The key point here is ‘broken cellphone’. You wouldn not dismantle a functioning cellphone, as a working cellphone is a lifesaving device in itself….
Apart from the obvious means of communication, today’s smartphone come with GPS built in, plus there are countless other survival and lifesaving apps you can install. For example, I have an SAS survival app, a first aid app, a digital compass app, and a flashlight app. All of which could prove vital in a survival situation.