Lumia 925: Not able to find Global Mode selection, where could they be?

[Windows Central Question]

Lumia 925: Not able to find Global Mode selection

I am using Lumia 925 and I have Vodafone India sim card. Currently, I am in US and I am trying to use my Vodafone India sim card. It was working till last month but suddenly it stopped showing any network. I contacted the Vodafone and they said there is no issue with my account/balance. They suggested to change my SIM option to Global Mode or allow international roaming. But, I am not able to fine any such settings in my SIM Application or anywhere else. Please guide.