By Julie Landry Laviolette
Special to the Miami Herald
In 2010, when he was a high school junior, Chad Kalecky wanted to make a little extra money. The 16-year-old, always a tinkerer, started repairing his friends’ smartphones. But the teen saw a bigger business opportunity. While still a student at American Heritage School in Plantation, he started buying used smartphones online, repairing them and reselling them.
When Chad went off to the University of Miami, he talked his dad, Dan Kalecky, into opening a 3,000-square-foot smartphone store in Fort Lauderdale. They opened in 2011, with Dan