The new administration is authorizing CBP and even local police to search phones and verify your immigration status. Can you believe that a US born NASA scientist was detained at the border until he unlocked his phone to CBP. As such, it is very imperative to carry a copy of proof of your legal status in the US. If you are an LPR, please carry a copy of your card with you, if you have been granted asylum, please carry the order, if you have a pending case, please ensure that you have your work permit and proof of a receipt of a pending case either with USCIS or the Immigration Court. Also be prepared that your phone could be searched, if you are stopped. It is a new Trump presidency with many rules.