There may be a few reasons, likely you have not loaded your product information into the App/Store/POS/Website/Database that the scanner is connected to. More on how to do this here: (How To Register a GTIN) It is also important to understand that a barcode "scanning" app on your smartphone is not a real barcode scanner, it is at best a helpful tool for consumers, not a marketing tool for vendors/manufacturers. Until you manually input your product data into a specific P.O.S. system/Database or pay Google to advertise it, it will likely come up "no data found".