Thank you for the info, I have an SM-S908U1 with XAA/XAA CSC code, I hope someone can help me with which CSC should I patch it with to fix poor network issue.
To give more context, I live in Morocco, my phone used to work fine, I'm not sure what CSC code it has then.
I travelled to Turkey and used a Turkish SIM card there, it worked fine. I also installed the official January update while I was there.
I came back home and put back my Moroccan SIM card and network became really poor, barely no signal, and even when it shows LTE, it barely works.
I tried all the normal things, from resetting network setting to even factory resetting my phone, and I downgraded android to November's security patch version (using ODIN and ROM for SM-S908U1 XAA) in case the issue was caused by the newest update. None of those worked.
After a lot of research online, I now thing the guy I purchased the phone from maybe patched the phone but whatever he did was overwritten while I was abroad and maybe with the software update.
Now I wish someone can point me towards what CSC code should I patch, Morocco's CSC is MWD but it's for SM-S908E with Exynos and I'm worried downloading and patching it with that one can break it.
Thank you for reading all of this even if you have no clue about it