i would be fine wihtout any smartphone as i dont use apps. only reason would be that you would need linux for a stealth-ping detection which cant be done afaik on old nokia's
stealth ping, beaconing can be disabled on old 63xx,51xx even on chipset level, firmware. with modern chipsets even linux doesn't help you in some cases. for LTE/5g/mimo its even not anymore possible to disable it, signal tracking is too deep in and core for tech to work.