[Q] Firmware Baseband / CSC / PDA affects signal? - Galaxy S 4 Mini Q&A, Help & Troubleshooting

Hi everyone!
Me and a colleague bought s4 minis a month or so after it was released here in Sweden. Both of us are running CM10.1 but there is a big difference. He has very good signal strength just like he had with his old phone. My signal strength is ranging from zero to decent while I also had very good signal strength with my old phone.
I checked his baseband version and he got I9195XXUAMG8 (latest baseband for many countries in mid/south/east europe) while I have I9195XXUAMH1 (latest version for the Nordic countries). My baseband version better fits the location as Sweden is a nordic country.
Both of us bought the phones in recognized, domestic shops and ran all OTA upgrades before installing CM.
My question is: could these differences in firmware affect the signal strength?
I did some research and found out that the CSC portion only contains carrier settings for data, what about the other parts?

folo81 said:
Hi everyone!
Me and a colleague bought s4 minis a month or so after it was released here in Sweden. Both of us are running CM10.1 but there is a big difference. He has very good signal strength just like he had with his old phone. My signal strength is ranging from zero to decent while I also had very good signal strength with my old phone.
I checked his baseband version and he got I9195XXUAMG8 (latest baseband for many countries in mid/south/east europe) while I have I9195XXUAMH1 (latest version for the Nordic countries). My baseband version better fits the location as Sweden is a nordic country.
Both of us bought the phones in recognized, domestic shops and ran all OTA upgrades before installing CM.
My question is: could these differences in firmware affect the signal strength?
I did some research and found out that the CSC portion only contains carrier settings for data, what about the other parts?
Click to expand...
Click to collapse
You're right about CSC. It also affect use of KIES (I don't use it much, but is good for emergency recovery), which means you won't get updates via KIES. in your case I would suggest you to try different ROM (I9195XXUAMH2_I9195OXXAMH4_BTU). Use Odin and see if it makes any difference.

Flashed I9195XXUAMG8 baseband (latest baseband for many countries in mid/south/east europe) and my initial tests look just as bad as with the nordic baseband. However I found out that my colleague changed operator so it might just be that his operator's 4g coverage is better. I tested for a short while with 3g only and my reception was as good as with my old phone.
Will report back later for anyone who is interested...

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Griffdaddy1 said:
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Click to expand...
Click to collapse
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