British troops banned from WhatsApp amid Russian airstrike hacking fears in Ukraine

All British Army personnel, including senior officers, will now face disciplinary action if they're caught using WhatsApp over fears that Russia is using phone data to choose airstrike targets.

https://www.dailystar.co.uk/tech/news/british-troops-banned-whatsapp-amid-26518611

If possible never use your mobile phone number as your WhatsApp number specially if you are military and can become a target.

You would think the UK military would have known this risk. Just shows how incompetent military, governments, and institutions around the world are.