Every country around the world has its own Ramadan traditions, and this is no different in India. In fact, Muslims in New Delhi have been waking up in the same way since the Mughal times - and that's with the help of the "seheriwalas” or "zohridaars." These people have the honor of being a town crier for the locals, and it's their job to wake Muslims up with prayers and the words of the Quran.
The job of this seheriwalas is to wake up the neighborhood before dawn prayer so that they have time to take part in suhoor and eat their morning meal before the sun rises.