Birdchain simultaneously tackles two very important problems. People have unlimited SMS plans and they do not send SMS anymore; companies drastically overpay for A2P SMS services and there is no alternative for it. Birdchain offers a solution: People will be able to automatically sell their unused SMS to business via Birdchain instant messaging app. Companies will get up to 6 times lower prices and better, faster, and more transparent service. And the people will get paid for every single SMS that will be sold from their phone. A team of Birdchain operates as A2P SMS aggregators for almost 10 years. Using blockchain they are upgrading their service to a whole new level. Birdchain will only facilitate the service of A2P SMS sending. Birdchain not sends messages to contacts of app users or provide their numbers to the third parties.