How to change CSC with out any root or harm way!

[RimonRP]

How may I change my S23 ultra CSC without any issue like root or any way that harm my device. 

My device accepts OXM (SM-S918B)

[Devv_007]

You can do it with samfw tool but it'll break the OTA updates.

[RaviRajendran777]

How it will break?

[Devv_007]

Some part of CSC still remains same after changing,so it triggers the OTA.

[anbk]

*#272*IMEI_NUMBER#

[RimonRP]

Didn't work

[anbk]

Weird. I get this menu. This process resets your device so make sure to do backup

[anbk]

You also need to replace the IMEI_NUMBER part with you device imei

[RimonRP]

Is that change my device imei number ?

[anbk]

It resets device and installs selected region. No other changes.