How can I remove the signal lock from my phone? My phone is Verizon S6EdgePlus G928V

I have phone from Verizon, it is S6Edgeplus G928V. I am using it in different country here in Southeast Asia and I want to use the mobile data. I can't use the mobile data because it is on Roaming Status it says. I think it is signal locked. How can I remove this and be able to use mobile data in my country.

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