@BillW,
13 Types of phones or long distance (two way) communication tech
1. Google Pixel 8
2. Radio telephone
3. PRC-25
4. military field telephone
5. Morse code
6. Military Auxiliary Radio System (MARS) - a civilian auxiliary consisting primarily of licensed amateur radio operators.
7. Point-To-Point Telephonic Communications System
8. Walkie Talkie
9. Paper cup and string
10. Prayer
11. Zoom conference call.
12. Dead drop or dead letter box - method of espionage tradecraft.
13. CB Radio (modern Citizen's Band radios have immense coverage)