If using instant yeast, mix flour, yeast, sugar, cinnamon and warm water together until well combined. If using dry active yeast, you need to let the yeast activate. Mix warm water, sugar and dry active yeast together and let the yeast activate for about 5 minutes. It will be ready to use when you see the mixture increase in size and bubbles have formed. Then add this mixture to the flour and cinnamon and combine well.
Cover the bowl with a damp kitchen cloth and let it sit to proof for about an hour. The dough will double in size and have a sweet smell.
Preheat the oil in a deep frying pan and scoop a spoonful of dough then drop it into the oil.
Fry the balls until golden brown as you turn them so as to cook evenly.
Remove from heat. Drain the balls on paper towels and enjoy hot.