Tutanota, 
Telegram leaks your IP address to anyone in your contacts during a call. And a researcher has created a tool to easily exploit this.
#Telegram says this is expected behavior, so there's nothing to fix or change.
That's why our top WhatsApp alternatives are #Signal and #Threema: https://tuta.com/blog/best-whatsapp-alternatives-privacy
More on this story: https://techcrunch.com/2023/10/19/telegram-is-still-leaking-user-ip-addresses-to-contacts/
