Question Need help to Convert SM-F936U/DS ATT Fold 4 to Indian Fold 4 version?

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Adv.Chirag

Member
Aug 3, 2014
33
4
So I am using AT&T version Zfold 4 model SM-F936U/DS in India and my software version is as follows:

Build number
SP2A.220305.013.F936USQU1AVGA

Service provider software version
SAOMC_SM-F936U_OYN_GCF_12_0003
GCF/GCF.GCF/XAA

Its stuck on android 12 May update.

I want to flash Indian firmware to make it Indian version of Z fold 4 for faster updates and enabling the call recorder.

What do I need to do? Any help will be appreciated. If this is answered anywhere please provide links to that thread and I will delete this one.

I am totally confused about CSC, firmware version, carrier version etc.
 

ultramag69

Senior Member
Nov 6, 2007
5,970
1,059
Waratah
Not gonna happen without root, even then might be difficult.
The Indian model is a F936B model. Trying to flash the firmware on it is like trying to flash IOS on an android.
Did see a way to change CSC in the forum however I believe you needed to have the compatible variant as it needed the OXM ROM flashed 1st.
 
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Adv.Chirag

Member
Aug 3, 2014
33
4
Not gonna happen without root, even then might be difficult.
The Indian model is a F936B model. Trying to flash the firmware on it is like trying to flash IOS on an android.
Did see a way to change CSC in the forum however I believe you needed to have the compatible variant as it needed the OXM ROM flashed 1st.
Thanks for the reply. I am browsing the forums for a solution and so far have got nothing. I don't want to root the device as of now.
 
Dec 30, 2011
12
0
Not gonna happen without root, even then might be difficult.
The Indian model is a F936B model. Trying to flash the firmware on it is like trying to flash IOS on an android.
Did see a way to change CSC in the forum however I believe you needed to have the compatible variant as it needed the OXM ROM flashed 1st.
Hii have a zfold f936b bought from eBay.
It says IMEI is 00000000 and when I insert sim nothing happens.
Any idea what are my options ?
 

[email protected]

Senior Member
Apr 4, 2011
565
387
Cotswolds, England
So I am using AT&T version Zfold 4 model SM-F936U/DS in India and my software version is as follows:

Build number
SP2A.220305.013.F936USQU1AVGA

Service provider software version
SAOMC_SM-F936U_OYN_GCF_12_0003
GCF/GCF.GCF/XAA

Its stuck on android 12 May update.

I want to flash Indian firmware to make it Indian version of Z fold 4 for faster updates and enabling the call recorder.

What do I need to do? Any help will be appreciated. If this is answered anywhere please provide links to that thread and I will delete this one.

I am totally confused about CSC, firmware version, carrier version etc.
Your phone, F936U, is carrier locked to the U.S. network, AT&T, and if genuine, can only receive updates when connected on their network as unlike other models, AT&T issue their own firmware updates.

This model also has a locked bootloader which prevents the flashing of alternative stock firmware.

Also, it seems strange that a phone that was only launched in August 2022 would have a, "May", update. Install DevCheck, free from the Play Store and check if you have a clone phone.
 

[email protected]

Senior Member
Apr 4, 2011
565
387
Cotswolds, England
Hii have a zfold f936b bought from eBay.
It says IMEI is 00000000 and when I insert sim nothing happens.
Any idea what are my options ?
The phones efs/file is corrupt. See...


I have never been able to repair an efs/file but here is a link to someone who claims to have done so...

 

Adv.Chirag

Member
Aug 3, 2014
33
4
Your phone, F936U, is carrier locked to the U.S. network, AT&T, and if genuine, can only receive updates when connected on their network as unlike other models, AT&T issue their own firmware updates.

This model also has a locked bootloader which prevents the flashing of alternative stock firmware.

Also, it seems strange that a phone that was only launched in August 2022 would have a, "May", update. Install DevCheck, free from the Play Store and check if you have a clone phone.


I got it carrier unlocked. Everything works fine in India with major carriers, even getting 5G to work here. Attaching screenshots of DevCheck

Screenshot_20221221_121308_DevCheck.jpg
Screenshot_20221221_121320_DevCheck.jpg
 

[email protected]

Senior Member
Apr 4, 2011
565
387
Cotswolds, England
I got it carrier unlocked. Everything works fine in India with major carriers, even getting 5G to work here. Attaching screenshots of DevCheck

View attachment 5789875View attachment 5789881
Seems genuine. Your mention of a May update threw me.

It is running the F936USQU1AVGA firmware which it was launched with and therefore, has never received an update.

However, it is still a bootloader locked model, even though you have it carrier unlocked. The only way to update it is to insert an AT&T SIM card and connect to their network in the US. Other than that, you will need to do a search to see if there are any custom ROM's that utilises the locked AT&T bootloader. Alternatively, just carry on using it as it is
 

Adv.Chirag

Member
Aug 3, 2014
33
4
Seems genuine. Your mention of a May update threw me.

It is running the F936USQU1AVGA firmware which it was launched with and therefore, has never received an update.

However, it is still a bootloader locked model, even though you have it carrier unlocked. The only way to update it is to insert an AT&T SIM card and connect to their network in the US. Other than that, you will need to do a search to see if there are any custom ROM's that utilises the locked AT&T bootloader. Alternatively, just carry on using it as it is

Thanks for clearing these things for me. I appreciate it.
 
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ultramag69

Senior Member
Nov 6, 2007
5,970
1,059
Waratah
No experience with AT&T but if they release their firmware online then you should be able to download & flash latest using ODIN.
Good Luck....
 
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adv.ravi

New member
Dec 29, 2022
1
0
i dont think its possible, India phone comes with 2 physical sim slots or an esim option for the second sim where as the AT&T which you and I have, comes only with single physical sim.
 

chakraa2

Member
Dec 24, 2009
22
1
So I am using AT&T version Zfold 4 model SM-F936U/DS in India and my software version is as follows:

Build number
SP2A.220305.013.F936USQU1AVGA

Service provider software version
SAOMC_SM-F936U_OYN_GCF_12_0003
GCF/GCF.GCF/XAA

Its stuck on android 12 May update.

I want to flash Indian firmware to make it Indian version of Z fold 4 for faster updates and enabling the call recorder.

What do I need to do? Any help will be appreciated. If this is answered anywhere please provide links to that thread and I will delete this one.

I am totally confused about CSC, firmware version, carrier version etc.
Hi Chirag,

were you able to update your phone? I have the same model(SM-F936U/DS) and stuck with an old update and no new updates show up even though Andriod 13 has been rolled out for the Indian variants.

if there is no possibility of updating the phone then I might consider selling it! any help woud be appreciated.
 

Adv.Chirag

Member
Aug 3, 2014
33
4
Hi Chirag,

were you able to update your phone? I have the same model(SM-F936U/DS) and stuck with an old update and no new updates show up even though Andriod 13 has been rolled out for the Indian variants.

if there is no possibility of updating the phone then I might consider selling it! any help woud be appreciated.

There is no way I could find online to get the updates. Nothing works. The only way is to have US sim and be connected to AT&T network in US to get the update which is impossible. So I guess we are stuck with the old os version.
 
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chakraa2

Member
Dec 24, 2009
22
1
There is no way I could find online to get the updates. Nothing works. The only way is to have US sim and be connected to AT&T network in US to get the update which is impossible. So I guess we are stuck with the old os version.
Hi Chirag,

Thanks for the revert. Thats a bummer that we can't do anything with the update. I can still make my peace with the slow updates but having no updates especially the security updates is very concerning.

I will keep you posted in case I happen to come across any solution to this.

Regards,
Amit.
 
I would say just start going through the different csc that's how I got mine to show the new up date then I just went back to gfc
There is no way I could find online to get the updates. Nothing works. The only way is to have US sim and be connected to AT&T network in US to get the update which is impossible. So I guess we are stuck with the old os version.
I would say just start changing csc until it comes up that's how I got mine to show then January update and then I went back to GFC
 

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  • 1
    Hi Chirag,

    were you able to update your phone? I have the same model(SM-F936U/DS) and stuck with an old update and no new updates show up even though Andriod 13 has been rolled out for the Indian variants.

    if there is no possibility of updating the phone then I might consider selling it! any help woud be appreciated.

    There is no way I could find online to get the updates. Nothing works. The only way is to have US sim and be connected to AT&T network in US to get the update which is impossible. So I guess we are stuck with the old os version.
  • 2
    I got it carrier unlocked. Everything works fine in India with major carriers, even getting 5G to work here. Attaching screenshots of DevCheck

    View attachment 5789875View attachment 5789881
    Seems genuine. Your mention of a May update threw me.

    It is running the F936USQU1AVGA firmware which it was launched with and therefore, has never received an update.

    However, it is still a bootloader locked model, even though you have it carrier unlocked. The only way to update it is to insert an AT&T SIM card and connect to their network in the US. Other than that, you will need to do a search to see if there are any custom ROM's that utilises the locked AT&T bootloader. Alternatively, just carry on using it as it is
    1
    Not gonna happen without root, even then might be difficult.
    The Indian model is a F936B model. Trying to flash the firmware on it is like trying to flash IOS on an android.
    Did see a way to change CSC in the forum however I believe you needed to have the compatible variant as it needed the OXM ROM flashed 1st.
    1
    Seems genuine. Your mention of a May update threw me.

    It is running the F936USQU1AVGA firmware which it was launched with and therefore, has never received an update.

    However, it is still a bootloader locked model, even though you have it carrier unlocked. The only way to update it is to insert an AT&T SIM card and connect to their network in the US. Other than that, you will need to do a search to see if there are any custom ROM's that utilises the locked AT&T bootloader. Alternatively, just carry on using it as it is

    Thanks for clearing these things for me. I appreciate it.
    1
    No experience with AT&T but if they release their firmware online then you should be able to download & flash latest using ODIN.
    Good Luck....
    1
    Hi Chirag,

    were you able to update your phone? I have the same model(SM-F936U/DS) and stuck with an old update and no new updates show up even though Andriod 13 has been rolled out for the Indian variants.

    if there is no possibility of updating the phone then I might consider selling it! any help woud be appreciated.

    There is no way I could find online to get the updates. Nothing works. The only way is to have US sim and be connected to AT&T network in US to get the update which is impossible. So I guess we are stuck with the old os version.