You need some water. You open the faucet. And you wait. And wait.
You twiddle your thumbs. You wait for the first drop to come out of the tap so you can get water for drinking, cooking and cleaning. You wait for hours so that when the water comes, you're ready.
A lot of the time, nothing comes out.
That's the way water works — or, rather, doesn't work — in many parts of the world.
But in India, a group of young entrepreneurs based in Bangalore have figured out how to let people know when there's water on its way. And it's as simple as sending a text message.