Although Samsung maintains a phone repair center in the Dallas suburb of Plano, that facility cannot handle large-scale recycling of lithium-ion batteries. For that, Samsung, which has not responded to requests for comment, probably must tap one of the nation's established recycling pipelines. The US Environmental Protection Agency says Samsung participates in its sustainable materials management program, which requires the company to send devices to certified recycling facilities.

In the US and Canada, Samsung often uses the nonprofit Call2Recycle for small-scale recycling efforts organized through a nationwide network of drop-boxes. Still, Call2Recycle provides a glimpse of what might happen, because it recycles about , devices—more than seven tons in all—each year. Drop-box locations provide bags and tape to insulate battery terminals, as well as instructions for packaging phones safely. For bulk recycling projects, the company uses ground transportation in federally approved containers. Generally speaking, a recycler removes the battery from a phone before breaking the device down to recover precious metals and other materials.

For every one million phones, recyclers can collect 35, pounds of copper, pounds of silver, 75 pounds of gold, and 33 pounds of palladium, according to the EPA. The challenge is getting the battery out, because Samsung, like many manufacturers, glues them down. Removing it requires carefully opening the phone, removing the glass, and prying out the battery—a procedure so fraught that the engineers at iFixit who tore down a Note 7 likened it to brain surgery with a patient that might catch fire.

Smith says the scale of the Note 7 recall presents a unique challenge.

That last point is important. A normal envelope doesn't comply with federal regulations. And you can't leave it in a drop box like Call2Recycle and others use, because you have no way of removing the battery or insulating the terminals. All of which means all of those phones must be boxed and delivered to recyclers via ground transportation.

Samsung's Galaxy Note 7 has been formally recalled twice and pulled from store shelves. Now, the biggest headache may start for Samsung: Recycling more than a million volatile devices. Getty Images. View Comments. Input Device.

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Details SAR Value. Rear-facing camera, front-facing camera, audio player, voice recorder, navigation. Body Color. Platinum gold. Phone Features Phone Functions.

Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert. Accelerometer, proximity sensor, barometer, gyro sensor, hall sensor, RGB sensor, heart rate, geomagnetic sensor. Additional Features. Security Devices.

What it is

Fingerprint reader, eye scan. Miscellaneous Sensors. RGB sensor, accelerometer, barometer, geomagnetic sensor, gyro sensor, hall sensor, heart rate, proximity sensor. Supported Email Protocols. Supported Social Networks and Blogs. Processor Clock Speed. Processor Core Qty. Communications Data Transmission.

Data Transmission Operating Frequency. Wireless Interface. Bluetooth Profiles. Display Technology.

Display Resolution. Color Depth. Display Format. Diagonal Size. Diagonal Size metric. Smartphone Diagonal Size. Color Support. Camera Focus Adjustment.

Camera Light Source. LED light. Supported Digital Audio Standards. Memory Supported Flash Memory Cards.