I tried that the other day. 45 min on hold then they told me I couldn't revise the trade online after it was placed. I thought I would be able to do that if I wanted to change the quantity or the price if it started moving. Also, I needed to sell another security first in order to make sure I could buy enough to make it worth it. If that makes sense.
In summary, I couldn't place an order for FRGY on the phone and then change it online when I sold my other position the next day. Add insult to injury, the guy was just starting to tell my how dangerous it was to invest in this penny stock and I lost my phone signal at the 45:06 minute mark. A very pleasant experience. I didn't have 45 minutes the next day to try to get the penny lecture from him again and I haven't had time to call it in since then. Work, etc.