How to sneak an iphone past a metal detector?

Anonymous
I'm transferring schools this year and the school I'm going to doesn't allow cell phones. They have a metal detector at the front door. What can I do to keep them from finding my phone. I was thinking of hollowing out my old calculator and putting it inside or carrying a metal lunch box and hide ot inside (Hide it in plain sight sort of). Don't tell me not to take my phone to school. I need it! I have to take a bus and the train by myself to get to school and it's not safe to not have a phone.
Updates
+1 y
I just googled the school's handbook. They have an x-ray too look in our bags. Would the calculator still work?
How to sneak an iphone past a metal detector?
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