KnowRoaming opens preorders for a SIM card sticker that connects travelers to local cell networks. But there is a small catch.

KnowRoaming's innovative SIM card sticker offers some of the best international data rates you can get.

Your starter kit includes a sticker and an applicator, which you use to literally stick KnowRoaming's device directly on top of the SIM that came with your phone.

KnowRoaming's innovative SIM card sticker offers some of the best international data rates you can get.