One feature that the Galaxy S6 is missing from its predecessors is a microSD card slot, which allows you to expand upon the phone’s built-in storage. Samsung’s pretty generous with the internal storage on its new flagship device, but more is always better, which is why T-Mobile’s upcoming promotion is attractive.

From June 24 through June 27, T-Mobile will be offering a free memory upgrade on Galaxy S6 and Galaxy S6 edge purchases. What that means is that you’ll be able to get a 64GB GS6 or GS6 edge for the price of a 32GB model — a savings of $80 — or a 128GB GS6 or GS6 edge for the price of a 64GB version. It’s worth noting that the 64GB phone is available with $0 down, but the 128GB model requires a $99 down payment.

While cloud storage is always an option, sometimes you want local storage for your media, like when you’re going to be somewhere with a weak or non-existent wireless connection. T-Mobile’s upcoming promo will double the storage of your new Galaxy S6 for no extra charge, so if you’ve been thinking about pulling the trigger on Samsung’s new flagship, this may be a deal worth taking advantage of.