KnowRoaming Offers Free WhatsApp Use Around the World
So long as you use one of its products.

KnowRoaming's SIM card and sticker were designed to help frequent travelers save money by connecting to local networks. This latest feature stays true to that mission. You'll now be able to use WhatsApp for free around the world (the service works in 142 countries) if you use any of the company's products. KnowRoaming swears there's no catch -- you're not required to buy credit to be able to use the feature, and sending messages isn't the only thing you can do for free. You can make voice or video calls and send images at no charge, as well.

Of course, since you need a KnowRoaming product to be able to take advantage of the offer, you'll still have to spend some money. The company's SIM sticker, which you can slap on top of your regular SIM card, costs $30. Its standalone global SIM card, on the other hand, is much cheaper: you can get one for $10 and use it with any unlocked phone or tablet.