With about 10 million new iPhone 6s ordered in the initial days on the market, a whole lot of old iPhones are destined for the scrap heap.
Sure, you could sell, donate or recycle your old iPhone, but you probably will not. And there are better things to do with it.
One creative example: At the Missouri University of Science and Technology, a biology class is making old iPhones into microscopes. Using less than US$10 (S$12.68) worth of supplies, the old phones are mounted onto a lens and can magnify an object to 175 times its size.
Even an old phone with a cracked screen can be repurposed, says Josh Smith, editor of GottaBeMobile.com. "You're only really limited by your imagination," Smith says.
Here are 10 smart - and cheap - uses for old iPhones.
Set your old phone on a dock or a stand and use a clock app. With Standard Time (US$3.99), you will have a timepiece unlike any other.
With this app, your clock is a non-stop time lapse video of construction workers switching out pieces of lumber to shape the actual time. "It's mesmerizing," says Shawn Roberts, 47, an Oakland, California, marketing executive.
You can also set up flexible alarms and get the phone to play soothing white noise as you go to sleep. Set it close enough to the bed, and it can be a sleep tracker, too, with an app like SleepBot (free).
MUSIC FOR YOUR CAR
Take your music library on the road. Some cars come equipped with docking ports for iPhones and have dashboard screens so you can navigate your musical options hands-free. Or you can just use the cigarette lighter for power.
Televisions, speakers and other devices now have apps that allow users to make their iPhones into sleek remotes.
Carm Lyman, 42, of Napa, California, converted his iPhone 4 into a remote for his household sound system after his iPhone 5 arrived. Lyman can control the audio levels and activate speakers in various parts of his home as well as access different music services.
Apps can convert an old iPhone that has access to WiFi into a surveillance camera and motion detector. Presence, which is a free app, provides a live stream from the area you want to monitor. You can set it up to record video clips when it detects motion, too.
If you buy a robotic viewing stand for about US$100, you can move the camera 360 degrees rather than stick with a stationary view.