A key risk is the IMSI catcher, also known as a cell-site simulator, fake cell tower, StingRay or dirtbox. It’s been reported that sophisticated nation-state actors like Russia and China are highly skilled in using such RF-based techniques, allegedly targeting travelers when passing through airports and other chokepoints. On the Wi-Fi front, a key risk to be aware of is a Karma attack delivered by a rogue access point. In Bluetooth, hackers have been known to use directional antennas to communicate over greater distances.
Source: https://www.helpnetsecurity.com/2021/07/19/smartphone-radio-based-attacks/