I am in the US with an approved COS from B2 to F1, so my F1 visa is yet to be stamped on my (Indian)Passport.
1. My STEM masters program is for 9 months, and my I20 has a start and end date of 2 years(2026). Do I have to stamp before the end of 2 years to avail myself of the OPT and STEM validity?
2.I might have to visit a family member in Canada sometime in mid-2025 after my master's program has started. Is it advisable to go to Canada since I do not have the F1 stamped on my Visa? If I can visit, then will I require a different visa?
3. Is it possible for me to schedule my F1 Visa stamping in Canada during the visit? Or would you advise something different here? Or is it better to get it stamped in Mexico?
If you are on an F-1 visa converted from B-2, your visa stamp is only necessary if you plan to travel outside the U.S. While in the U.S., your status is governed by your I-94, which typically says "DS" (duration of status) and remains valid as long as you maintain your student status.
If traveling briefly to Canada or Mexico for under 30 days, you can use Automatic Visa Revalidation (AVR) to return without a visa stamp, provided you haven’t applied for and been refused a visa during your visit. Scheduling visa stamping in Canada is risky—if denied, you lose AVR eligibility and must return to India to reapply.