Project Loon, part of Google's parent company, Alphabet, on Wednesday announced that it has signed agreements with three mobile network operators in Indonesia -- Indosat, Telkomse, and XL Axiata -- to begin tests of its balloon-powered Internet service in 2016. Only about one in three of Indonesia's 250 million residents is connected to the Internet. Project Loon will transmit signals from areas connected to an Internet ground station across several balloons in the stratosphere and back down to areas without access.