In many countries around the world, there are drums and town criers to wake you up before morning prayer and before the morning feasts begin. However, that's not the case everywhere. Some people have to rely on alarm clocks and phone alarms, which means that some people wake up late during Ramadan. Of course, there are no exceptions to Ramadan traditions, and this means that they have to go without.
If someone sleeps in too late and misses morning prayer and suhoor, they have to fast for the rest of the day on no food. By the time the sun sets, they are ravenous and ready for Iftar.