Once the remote kill switch is activated, the user will need to enter the owner's Apple ID and password, even if the SIM card is removed or replaced.

2.8 Million Reasons Why Smartphones Need To Come With Kill Switches

Earlier this week, Apple made a lot of customers happy when they announced that the next iteration of its iOS operating system for iPhones would integrate a so-called “kill swtich” technology that enables the owner to cripple the phone remotely when it’s lost or stolen. And that’s a good thing, because a lot of you are being careless with your wireless devices. [More]