At times where you have no internet access at your home or workplace, after typhoon, when landline wasn't paid, and especially at remote areas where waves have a hard time reaching their towers, it is important to have a way to send BTC. Let's admit that though many of us are familiar with how it works, some are still crossing the gap between stable and readily-available internet connection. SMS/text messaging might be a good way but it has disadvantages. Sender might have the error to replace the number of his/her receiver. Also, these text messages can be controlled by the service provider or a third party.
If you are not yet informed, high-frequency radios are now used to send BTC. It doesn't require internet to broadcast their transaction and thus, using a certain application or frequency, Bitcoin can now be sent. I suggest you try this.
I'm aware that Bitcoin can sent through radio waves, but not everyone will be able to afford the necessary tools or equipment to perform this task. This applies especially to third-world countries where most people are poor with little-to-no-access to technology. A featurephone or basic phone is more accessible as they come in cheap for everyone to use. Maybe in the future, a cellular network company like T-Mobile, AT&T or even Verizon will be able to provide crypto services to their customers using SMS/Text messaging? If people will be able to send/receive Bitcoin through this method in a safe and secure way, the barriers or limitations of a limited budget or lack of Internet access with be a thing of the past.
In my case, I'd prefer to use radio waves for sending/receiving Bitcoin than SMS/Text messaging because it's much more secure. But it'll be a difficult task sending Bitcoin to a person in a third-world country using radio waves because of the aforementioned reasons. Still though, it's a great alternative to the Internet that could further decentralize the pioneer cryptocurrency. We now have satellites, mesh networks, and radio waves for sending/receiving Bitcoin without the need for an Internet connection. But adding SMS/Text messaging in a decentralized manner could be ideal for increasing the widespread usage of Bitcoin in the mainstream world.
So far, sending raw transactions through SMS/Text messaging seems to be the safest (and most affordable way) to send Bitcoin to anyone in the world. The only downside is that the receiver would need to have an Internet connection to broadcast the BTC transaction to the Blockchain. I hope that sometime in the future, developers would find a way to send/receive Bitcoin safely through SMS/Text messaging without requiring an Internet connection on both ends (sender/receiver) in a completely decentralized manner. Just my opinion