After an extensive internal investigation, Samsung has released an official statement revealing what caused the massive Galaxy Note 7 malfunction. Samsung tested more than 200,000 devices and 30,0000 batteries during their investigation.

The statement explained there were two separate manufacturing and design flaws in the devices’ batteries. Samsung indicated two of their suppliers were at fault for the flaws, but took responsibility for the fallout.

“Ultimately we take responsibility for this. It’s our product, we set the specifications, and it’s up to us to catch the problem before it leaves in one of our devices,” Samsung senior vice president, said.

Samsung reports 97 percent of Galaxy Note 7 devices have been returned since the device malfunction came to light, costing the company up to $5.3 billion. Moving forward, Samsung is implementing an eight-point battery safety testing protocol to avoid anymore device malfunctions.