Don't do that. We have a sim card, even though metro claims it isn't, but people have messed up shit removing it, so don't. Fdbryant3 is very much right here.
The first rule of playing with cellphones is don't do something you don't know the result of unless A) you fully comprehend what could go wrong and don't care, and B) you can fix it anyway.
And if you do eff up your phone for the love of god, don't say you removed the sim card.