On the day of your appointment

• On the day of your appointment take a cab at the hotel and ask for American Consulate (Consulado Americano) which is around 10 minutes drive and you will be charged approximately $7 USD.
• Once you reach the consulate, you will be checked for the correctness and completeness of your documents while standing in the line outside.
• After your documents are checked, you will be allowed to enter inside where you will have a basic security check. They will not allow remote car keys, combs, cell phones, any electronics, flash drives, any food/drink, any sharp objects, chap sticks etc. There is a store nearby who can save them for you. You can just give them a $1 and a Muchas Gracias (Thank you very much).
• Next, you will be directed to a counter, where you will need to submit your I-797, DS-156, DS-157 and DS-158 forms, Banamex DD, passport and you will be given a token number.
• When you token number is displayed on the screen, it will also display the counter number you need to visit (just like in DMV).
• At the counter, your info will be entered into the database; finger printing and picture will be taken.
• Again, you will be asked to sit in front of the counters to be called by the consular officer.
  This time, the same token number will be used to call you for the interview by the consular officer.
• Once your token is displayed on the screen, you will have to visit the displayed counter for your visa interview.If you are issued a visa on the same day, you will need to pick your visa in the noon at around 3 PM else you need to check with them on when your visa will be given.