Can I flash 925-I firmware to 925-F firmware?

I have samsung s6 edge (SM-G9125F) from UAE. I am using in India right now. But now i am facing a issue that VoLTE is not supporting to my mobile. while same mobile (SM-G925I) is working fine. So, Can I flash my mobile,s firmware with indian firmware? or is that any option to enable VoLTE?

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