Hi! Verizon phones come with GSM unlocked, the icon comes with worldwide GSM , but most likely you will not have 4g, I have a 928 and use in Venezuela without any problem with any of the cellular companies here (I have not been able to prove 4g) You should review your cellular operator bands anyway
2G Network GSM 850 / 900 / 1800 / 1900
CDMA 800 / 1900
3G Network HSDPA 850 / 900 / 1900 / 2100
CDMA2000 1xEV-DO
4G Network LTE 700 MHz Class 13 / 1700 / 2100