Volte on unlocked g956u1

melonhead7007 · Nov 20, 2018

This post is to spread the knowledge about the recent software beta update android pie / one ui for the s9+ us( snapdragon variant ).
A lot of people including me faced a problem of not being able to use volte and wifi calling on us phones specially with Indian networks like JIO.
The update was manually installed using this link ,
https://www.theandroidsoul.com/galaxy-s9-plus-android-9-pie-download-one-ui/
There is no need to flash anything or change any csc , my csc status is still XAA but jio works just fine.
Volte automatically with the first boot itself was turned on.
Wifi calling keeps disabling but people update if your work !
Shoutout to all the people stuck with unlocked ( actually locked xD ) phones to use volte features.

rythym05392 · Jan 12, 2019

Your post brings new hopes for me. I have a Unlocked T Mobile Galaxy S9 with TMB CSC on it. I have a few questions
1) Is your original device 965U1 or you flashed 965U1 firmware to your 965U device ?
2) What was the CSC on your phone prior to Android Pie update you made ?
3) With Jio did you have a challenge where you couldn't make calls from direct phone dialler and had to use Jio voice ? But now Jio voice is no longer needed after android Pie Update ?
4) Did you have Jio SIM inside phone while doing update or removed it ? I see posts saying that SIM inside phone influences CSC Config
5) I assume Samsung Pay is still a no go in India with XAA CSC. Please confirm.

melonhead7007 · Jan 17, 2019

rythym05392 said:
Your post brings new hopes for me. I have a Unlocked T Mobile Galaxy S9 with TMB CSC on it. I have a few questions
1) Is your original device 965U1 or you flashed 965U1 firmware to your 965U device ?
2) What was the CSC on your phone prior to Android Pie update you made ?
3) With Jio did you have a challenge where you couldn't make calls from direct phone dialler and had to use Jio voice ? But now Jio voice is no longer needed after android Pie Update ?
4) Did you have Jio SIM inside phone while doing update or removed it ? I see posts saying that SIM inside phone influences CSC Config
5) I assume Samsung Pay is still a no go in India with XAA CSC. Please confirm.

1. Original device - 965u1
2. Csc prior to update was XAA and still is the same.
3. Yes , i couldn't make calls before the update without the jio voice app. But after the update , normal dialer works just fine.
4. That really doesn't make a difference . Mine was in the phone during the update. The csc is still XAA , flashing pie didn't change the csc , only due to the beta nature or the update , samsung might have made some changes and a mistake served us as a boon.
5. Samsung pay works just fine for me , using in India.

There's a reason why wifi calling doesn't work on this beta is because the csc is only loaded with config supporting sim cards from US. Preloaded config are from companies like sprint , tmobile, etc. Hence , no change in csc means no change on config and thus wifi calling on jio doesn't work.

Another update , only update to beta 1 and stay on it , in beta 2 , they fixed this mistake making any volte carrier non working again .

rythym05392 · Jan 20, 2019

melonhead7007 said:
1. Original device - 965u1
2. Csc prior to update was XAA and still is the same.
3. Yes , i couldn't make calls before the update without the jio voice app. But after the update , normal dialer works just fine.
4. That really doesn't make a difference . Mine was in the phone during the update. The csc is still XAA , flashing pie didn't change the csc , only due to the beta nature or the update , samsung might have made some changes and a mistake served us as a boon.
5. Samsung pay works just fine for me , using in India.

There's a reason why wifi calling doesn't work on this beta is because the csc is only loaded with config supporting sim cards from US. Preloaded config are from companies like sprint , tmobile, etc. Hence , no change in csc means no change on config and thus wifi calling on jio doesn't work.

Another update , only update to beta 1 and stay on it , in beta 2 , they fixed this mistake making any volte carrier non working again .

It is bad news that XAA CSC no longer supports JIO volte. I thought Android Pie brought in a fix for this issue.
I have the S9, and not sure if the same bug in Beta 1 as in S9+ that you saw is true for the S9.

rajeshca911 · Mar 21, 2019

melonhead7007 said:
1. Original device - 965u1
2. Csc prior to update was XAA and still is the same.
3. Yes , i couldn't make calls before the update without the jio voice app. But after the update , normal dialer works just fine.
4. That really doesn't make a difference . Mine was in the phone during the update. The csc is still XAA , flashing pie didn't change the csc , only due to the beta nature or the update , samsung might have made some changes and a mistake served us as a boon.
5. Samsung pay works just fine for me , using in India.

There's a reason why wifi calling doesn't work on this beta is because the csc is only loaded with config supporting sim cards from US. Preloaded config are from companies like sprint , tmobile, etc. Hence , no change in csc means no change on config and thus wifi calling on jio doesn't work.

Another update , only update to beta 1 and stay on it , in beta 2 , they fixed this mistake making any volte carrier non working again .

can you send please send beta1 or beta2 link or the build number of the beta firmware

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