Is it possible to convert from H4 to F1 visa after staying on H4 visa for only 2 months or are there any restrictions for minimum number of months one should stay in US? So, my case is that, I am coming on H4 visa in February 2018 and I am hoping to get an i20 from a school by May 2019. So, after that I am planning to get a F1 visa since H4 visa has restrictions.