In this day and age of openly tracking everyone's movement by government departments I'm surprised anyone brings there cellphone with them when they travel.
Unless you accept creating a forever digital footprint of everyplace you go leave your cellphone at home. We know better but we pretend it doesn't matter because it's easier.
If you don't take your phone everyplace and leave it at home often, you'll probably also end up in some list of suspicion people at some point in the future. Absence of data together with an identity is also a footprint.
Suspicion with lack of data allows you to fill in the details later. Lack of easy to obtain information means you are not low hanging fruit, you require effort and resources.
You run the risk of being in a location at a certain time which you can't dispute.
If you decided to murder someone your cell will identify you. If you decide to leave your cell at home you will look guilty. If you always leave it at home you are good to go.
It's safer to be the ghost in the wires. It's safer to be the bug in the app.
Unless you accept creating a forever digital footprint of everyplace you go leave your cellphone at home. We know better but we pretend it doesn't matter because it's easier.