Giftgaff is the place where the sharing economy meets the sim card! Everyone can be a giver or an explorer.
When you receive a sim card that you want to give away, you are a giver. Select the location to place your sim card and claim your gift after an explorer checks in.
When you need more mobile data, you are an explorer. Set your location by either pressing the button or by searching a city or country. You will then receive locations of sim cards near you. Select the one that you want to claim. You will see the distance between your current location and the sim card you selected.