Fall is here, which means plenty of people are starting to think about upgrading their smartphones.

But before that old iPhone gets pushed into a drawer and forgotten, it may be worth finding out what it can still put back in your pocket.

From September 8 through September 30, PayMore is making that decision a little easier with its first-ever iPhone Days.

Customers who sell a qualifying iPhone at participating PayMore locations can get a $10 promotional gift card on top of their payout.

>> Sell your old iPhone here.

Here is everything you need to know about that deal.

A new iPhone can make an older model feel outdated pretty quickly. That does not necessarily mean the old device has lost its value, though.

For many people, it is simply sitting unused while still having enough resale value to be worth selling.

That is especially relevant during fall upgrade season, when more consumers are replacing their smartphones.

PayMore purchased 2,670 iPhones in the U.S. in August, 55% more than during the same month last year. Interestingly, more than one-third of those iPhones were classified as broken.

So even an iPhone with some wear, a chipped screen or other damage may be worth checking.

PayMore accepts qualifying devices in a range of conditions, including used, broken, chipped and flawless phones.

Selling an old iPhone does not have to mean committing to another purchase. That is one of the key differences with PayMore.

Instead of tying the value of your old phone to an upgrade or future bill credits, PayMore gives you cash that you can use however you want.

Put it toward something else, save it for later or simply enjoy having some extra money in your pocket.

And during iPhone Days, there is an additional incentive.

Customers can receive a $10 PayMore promotional gift card for each qualifying iPhone sold at participating locations.

There is no minimum payout requirement and no limit on the number of qualifying iPhones you can sell. The offer is available in-store through September 30, with terms and conditions applying.

That could make this a good time to finally deal with the old iPhones that have been sitting around the house. Instead of taking up space, they could turn into cash.