Vodafone India — No network in vodafone sim card in USA

Dear Team,

I have a vodafone Maharashtra sim card with number : [protected]
Last year I have travelled to USA and now I need to go back to India due to personal reason. When I came to USA that time I was getting signal/network coverage in my vodafone but recently I checked again and didn't get any coverage. Please suggest me what to do. I will be needing this number once I landed in India. Please note that I have not done any international roaming packs before travelling to USA.