INTERNATIONAL NEWS - Samsung's second recall of its Galaxy Note 7 handsets is an unprecedented disaster for the company and the wider mobile phone sector.
There have been huge battery-related recalls before - Nokia had to ask consumers to send back 46 million batteries in 2007 because of overheating fears, but because they were removable it did not mean a well-reviewed flagship had to be scrapped.
"Stop using your device, back up your data and switch it off," the Samsung told Note 7 owners the day after it confirmed it had shut down its assembly lines following a spate of fires.
But several questions remain unanswered.
When Samsung instituted the initial recall last month, it pointed to a "battery cell issue" being the cause.
A report sent by the company to regulators was more specific, saying a production fault had caused some of the batteries to be slightly larger than intended, which had put pressure on them when they were fitted inside phones, according to a leak reported by Bloomberg.
The issue was blamed on the components' manufacturer - Samsung SDI - and was supposed to have been fixed by putting batteries made by another company, ATL, in the replacements.
Now that several of that second batch of phones have overheated too, it is unclear whether the original problem was misdiagnosed.
According to the New York Times, Samsung's engineers were never able to get the phones to explode when they tried to recreate the fault.
"We are working with relevant regulatory bodies to investigate the recently reported cases involving the Galaxy Note 7," was the only comment a Samsung spokesman was willing to make on the matter.
Some reviews had described the Note 7 as being the best Android handset to date.
Samsung has yet to reveal exactly how many Note 7s it made before pulling the plug on Tuesday.
On 2 September, the South Korean company said 2.5 million devices were subject to its initial recall.
On 27 September, it added that more than 60% of the Note 7s that had been sold in South Korea and the US had been replaced with new devices.
Those two countries accounted for the vast majority of the phones sold - only about 50,000 devices made it to Europe.
And the Note 7 only briefly returned to sale to new customers in South Korea last week.
All of which gives a rough tally of four million units.
IHS had originally forecast Samsung would have made about six million Note 7s by this point if all had gone according to plan.
Samsung said it had received "35 reported claims" at the time of the first recall, and there were seven reports in the media of replacement models being affected.
Samsung has said it will take "all measures" to get the devices back.
For now, that involves sending emails and notifications to registered users.
At the time of the original recall, it also issued a software update that prevented some of the batteries from being fully recharged.
There is speculation that other restrictions - or a full lockout - could be imposed if users now refuse to give the devices up.
There is also the question of what Samsung does with the mountain of returned mobiles.
But one environmental pressure group urged it act responsibly.
