Today the first of Samsung's new Galaxy Note7 smartphones (50,000, according to the manufacturer) have arrived in retail outlets as part of a recall program offer announced by the phone maker and the Consumer Product Safety Commission on Sept. 15. The recall, which affects 1 million phones in the U.S., was issued because of widely reported instances of Note7 smartphones overheating and even exploding because of a battery problem confirmed by Samsung.

But according to the CPSC, not all Galaxy Note7 phones are affected. In that regard, Samsung has just issued a software update, pushed out via cell providers, that will let Note7 owners know whether or not they have a phone with an “affected” battery.

If the phone is not among the recalled models, the battery icon on the status bar found on the top right hand of the screen will change its color to green.

If the Note7 has one of the defective batteries, phone owners will be prompted with a safety notice urging them to power down and exchange their recalled device. The notice will appear every time they power up or charge their device.

You can also determine whether your Note7 needs to be exchanged by locating the unique International Mobile Equipment Identity (IMEI) number on the back of the phone or packaging, and either calling Samsung or entering the number into an online tool at the company's website.

And, finally, here's what you can do if your Note7 has been recalled:

1. Exchange your current Galaxy Note7 for a new one.
2. Exchange your current Note7 for a Galaxy S7 or Galaxy S7 edge and restitution for any Note7-specific accessories.
3. Contact your point of purchase to obtain a refund.