Default Anyone have success getting anything more than Edge on GSM SIM international

I am trying to get more than Edge out of a Tigo SIM in Honduras. 'I'm only here for a month and then back to Verizon. Anyone have any experience with international GSM SIMs ? Disappointed that this is marketed as a global phone and can only get Edge. Thanks for any help.
VZW LG G3
ROM: who knows...changes daily, hourly...whatever

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