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Let's say two persons would like to share files with each other without knowing each other's emails, using messengers or social networks, but they do know each other's phone numbers.
First thing that comes to mind is to upload it to One Drive or Google Drive and send the link via SMS-message, so that the other person would type it in the address bar. But links are complicated and long.
Files have to be downloaded using PC's Internet, not phone's.
You can use YellKey to generate a short-lived human-friendly alias to the sharing link. YellKeys use real English words, so they are harder to get wrong than randomly generated IDs. YellKeys live up to 24 hours.
Alternatively, you can use some method to send the SMS using your computer. Google has a service for this for Android users. It lets you read and write messages on your phone using a computer. There are also 3rd party alternatives such as Pushbullet. This method isn't time-limited, but both sides have to use it: first to send the link, then to open it on a computer.
