With the international debacle that was the Samsung Galaxy Note 7 in its final chapters, people are looking for answers.

Despite two high-profile launch failures, it's not yet clear what was causing the batteries housed inside the device to combust, Digital Spy said.

And while that's currently still the case, the Wall Street Journal reports that Samsung itself was in charge of testing - a contrast to rival Apple and other smartphone giants which use third-party companies to test their batteries.

If true, this places the blame squarely on the shoulders of the South Korean tech giant, Digital Spy said.

As the WSJ indicates: "In order to sell phones in the US, phone manufacturers must test phone batteries in one of 28 certified labs. Samsung is the only phone manufacturer to have its own lab certified by the CTIA, the international industry group, also known as the Wireless Association, in charge of testing."

A Samsung spokesperson also told the outlet that it is 'working around the clock' to identify causes for why some Note 7 devices caught fire and that it was 'premature' to speculate on investigation outcomes.

While this would obviously be a further disaster for the company, it also raises questions about the production of future phones.

Time will tell, with the company likely announcing the cause of the Galaxy Note 7 disaster in the upcoming weeks - a hard one to spin as a one-off considering it slipped by examinations on two occasions, Digital Spy said.