How do I get around my school`s phone policy?

At my school my principal made this no cellphone rule and the security guards take our phones at the door and give them back at the end of the day. This rule is only at my school but the school district`s policy is that we have to keep our phones put away (in our pockets) and if we get caught with it out then they... show more At my school my principal made this no cellphone rule and the security guards take our phones at the door and give them back at the end of the day. This rule is only at my school but the school district`s policy is that we have to keep our phones put away (in our pockets) and if we get caught with it out then they can take it. I`ve been sneaking my phone in but I recently got caught in the scanner (like at the airport) and I can`t sneak anymore.About a week ago we had a gun threat at our school and we got placed on lock-down, I texted my mom and had her call my school and when she did they told her "It`s just a drill, everything`s fine." when it was real and they said this before we found out the threat was false.My mom got upset because she wouldn`t have known that I was ok or what was happening inside the school if I couldn`t text her. Now she`s telling me to bring my phone in anyways since my school kept lying to her but if I do I`ll get suspended from school. I just need to know how can I get around this so I can at bring my phone to class even if I have to give it to every teacher and receive it during emergencies or at the end of each class.

District policy: http://www5.milwaukee.k12.wi.us/school/morsemarshall/parents/cell-phone-or-any-electronic-device-possession-policy/

School threat: https://www.google.com/search?q=pulaski%20high%20school%20threat&rlz=1CAACAM_enUS759US759&oq=pula&aqs=chrome.0.69i59l2j69i57.2503j0j7&sourceid=chrome&ie=UTF-8&safe=active&ssui=on
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