Can a thief get past my pass code on my iphone?

Can a thief get past my pass code on my iphone?

Added (1). my phone got stolen and I was just wondering of what all things the person who took it could do to it?

If they have itunes installed on their computer, they can turn the passcode off of your phone. But by doing so, they factory reset your phone. So basically, all of the stuff that was on your phone will be wiped off the phone and they won't be able to get any information. Just make sure your cellphone company knows that your cellphone got stolen - that way they can replace the line.

Just use find my iphone and put it in lost mode, you can also wipe it remotely. If using fingerprint, its built into the phones on iphones and no way they will get past that anyways.