I am Avani from Pune. I have been accepted as a PhD student at Iowa State University. I gave my F1 student Visa interview on 7th June 2016. I was handed the green 221g form. I mailed the required documents on 10th June. My Visa was approved on 29th June and was ready to be collected on 7th July. The Visa expiry date is 4th July 2020 whereas the tentative course completion date on my I20 is 7th August 2021. What do I do in this case? Everyone I know has been given Visa for 5 years at least, even MS students with coursework of 2 years. Will I have to get my Visa renewed during the course of my PhD?