Any custom ROM that allows setting cellular data and network type independently?

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Senior Member
Sep 7, 2017
Samsung Galaxy S9+
The stock ROM allows 4G network only on the SIM that's set for Mobile Data.

Is there any custom ROM that would make it independent? Something like setting Mobile data to SIM 1 and its network mode to 3G, and have the second SIM for voice only with 4G network.

I haven't rooted the phone yet but if there's solution to this, I'm fine with rooting and flashing custom ROM.