Default please help me

Hi… i purchased galaxy note 3 from saudi arabia as you do.I used the saudi sim in my note 3 and it was working fine…Now i am in india
I have rooted and tried with region lock away app but still Im getting Invalid SIM card, Network Locked SIM card inserted.
Please help me how can I unlock the same? can i flash inu firmware odin then sim unlock problem sloved?
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