The US National Security Agency published guidance on how to properly secure wireless devices when traveling or working remotely. The advice is designed to help National Security System (NSS), Department of Defense (DoD), and Defense Industrial Base (DIB) teleworkers. The NSA recommends avoiding public Wi-Fi networks as they expose traffic data to theft or manipulation. The info sheet also advises disabling Bluetooth and NFC radios while in public and not in use to avoid exposing info that can be used to hack the device.
Source: https://www.bleepingcomputer.com/news/security/nsa-shares-guidance-on-how-to-secure-your-wireless-devices/