Database Users

How to make Volte work on Samsung S7 edge (Sprint) for Reliance Jio

Hi,
I am totally a newbie to Android, just moved from IOS, so please bear with me.
I am trying to make Reliance Jio sim work on my Samsung S7 edge (Sprint). Data is working just fine through Reliance jio sim on my mobile. But I am not able to activate Volte on mobile, so calls are not getting through. The Volte turn on/off tab is missing. I searched on the internet and found out that Sprint's network does not support Volte, so they have disabled the tab for it.
My model is SM-G635P
What is the best way out?? Do i have to root my phone??
Thanks in advance.

I am not aware if this will work with Sprint, Carrier locked versions are a little different, plus its Snap Dragon but this is what i did.. You need to change the CSC usually but yours being a sprint one, there will be some modifications for sure , I am pretty sure you wont have an INS CSC in your phone, so you might have to change to a stock US or UK one or maybe T Mobile. I would wait for an expert to tell you that for sure
This is for Reliance JIO Users - You dont need to flash your ROM, you can change your firmware to INS CSC and it works.
1) i used the Phone Info App (Download from the Google Play Store) and saw what CSC Codes were available for me to change to.
2) I downloaded a new firmware from Sam Mobile - You can google for them entering your model no - G-935fD, i am not sure if they are available here in XDA as well
3) My phone supported India CSC (You can see supported CSC's using the Phone Info App so i downloaded the India one it could be different for others.
4) I then downloaded ODIN and used the tuorial in this forum to flash my phone and change the CSC code.
https://www.youtube.com/watch?v=7SK3IMprKVQ this is the link with a step to step guide.
5) After that i factory reset my phone and downloaded the July Update Patch.
My phone after that has been able to make calls and i can see the VOLTE symbol, depending on the firmware it should either automatically come or you might have to manually enable it.
Hope this helps everyone else also. Factory reset usually helps and downloading the latest update too..

The method above will not work with Sprint Phones. Attempting it may brick your phone.
Activating VoLTE will mostly require some work at the root level. Hope someone who has knowledge about it can help you.

x017in said:
The method above will not work with Sprint Phones. Attempting it may brick your phone.
Activating VoLTE will mostly require some work at the root level. Hope someone who has knowledge about it can help you.
Click to expand...
Click to collapse
Yes, thats what i told him the Sprint Carrier phones are very different and my method wouldnt work, its better he waits for an expert.

Hii..utkarsh86...I am currently using samsung s7 edge sm-G935F exoyns version from germany 1&1. I live in India and want to use jio VoLte. Is it possible for me to do so..if yes can you please tell me which firmware would support my phone. I tried phone info app but it does not show any available CSC is it fine if i flash it with any other firmware...please help..
Product Code: SM-G935FZDAXEG
PDA: G935FXXU1DQB7
CSC: G935FXEG1DQB2
Baseband: G935FXXU1DQB3
Bootloader: G935FXXU1DQB7

Try searching through the forums for your answer instead of posting another needless thread. I have answered how to fix the VoLte problem so please search.

Help which rom g930 ?

HI
I'm new user on this forum and i need a litle help, i'm using G930P sprint cdma with root in Europe itry to find on forum but i find anything about this case, and unfortunetly i don't have tethering and wifi caling and some another difrent opitons, some time ago i do firmaware which i have everyting but messages don't send and i'm back to stock firmaware unfortunetly i don't remember which rom it was...
Now my question is which rom i should do ? Maybe G930u but which one to have all option in my phone ? and how do it by flashfire or by odin like orginal firmaware ??

pawcio7777 said:
HI
I'm new user on this forum and i need a litle help, i'm using G930P sprint cdma with root in Europe itry to find on forum but i find anything about this case, and unfortunetly i don't have tethering and wifi caling and some another difrent opitons, some time ago i do firmaware which i have everyting but messages don't send and i'm back to stock firmaware unfortunetly i don't remember which rom it was...
Now my question is which rom i should do ? Maybe G930u but which one to have all option in my phone ? and how do it by flashfire or by odin like orginal firmaware ??
Click to expand...
Click to collapse
The u firmware is what you want. Just download the latest one... maybe pl2? It will unlock all radio bands. You may have to sim unlock it too. Root is unstable and still won't give you the all of the bands. The hardware is there, but the software controls them.
Sent from my SM-G930U using XDA-Developers Legacy app

lvpre said:
The u firmware is what you want. Just download the latest one... maybe pl2? It will unlock all radio bands. You may have to sim unlock it too. Root is unstable and still won't give you the all of the bands. The hardware is there, but the software controls them.
Thanks for yours answer and one question mor how do it by odin ? or by flashfire beceause i think is any possibility to do it without wipe beceause for sure i can not use home csc....
Click to expand...
Click to collapse

I already done new firmware XAS Pl2 for 930u it and now i have tethering but unfortunetly still i don't have wifi caling maybe i should do firmawre for sprint... ? i don't need cdma that was reason why i try XAS ?

pawcio7777 said:
I already done new firmware XAS Pl2 for 930u it and now i have tethering but unfortunetly still i don't have wifi caling maybe i should do firmawre for sprint... ? i don't need cdma that was reason why i try XAS ?
Click to expand...
Click to collapse
I don't think the U firmware supports wifi calling , I think with the modding of some files you can get it to work but being that your on a European carriers i wouldn't know which way to steer you

goonygugle said:
I don't think the U firmware supports wifi calling , I think with the modding of some files you can get it to work but being that your on a European carriers i wouldn't know which way to steer you
Click to expand...
Click to collapse
Can you tel me which files i should modding ? In Disabler Pro i see Wi-Fi Calling settings - com.samsung.tmowfc.wfcpref and it's look like Enabled but pckage size is 0,00mb,

pawcio7777 said:
Can you tel me which files i should modding ? In Disabler Pro i see Wi-Fi Calling settings - com.samsung.tmowfc.wfcpref and it's look like Enabled but pckage size is 0,00mb,
Click to expand...
Click to collapse
who is your carrier ?

orange but i don't see option in phone to switch on wifi calling

And now i have another question which firmware i should do to g925v and to g928p to have all normal option in Europe ?

How i can unlock sprint in g935p/u to using it in europe ?

bixby voice

I need csc zip file for s6 edge plus at&t (SM-G928A) for installing bixby voice (with process)
And aslo i want to know can we install csc by abd method .

i used Khonglio oms csc zip - it has all the cscs you would ask for ...
I deleted all the international ones out of it and made a much smaller austrailian one - you can do this to get the American one.
You will lose any Volte though

I have Dr. Ketan ROM for Note 5 installed in my S6 Edge+. How can I enable Bixby?

beargeo said:
i used zip - it has all the cscs you would ask for ...
I deleted all the international ones out of it and made a much smaller austrailian one - you can do this to get the American one.
You will lose any Volte though
Click to expand...
Click to collapse
The Khonglio oms csc can be used with different roms to get your particular csc?

desmond462 said:
The Khonglio oms csc can be used with different roms to get your particular csc?
Click to expand...
Click to collapse
Hello!
I'm using Rom Khongloi v11 on my G928G. What is the acronym for CSC that I must install to have Bixby Voice?
Thank you! ??

SM-Cryterions said:
Hello!
I'm using Rom Khongloi v11 on my G928G. What is the acronym for CSC that I must install to have Bixby Voice?
Thank you! ??
Click to expand...
Click to collapse
you got to go for the american one-

beargeo said:
i used Khonglio oms csc zip - it has all the cscs you would ask for ...
I deleted all the international ones out of it and made a much smaller austrailian one - you can do this to get the American one.
You will lose any Volte though
Click to expand...
Click to collapse
Plz, i'm on infinity S8 port Rom S6, (incredible Rom) , can i use Khongloi V11 oms csc with this Rom to get particular csc (XAA) , only to enable Bixby voice ?
thank u.

pswaroop98 said:
I need csc zip file for s6 edge plus at&t (SM-G928A) for installing bixby voice (with process)
And aslo i want to know can we install csc by abd method .
Click to expand...
Click to collapse
pls help for all.i am also using same device

Would like to install TMO Rom on S8 SM-G950FD

Hello. I recently purchased an unlocked Galaxy S8. The model number is SM-G950FD. I am wondering if it is possible that I can be able to put the North American Tmobile Rom on it. Reason is that since I am using on TMO, I dont have access to VOLTE or WiFi Calling. Is there any workaround to be able to activate and or use?

saint79 said:
Hello. I recently purchased an unlocked Galaxy S8. The model number is SM-G950FD. I am wondering if it is possible that I can be able to put the North American Tmobile Rom on it. Reason is that since I am using on TMO, I dont have access to VOLTE or WiFi Calling. Is there any workaround to be able to activate and or use?
Click to expand...
Click to collapse
Yes, root and flash a rom like king rom.
No to
---------- Post added at 08:30 PM ---------- Previous post was at 08:29 PM ----------
this.guy.lol said:
Yes, root and flash a rom like king rom.
No to
Click to expand...
Click to collapse
No you can't flash American fw to a UK phone.

this.guy.lol said:
Yes, root and flash a rom like king rom.
No to
---------- Post added at 08:30 PM ---------- Previous post was at 08:29 PM ----------
No you can't flash American fw to a UK phone.
Click to expand...
Click to collapse
How would I then be able to get VOLTE & WiFi Calling to work? Is there a way?

saint79 said:
How would I then be able to get VOLTE & WiFi Calling to work? Is there a way?
Click to expand...
Click to collapse
Its built into to the ROM. I have it on mine and I have both cricket and tmo as,service providers. Never use tmo tho or eofi calling or volte since for me, my 3G connection is more faster and better Call signal,than 4G lte

this.guy.lol said:
Its built into to the ROM. I have it on mine and I have both cricket and tmo as,service providers. Never use tmo tho or eofi calling or volte since for me, my 3G connection is more faster and better Call signal,than 4G lte
Click to expand...
Click to collapse
Ok. But my phone is the international one. The options to activate and or turn on the features are not there. How can I accomplish this? Any and all help would be appreciated

You would root the phone and then install TKKG1994's CSC selection and choose XAA or XAA>TMB
In reality this is a phone defining decision: Rooting means no samsung pay. hint, 950fd can handle everything that a 950f can
Likely you would want to run a custom rom with the rooting. That means (with root) no more automatic system updates from samsung. Instead you would come here and update the rom as the developer pushes updates.
I do run this setup, presently using a 950F + TKKG's Ironman (note 8 port) rom + S8 XAA CSC from TKKG1994's S8 CSC's selection on T-mobile with volte and wifi calling. I have also run the Batman rom +S8 TMB CSC with the same success.

rp3 said:
You would root the phone and then install TKKG1994's CSC selection and choose XAA or XAA>TMB
In reality this is a phone defining decision: Rooting means no samsung pay. hint, 950fd can handle everything that a 950f can
Likely you would want to run a custom rom with the rooting. That means (with root) no more automatic system updates from samsung. Instead you would come here and update the rom as the developer pushes updates.
I do run this setup, presently using a 950F + TKKG's Ironman (note 8 port) rom + S8 XAA CSC from TKKG1994's S8 CSC's selection on T-mobile with volte and wifi calling. I have also run the Batman rom +S8 TMB CSC with the same success.
Click to expand...
Click to collapse
Excellent setup! Idk how Samsung pay is broken, Magisk root doesn't affect Sammy pay. Least not for me. But heither to, why would anyone use Sammy pay when android pay is more optimal? Just my personal thoughts on it. I know before it messed it up and certain apps wouldn't work like pogo and Mario run due to root but since than all seems golden and all apps work now. I live in the US so Sammy pay doesn't work on a UK s8+ by default. Even before i initially rooted anyways didnt work but the concept is the same for those overseas. Root or no root. To the OP in question, I wouldn't let a downfall of an app stop you from rooting. So much you can do, dual speaker mod, camera mod, youtube with no ads and background play, etc. Its amazing!
For the 2nd, the #1 ROM in my thoughts for speed, smoothness and customizable is without a doubt kingrom v7. V2 is a tad better but 7 is where its at. I've been on every rom except Google edition and I love kingrom. Was on Batman for a time howver the overall feel and smoothness, was eh. downloads and everything else wasn't up to par plus my downloads were slow compared to kingrom and king has some snappy load times much like the s5 had on twist3d sixx rom. I do run a different set up/debloat than most anyone probably. But for what it is, love it!
Kingrom + king kernel + modded settings, my own custom splash screen and boot screen along with dual speaker with aryamod plus camera mod is simply amazing! I use the CSC BTU unbranded since for me it pulls the best signal for where I'm at and I love it.

Update
saint79 said:
Hello. I recently purchased an unlocked Galaxy S8. The model number is SM-G950FD. I am wondering if it is possible that I can be able to put the North American Tmobile Rom on it. Reason is that since I am using on TMO, I dont have access to VOLTE or WiFi Calling. Is there any workaround to be able to activate and or use?
Click to expand...
Click to collapse
Hey, I recently purchased a SM-G950FD and I am also on Tmobile and need to get WIFI calling to work as well. Did you have any luck? If so can you point me in the right direction? Thanks!

Help please, I flashed rom and ruined phone

Sorry, but I am a newbie so forgive me if this is stupid!
1 I had a slight battery problem so decided (why??) to flash the rom on my unlocked S7 edge. I used the 'BTU' version.
2 after flashing rom i cannot make or receive voice calls
3 i went into a samsung store they said it was an unlocked SM-G935F and had 'XEU' firmware.
4 they kindly reflashed this for me but it didn't solve the problem
5 I have just tried downloading and reflashing again with the XEU firmware. But I still cannot make or receive calls
one weird thing is that the odd text seems to get through to me
Anyone got any ideas on how to unbrick my phone? Very much appreciated.
Sorry, one extra piece of information. I am on '3'. But if I put an O2 sim in the phone it can make and receive calls. But before my first flashing it worked fine with '3'.
It seems I must have flashed the wrong firmware but have no idea what was on there. The previous owner used a EE sim in it. But it was bought not locked to a network - i think. There was no network branding on the phone.

bobbaker1970 said:
Sorry, but I am a newbie so forgive me if this is stupid!
1 I had a slight battery problem so decided (why??) to flash the rom on my unlocked S7 edge. I used the 'BTU' version.
2 after flashing rom i cannot make or receive voice calls
3 i went into a samsung store they said it was an unlocked SM-G935F and had 'XEU' firmware.
4 they kindly reflashed this for me but it didn't solve the problem
5 I have just tried downloading and reflashing again with the XEU firmware. But I still cannot make or receive calls
one weird thing is that the odd text seems to get through to me
Anyone got any ideas on how to unbrick my phone? Very much appreciated.
Sorry, one extra piece of information. I am on '3'. But if I put an O2 sim in the phone it can make and receive calls. But before my first flashing it worked fine with '3'.
It seems I must have flashed the wrong firmware but have no idea what was on there. The previous owner used a EE sim in it. But it was bought not locked to a network - i think. There was no network branding on the phone.
Click to expand...
Click to collapse
Hey, can it boot? If yes then flash a custom rom. Some custom roms have multi csc options. Make sure to enable oem unlock before doing anything and flash modded twrp and take full backup
Sent from my Galaxy S7 Edge using XDA Labs

gupt07ash said:
Hey, can it boot? If yes then flash a custom rom. Some custom roms have multi csc options. Make sure to enable oem unlock before doing anything and flash modded twrp and take full backup
Sent from my Galaxy S7 Edge using XDA Labs
Click to expand...
Click to collapse
Yes it boots and works ok with an O2 sim but not with my '3' sim. Everything else works fine.
Thanks for your reply. But I don't want to use a custom rom. I want to get my stock rom working.
Does anyone know of a solution to this problem please?
Would it be possible to flash the wrong CSC - for example and American CSC - I am in Europe and on European CSC?
Many thanks
Bob

bobbaker1970 said:
Yes it boots and works ok with an O2 sim but not with my '3' sim. Everything else works fine.
Thanks for your reply. But I don't want to use a custom rom. I want to get my stock rom working.
Does anyone know of a solution to this problem please?
Would it be possible to flash the wrong CSC - for example and American CSC - I am in Europe and on European CSC?
Many thanks
Bob
Click to expand...
Click to collapse
Take a look at my thread.
https://forum.xda-developers.com/s7-edge/how-to/g935fd-twrp-backup-t3917485
Sent from my Galaxy S7 Edge using XDA Labs
---------- Post added at 05:06 PM ---------- Previous post was at 05:05 PM ----------
Yes you can install multi csc via root explorer.
Sent from my Galaxy S7 Edge using XDA Labs

gupt07ash said:
Take a look at my thread.
https://forum.xda-developers.com/s7-edge/how-to/g935fd-twrp-backup-t3917485
Sent from my Galaxy S7 Edge using XDA Labs
---------- Post added at 05:06 PM ---------- Previous post was at 05:05 PM ----------
Yes you can install multi csc via root explorer.
Sent from my Galaxy S7 Edge using XDA Labs
Click to expand...
Click to collapse
I'm really not sure why you suggest everyone to install TWRP? People with less knowledge shoudn't know that flashing twrp will break the knox and they won't be able to use secure folder etc. Please put more information with such suggestions.

rroyy said:
I'm really not sure why you suggest everyone to install TWRP? People with less knowledge shoudn't know that flashing twrp will break the knox and they won't be able to use secure folder etc. Please put more information with such suggestions.
Click to expand...
Click to collapse
They're probably already tripping Knox if they're here and seeking help.
I'm replying coz nobody else did and it's merely a suggestion.
Twrp can save a bricked device and it's important to make backups before experimenting. They're not kids ffs
Sent from my Galaxy S7 Edge using XDA Labs
---------- Post added at 05:53 PM ---------- Previous post was at 05:51 PM ----------
Since this guy quoted me, he'll provide you whatever csc you need
Goodbye
Sent from my Galaxy S7 Edge using XDA Labs

gupt07ash said:
They're probably already tripping Knox if they're here and seeking help.
I'm replying coz nobody else did and it's merely a suggestion.
Twrp can save a bricked device and it's important to make backups before experimenting. They're not kids ffs
Sent from my Galaxy S7 Edge using XDA Labs
---------- Post added at 05:53 PM ---------- Previous post was at 05:51 PM ----------
Since this guy quoted me, he'll provide you whatever csc you need
Goodbye
Sent from my Galaxy S7 Edge using XDA Labs
Click to expand...
Click to collapse
I still believe you've to warn them.
---------- Post added at 19:56 ---------- Previous post was at 19:54 ----------
bobbaker1970 said:
Sorry, but I am a newbie so forgive me if this is stupid!
1 I had a slight battery problem so decided (why??) to flash the rom on my unlocked S7 edge. I used the 'BTU' version.
2 after flashing rom i cannot make or receive voice calls
3 i went into a samsung store they said it was an unlocked SM-G935F and had 'XEU' firmware.
4 they kindly reflashed this for me but it didn't solve the problem
5 I have just tried downloading and reflashing again with the XEU firmware. But I still cannot make or receive calls
one weird thing is that the odd text seems to get through to me
Anyone got any ideas on how to unbrick my phone? Very much appreciated.
Sorry, one extra piece of information. I am on '3'. But if I put an O2 sim in the phone it can make and receive calls. But before my first flashing it worked fine with '3'.
It seems I must have flashed the wrong firmware but have no idea what was on there. The previous owner used a EE sim in it. But it was bought not locked to a network - i think. There was no network branding on the phone.
Click to expand...
Click to collapse
Try flashing XEU rom via odin but use CSC file instead of Home CSC you'll loose your data so don't forget to take a backup via Smart Switch.
one more suggestion flash older firmware (again 8.0) from XEU later connect your device to pc and update to latest via smart switch.

rroyy said:
I still believe you've to warn them.
---------- Post added at 19:56 ---------- Previous post was at 19:54 ----------
Try flashing XEU rom via odin but use CSC file instead of Home CSC you'll loose your data so don't forget to take a backup via Smart Switch.
one more suggestion flash older firmware (again 8.0) from XEU later connect your device to pc and update to latest via smart switch.
Click to expand...
Click to collapse
Many thanks that sounds like an interesting idea.
But.............. if I go back to the first version of 8.0 (oreo) will it wreck Knox or anything else to do with security. I want to still be able to use samsung pay for example.
Also, i was told by a samsung shop person that you can't downgrade because there are systems in place to stop you. Though i dont know if he meant from 8 to 7 or from recent 8 to older 8.
I am planning to flash this:
https://www.sammobile.com/firmwares/galaxy-s7-edge/SM-G935F/XEU/download/G935FXXU2EREM/222561/
due to fact that its original software was xeu. Is that ok?
Your help was very valuable thank you
Bob

bobbaker1970 said:
Many thanks that sounds like an interesting idea.
But.............. if I go back to the first version of 8.0 (oreo) will it wreck Knox or anything else to do with security. I want to still be able to use samsung pay for example.
Also, i was told by a samsung shop person that you can't downgrade because there are systems in place to stop you. Though i dont know if he meant from 8 to 7 or from recent 8 to older 8.
I am planning to flash this:
https://www.sammobile.com/firmwares/galaxy-s7-edge/SM-G935F/XEU/download/G935FXXU2EREM/222561/
due to fact that its original software was xeu. Is that ok?
Your help was very valuable thank you
Bob
Click to expand...
Click to collapse
you wont break the knox and you don't have to go that much back just download 2 version back from january or february will be enough.
you can't downgrade your bootloader or turn back to android 7.0 that's what they mean. Smart Switch shpuld fix the problem for you.

rroyy said:
you wont break the knox and you don't have to go that much back just download 2 version back from january or february will be enough.
you can't downgrade your bootloader or turn back to android 7.0 that's what they mean. Smart Switch shpuld fix the problem for you.
Click to expand...
Click to collapse
Many many thanks again Rroyy
Forgive me but I am new to this.
So are you saying:
1. Download:
https://www.sammobile.com/firmwares/galaxy-s7-edge/SM-G935F/XEU/download/G935FXXS3ERLF/251612/
That's the last but one from January 19.
Which has: PDA G935FXXS3ERLF
CSC G935FXEU3ERKF
2. Can I just flash that. Or must I remove the bootloader from that package and put in the current bootloader?
And I was presuming I would do all of that with Odin??? Am I wrong. Is there a way of doing it with smartswitch? (I have reset the phone and got rid of all of my information already)
update: tried flashing last rom , that didnt work. the one before wouldn't flash - i notice it has numbers'3' in the various codes rather than 4.
still not solved
Many thanks again
Bob

bobbaker1970 said:
Many many thanks again Rroyy
Forgive me but I am new to this.
So are you saying:
1. Download:
https://www.sammobile.com/firmwares/galaxy-s7-edge/SM-G935F/XEU/download/G935FXXS3ERLF/251612/
That's the last but one from January 19.
Which has: PDA G935FXXS3ERLF
CSC G935FXEU3ERKF
2. Can I just flash that. Or must I remove the bootloader from that package and put in the current bootloader?
And I was presuming I would do all of that with Odin??? Am I wrong. Is there a way of doing it with smartswitch? (I have reset the phone and got rid of all of my information already)
Many thanks again
Bob
Click to expand...
Click to collapse
Flash the os via odin (select CSC file not home CSC) Untick re-partition option on odin. (Instructions)
Select all files except home_CSC from odin. BL-CP-AP and CSC
After your device boots, skip settings till you see the home page. Connect your device to pc and launch smartswitch (It could ask you to install smart switch to your device) and update latest firmware over smart switch.

rroyy said:
Flash the os via odin (select CSC file not home CSC) Untick re-partition option on odin. (Instructions)
Select all files except home_CSC from odin. BL-CP-AP and CSC
After your device boots, skip settings till you see the home page. Connect your device to pc and launch smartswitch (It could ask you to install smart switch to your device) and update latest firmware over smart switch.
Click to expand...
Click to collapse
Many thanks again Rroyy
Unforunately, I am getting nowhere. And cannot get my phone to work.
Odin will not let me flash any files which have '3' rather than 4 in them. For example I can flash
BL_G935FXXS4ESC1_CL14843133_QB22373776_REV00_user_low_ship.tar.md5
Because it is FXXS4.... the '4' being the important bit
But I cannot flash:
BL_G935FXXU3ERL3_CL14843133_QB20951136_REV00_user_low_ship.tar.md5
because it is FXXU3.... the '3' being the important bit
This seems to reduce me down to the last firmware for both XEU and BTU neither of which enable me to make calls on '3' network like I have done for months before flashing.
Thanks for all of your kind help
It looks like my phone is bricked (
All the best
Bob

bobbaker1970 said:
Many thanks again Rroyy
Unforunately, I am getting nowhere. And cannot get my phone to work.
Odin will not let me flash any files which have '3' rather than 4 in them. For example I can flash
BL_G935FXXS4ESC1_CL14843133_QB22373776_REV00_user_low_ship.tar.md5
Because it is FXXS4.... the '4' being the important bit
But I cannot flash:
BL_G935FXXU3ERL3_CL14843133_QB20951136_REV00_user_low_ship.tar.md5
because it is FXXU3.... the '3' being the important bit
This seems to reduce me down to the last firmware for both XEU and BTU neither of which enable me to make calls on '3' network like I have done for months before flashing.
Thanks for all of your kind help
It looks like my phone is bricked (
All the best
Bob
Click to expand...
Click to collapse
Bob, can you flash latest XEU? We are going to get new security patch update in few weeks. April security patch not yet release. If you can flash latest XEU you can update your device to upcoming update via Smart Switch.

Still bricked: cannot make calls
Thanks for help everyone.
I thought I would give you my conclusions so far in case they are helpful to anyone.
1 My phone was working perfectly for SMS, phone calls and data on the '3' network.
2 Because the battery life didn't seem good I decided to flash it
3 It turns out my phone was initially sold with 'XEU' firmware. But I didn't know that and so I flashed it with 'BTU' firmware - the latest edition.
4 As a result the phone could not make or receive calls on the '3' network. But... it can make and receive calls on the 'O2' network. However, '3' is my contract network and so I want to stay with that. Also, I think the companies are running down 2G transmissions ?? so eventually I may have problems with O2 .
FYI it seems the problem may be that the phone is not sending or receiving certain frequencies as otherwise why would it work ok on O2 but not 3??
**********Tried to resolve by:
5 New sim card
6 Factory reset
7 Clear partition
8 Flashing, again. I tried:
a latest XEU
b latest BTU
c previous XEU
d previous BTU
e previous XEU but with the modem file from EE
f previous XEU but with the modem file from 3
g previous XEU again but then did an over the air update to current XEU
Non of them worked.
*****Conclusion
My phone still will not make or receive calls on the 3 network - it won't register on the network (yes I have tried resetting, selecting network etc etc). It sometimes works with text messages though?? And 4G sometimes works. Otherwise the phone works perfectly, just not for phone calls.
Again on the O2 network all seems to work and I can make and receive calls.
So, to for me, it is bricked in that I can't use it as a phone.
I find it completely inexplicable that I can't get it to work on 3 for calls. There doesn't seem any logic to it.
But thanks everyone for all of your kind help. If anyone has any more suggestions I am willing to try them. Especially if they know how to turn on the relevant frequencies on the phone.
Bit of info: Samsung kindly ran a test to check the reception and transmission of signals. But the test wouldn't even start because it couldn't test the first frequency (apparently it should test lots).

RRoyy
Many thanks again for your reply. You've been very kind with your time.
Yes I can flash the current XEU but it still doesn't work. And I flashed the previous XEU and then did an update using over the air from the phone. But still it doesn't work.
Very best wishes
Bob

Weird
I put an EE sim into my phone (the previous owner had bought it unlocked but used it with an EE contract).
Then I put my '3' sim into my phone. And............ I was able to make one!! call.
After that it stopped working.
That was on XEU where I had downloaded the previous version and let it update over the air.
Does this in any way help diagnose the problem??
Thanks again.

bobbaker1970 said:
RRoyy
Many thanks again for your reply. You've been very kind with your time.
Yes I can flash the current XEU but it still doesn't work. And I flashed the previous XEU and then did an update using over the air from the phone. But still it doesn't work.
Very best wishes
Bob
Click to expand...
Click to collapse
Flash that version and update via smart switch please not ota. I've XEU device and I flashed btu many times to my device never had any problem. Than I update my device to TUR to get updates released bu Turkish operators.
There must be something about installization process that's why I'm asking you to update your device over pc via Smart Switch.

Thank you again RRoyy
I shall do as you suggest.
I think you are saying:
1 Flash previous version of XEU???
2 Then update to current version of XEU using 'smart switch'
3 Should I flash with my '3' sim card in the phone. Or not?
Is that correct?
Also, a small point but I didn't know smartswitch could update firmware. I have never used it. But shall give it a try.
If you could please tell me if the above is correct before I do it I would be most grateful. And thank you again for your time.
Side note: Today I tried an EE sim. It does work, but only on 2G. Not on 3G or auto switch. So, it may be the case that the original flashing of BTU that I did first of all somehow made the phone only 2G? Is that possible?
++Update. Smartswitch spent ages trying to update but failed at the last bit. IT downloaded the software but failed on installation. I have no idea why.
Any suggestions??
Best wishes
Bob

Hello again. So I still haven't had any luck.
I flashed the BTU before the current version. But then the smartswitch wouldn't update it to the current version. It claimed it was already current. It wouldn't update over the air either.
I then flashed the XEU before the current version and I DID manage to get smartswitch to update it to the current version. But '3' sim still not working.
It seems that the problem revolves around certain frequencies that do/don't work on my phone. I suppose it could be a hardware issue though that is unlikely seeing as it happened immediately after I flashed the phone for the first time.
This gives rise to two quesions:
1 Does flashing the firmware get rid of EVERYTHING on the phone. Or does it leave residual bits of information that aren't overwritten?
2 Perhaps the problem is the 'CP' software which seems to be the same for all the options I can flash.
3 If I could flash with firmware from another country with a different CP file perhaps that might push the phone into action.
4 Is there a way to check what frequencies my phone can and cannot receive transmit. I don't mean the specifications. I mean the actual received/transmitted frequencies/bands.
Many thanks again.
Finally, apologies for posting this without logging in but there is a problem with trying to login to the forum on this Chromebook. The space for name and password is not visible. Works ok in windows 10 but not on my chromebook.
Best wishes
Bob

1) Yes I believe the efs of the phone is not wiped when flashing software. Everything else is wiped.
2) You could try another country rom. Just make sure the model number is the same. Changing the CP could work as CP is the modem file.