 From VOA Learning English, this is technology. 23-year-old Rio Safianto sells face masks for about 30 cents each in Central Jakarta, Indonesia. He earns enough money to own a cell phone that permits him to visit websites like Facebook and Twitter, as well as finding game applications, or apps. Rio Safianto says the average person in Indonesia has a cell phone. He likes having one because he can talk to his family when he is away from home. And he is pleased that he can use it to listen to music. Rio's phone has a keypad that makes it look like a blackberry. It is known as a feature phone or smartphone light. That is because it is less costly and cannot do as many things as more advanced phones like the Apple iPhone. These devices make up the majority of cell phones sold around the world. They are successful in places like Indonesia, where some smartphones cost $700 or more. Although many lower-income users are new to smartphones, they are quickly learning to use the technology. Building manufacturer Nokia offers a service called LifeTools. For a monthly payment, Nokia sends text messages to farmers. They tell about weather conditions, crop prices, agricultural news, and give advice. New businessman Aldi Hyrio Protomo has developed a way for store owners to sell things from prepaid cell phone minutes to life insurance through text messages. A company called Ruma developed the technology. It is working on a system that will inform people about jobs in their area. Last year, the French company Semiocast reported that Jakarta was the world's top tweeting city ahead of Tokyo and London. For VOA Learning English, I'm Carolyn Presuty.