A USB Data Blocker is a low-tech and low-cost way to protect the information on your mobile phone when you need to plug it into an untrusted port.
(Unless you own it, consider the port untrusted.)
#Search on https://www.duckduckgo.com for "USB Data Blocker" or "PortaPow" to see the manufacturer of this particular model.
Get one with a carrying case and a strap so that you are never without it. As a bonus, the device can actually help speed up charging.
@theprivacyfoundation For those in/near the UK: https://maltronics.com/products/usb-protector
