Add CSC to US unlocked firmware SM-G988U1 - Samsung Galaxy S20 / S20+ / S20 Ultra Questions &

I have a US unlocked S20 Ultra 5G (SM-G988U1), but I'm using it in the EU.
I'm missing certain features such as VoLTE, and think it has something do to with the CSC being XAA/XAA/XAA/XAA.
I would need the EUX multi-CSC firmware, but that only exists for the SM-G988B (international, exynos)
Is it possible to add missing CSCs to the U1 (snapdragon) firmware. Specifically EUX, ATO?

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SM-G9860 (BRI) Taiwan CSC change to SM-G986B (PHN) Netherlands

Hi guys,
i've been wanting to change the CSC of the S20+ I bought in Taiwan. I wanted to have the snapdragon variant of the S20+ but now it seems some features are not included in this version compared to the European models of the S20+.
I am missing integrated Hiya service for example.
Is it possible to flash the firmware for the European models on my Taiwanese model S20+?
If yes... how?
Thanks
Sobakel said:
Hi guys,
i've been wanting to change the CSC of the S20+ I bought in Taiwan. I wanted to have the snapdragon variant of the S20+ but now it seems some features are not included in this version compared to the European models of the S20+.
I am missing integrated Hiya service for example.
Is it possible to flash the firmware for the European models on my Taiwanese model S20+?
If yes... how?
Thanks
Click to expand...
Click to collapse
You cannot as they are 2 different models. However you need to change the csc from BRI Taiwan TGY Hong Kong to get Hiya service and any additional ones like Volte and WiFi calling. Please search and you will find thread detailing about how to change your csc.

S20+ SM-G9860 - is it possible to change CSC?

Can you please tell me if it is possible to change CSC (possibly without tripping KNOX) on imported S20+ SM-G9860 to some unbranded CSC in other Snapdragon region? Thank you.
p4ra said:
Can you please tell me if it is possible to change CSC (possibly without tripping KNOX) on imported S20+ SM-G9860 to some unbranded CSC in other Snapdragon region? Thank you.
Click to expand...
Click to collapse
You're in Slovakia correct? You may be able to change from TGY (Hong Kong) to BRI (Taiwan) and visa versa but not any US or Canada Regions. Only Exynos devices have multiple CSC's for your region.
Yes, mate. That is correct.
I was hoping to hear about possibility to switch to US or CAN. Thank you for coming back to me.
ask here man
https://r.tapatalk.com/shareLink/to...5&share_fid=3793&share_type=t&link_source=app
Sent from my SM-G988B using Tapatalk

Changing US TMO S20 5G to Spain Unbranded Firmware

I have an unlocked US TMO S20 5G that I would like to reset and use in Spain with my Spanish SIM card, but not with all the US TMO firmware etc.
Can I flash a Spanish unbranded/unlocked firmware or should I flash the unbranded US firmware?
Assuming I can flash the Spanish firmware, what are the procedures?
Thanks!
Spanish Firmware isn't compatible with Snapdragon devices, it's designed to operate alongside Exynos Chipsets. You may want to flash the US Unbranded Firmware SM-G981U1 and go from there.

Firmware sm-g9860 on sm-g986u ?

Is it possible to install firmware for S20+ sm-g9860 on a sm-g986u or u1 version ?
They're both snapdragon version, so i Wonder if it's possible...
No, it's not compatible with US variants.

Question Changing CSC but...

Hi, I have bought an S21 FE G990B Unlocked. From what I can see, now countries don't have their own unlocked firmware rather there is only one, EUX (or/and EUY?)
When I dial *#272*62826#, the CSC menu comes up but with an issue, I have only Vodafone CSCs.
Question: Is there a way to change Vodafone CSCs to all CSCs without using samkey?
Thanks.

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