"This means in two to five years we may be able to surf the internet or talk on our 900 MHz phones while walking down the sidewalk in nearly any city whose occupants own Amazon or other competing devices."
We may Soon have City-Spanning 900 HMz Mesh Networks
"These all use some form of local radio signal. Some, such as Briar, may use short-range Bluetooth and Wifi, while others use radios such as LoRa that can reach several miles with low power. ... Every item on this list uses full end-to-end encryption" #offline #messenger #lora #meshnetwork
Roundup of Secure Messengers with Off-The-Grid Capabilities