If you were planning to buy a Galaxy Note 7, you might not want to count on getting it quickly. Samsung tells Reuters that it's delaying shipments of its latest smartphone as it conducts "additional tests" to verify "product quality." It's not saying what it's worried about, but there have been reports of the phone's battery exploding while it charges. Samsung might be checking to see whether or not the battery fires are the result of systemic flaws, or just a handful of isolated incidents.