Signal - @solitude.99
Second option
North of Ukraine*
Epic
Well, as far as I know, the army has its own methods of communication, of course, just as a civilian I do not know much about it.
Ukraine’s army has already been using Signal for communication since 2022, and they were banned from using Telegram. Now this ban has simply been extended to officials. The signal is quite popular in Ukraine because of all this.
Signal
2nd
Also using mullvad dns everywhere.