The Dogecoin core development team was able to make a Doge payment via radio waves. This improvement was made to make it easier to send payments to regions where there is no traditional financial infrastructure. Starlink internet connection was used to transfer DOGEs from the radio network to the Doge main network. So the process could not be completed without an internet connection.
Project Libdogecoin
Dogecoin developers said they expect more people to transfer crypto via radio waves in the future. However, the global chip shortage is currently preventing this situation. This experiment is one of Dogecoin's important steps towards becoming the public's cryptocurrency.