However I read many reactions : “don’t take your phone with you” This is a common issue in a lot of activist place to don’t ask ourselves why people are acting like this ? before telling them to stop. They may have good reasons, and in a case of protests, there is.
Filming the cops : I don’t know in the US, but in a lot of countries, cops are less violent when they know someone is filming them. This may help people harmed by the police, in giving them evidence, or helping mobilization in the futur. After mass arrestation, it could be hard to know how as been arrested or not; some legal support hotline ask this kind of evidence for this reasons. Of course this some sensitive material, and need to be secured too. For example, the cops may target you if you are filming them.
Calling the legal support hotline : Some of them ask to be called just after arrestation or cops actions, to make a precise report. You could call them when someone you know have been attacked or kidnapped by the police.
Call medial support : I don’t know how the emergency number is linked with the repressive force in the US, but in a lot of country, it’s not. Even if it’s rare, it could be a vital issue.
All this actions are important and individuals should compare the risks they take in taking them and what we lost in not acting like that. Of course this risks have to be documented; with flyers at the start of a protests for example.
I would recommend to mutualise actions to decentralize risks. Make a team with one or two people with burned phone and dedicated camera (paid by everyone); let your other phones at home. Stay (at least) by pair, and keep in eye someone with a phone.
They may be better plan of actions, but we couldn’t just let down cop watch ant street medic just for the illusion of individual safety. Such thing simply do not exist