metro. So what you're saying is flash the firmware via Odin and my phone would be like truly unlocked and I would get updates from Samsung rather than T-Mobile? I don't want to go through all this if it isn't a a certain fix, but sadly there's no way to tell that.
For some carriers, the Wifi calling requires the phone to have carrier firmware. Verizon is one. I bought my 9+ from Samsung unlocked, and it didn't have wifi calling on Verizon until I reflashed the phone (using Patched ODIN) to a Verizon firmware and Wifi calling works... as does the Verizon bloat, but most of that can be disabled with Package Disabler pro or similar app.
creedicd said:
For some carriers, the Wifi calling requires the phone to have carrier firmware. Verizon is one. I bought my 9+ from Samsung unlocked, and it didn't have wifi calling on Verizon until I reflashed the phone (using Patched ODIN) to a Verizon firmware and Wifi calling works... as does the Verizon bloat, but most of that can be disabled with Package Disabler pro or similar app.
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Click to collapse
I don't think MetroPCS has it's own firmware for the s9+. Plus, they're owned by T-Mobile now. The plan I'm on is called MetroPCS by T-Mobile lol. This is driving me nuts.
C-4Nati said:
I don't think MetroPCS has it's own firmware for the s9+. Plus, they're owned by T-Mobile now. The plan I'm on is called MetroPCS by T-Mobile lol. This is driving me nuts.
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Click to collapse
Out of curiosity I read around a little bit and it seems to be really hit and miss, which definitely seems to match up with your experience. I did find this post on Reddit from someone saying they got Wi-Fi calling to work with a Metro Sim: https://www.reddit.com/r/tmobile/co...g_volte_not_working_with_metropcs_sim/cymnvhf
Have you come across that, tried any of that?
YrrchSebor said:
Out of curiosity I read around a little bit and it seems to be really hit and miss, which definitely seems to match up with your experience. I did find this post on Reddit from someone saying they got Wi-Fi calling to work with a Metro Sim: https://www.reddit.com/r/tmobile/co...g_volte_not_working_with_metropcs_sim/cymnvhf
Have you come across that, tried any of that?
Click to expand...
Click to collapse
I have not, thanks for the link, I shall try that. Funnily enough, there was a hotfix pushed out last night and WiFi calling not working was on that list. I now have the WiFi calling icon in the notification bar, and it shows like it's on, but it doesn't actually work, and me pressing it does nothing. The setting itself still isn't in connections or anywhere in the settings. This is so dumb, lol.

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