Does a safelink Sim card work on a jail broken iphone3gs?

I just got a safe link phone and a sim card i did not turn on the phone and only just took out the simcard and placed it into my jail broken Iphone3gs, My iphone just says No Service, and i already removed and installed UltraSn0w twice. Does this mean safelink does not work with iphone? Or am i doing something wrong?

Added (1). 10 points to whoever helps: D

Safelink is the same as tracfone. Tracfone sim cards work only with tracfone phones they were activated in. You cannot use your safelink sim card even with another safelink phone.