Samsung has confirmed today that the Galaxy Note 7 shipments have been delayed as it’s conducting further quality testing on its new flagship smartphone. The company said in a statement that “Shipments of the Galaxy Note 7 are being delayed due to additional tests being conducted for product quality.” It did not provide any details on the tests being conducted and the markets that will be affected by this delay.

There have been some reports recently of the Galaxy Note 7 exploding while it was being charged, the reports primarily came from South Korea and some other markets. Samsung has not confirmed whether this is the cause of the shipment delay and subsequent additional testing. There have also been reports of some Galaxy Note 7 units crashing and getting stuck in boot loops for no apparent reason. If the quality control problems are confirmed and Samsung has to take steps to rectify them it will deal a significant blow to the company as it’s counting on the Galaxy Note 7’s sales to continue the stellar performance of its mobile business in the second quarter aided by the Galaxy S7 and the Galaxy S7 edge. There are pre-order customers in several markets who are still waiting to receive their units and delayed shipments will have a direct impact on sales.