So I had an interesting type of internship at AXA Advisors. I was hired directly by a financial advisor and served has his personal intern. I was doing a lot of cold calling for new business as well as scheduling appointments for existing clients and a lot of back-end administrative work. i.e. not the sexiest internship. I would say keys to success there were persistence, and strong interpersonal skills (so people don't immediately hang up on you). I was a great introduction to sales careers!
There are a few things that helps with success at AXA. The first is organization. You will need to be organized to make sure you call back prospective clients on time and in a timely fashion. Related to this is persistence. You will need to find a balance between respecting the prospective client and persisting enough to keep calling or checking in with them; even when they say no to any sales meeting. Remember, ultimately this is a sales job. You will need to sell financial products. It is very helpful if you have a wealthy natural market (friends and family). This allows you to make sales early and often and ideally gives you a large network to work with as your friends and family are likely to refer you around. It is difficult either way, but it makes it easier to have easy sales while you are learning the products.