2 ms·All of them.by contravariant 5y agoAll of them.Terretta 5y agoThen leave the phone at home. Because knowing which cell a cellular phone is in, is how it works: https://en.wikipedia.org/wiki/Mobile_phone_tracking https://en.wikipedia.org/wiki/Mobile_phone_trackingpoo-yie 5y agoOr use a case that functions as a Faraday cage.