A Brigada reader is asking for input.  In a few weeks, he will be traveling into a hostile, closed country and is hoping to take a phone that could not be traced back to him or his contacts.  Yet, he needs to have WhatsApp, Signal, and a few key contacts.  He hopes to take pictures in the country and communicate with key people both within and outside of the country.  Can anyone help him out?  What would you recommend?  Thank you for your input for our fellow brother!