ios4 - iPhone simulator - simulate 3G connection

Question

I am testing the Reachability api, but my physical device only has WiFi access, as I don't have a phone contract. My code needs to distinguish between being connected to 3G/2G or WiFi. Is it possible to simulate a 3G connection on the iPhone simulator?

Clarifications: I am using Snow Leopard. Limiting the bandwidth is not what I need. I need for the actual interface to be identified as the 3G or 2G radio, as opposed to WiFi.

Answer 1

If you are using Lion try the Network Link Conditioner

Nowdays there is a part in Preferences on the device (when registered as a developer device) where a "Network Link Conditioner" is available.