If you’ve been thinking about picking up a Galaxy S6 or Galaxy S6 edge, you might want to wait a few days, because T-Mobile has a pretty nice deal on Samsung’s flagship Android phones coming.

From June 24 through June 27, T-Mobile will be offering a free memory upgrade on both the Galaxy S6 and Galaxy S6 edge. Customers will be able to put $0 down and get a 64GB GS6 or GS6 edge for the price of a 32GB model for $0 down, a savings of $80, or put $99 down and get a 128GB GS6 or GS6 edge for the price of a 64GB model, which is a savings of $100.

Unlike past Galaxy S models, the Galaxy S6 and Galaxy S6 edge lack a microSD slot, meaning that you can’t add any local storage beyond what you get out of the box. That’s what makes this T-Mobile deal such a good one, allowing you to get double the storage that you’d normally get for the price.