Should movie theaters make phone-free screenings the default?

My phone is a medical device. My continuous glucose monitor sends low-blood-sugar alerts to it, and during a two-hour movie those alerts are the difference between a good night and a medical emergency. Other people rely on phones for captioning apps and assistive listening in theaters whose built-in devices are broken, filthy, or simply missing. A default pouch policy forces disabled and chronically ill customers to out themselves at the door and beg for an exception, every single time. Inclusion should not require a permission slip. Keep phone-free as an option for those who want it, but the default has to assume some of us need our screens to participate safely. Regulators take the alert function seriously: NICE's technology guidance on Dexcom describes urgent-low alerts that cannot be deactivated, because for some users the phone alert is the safety device.