SMS-enabling the applications
Every application currently strives to provide worldclass features for its users. The most common trend amongst all applications is to provide up-to-date data and access to users who are on the move. Towards achieving this mission, the most common strategy is to make use of Text messaging, commonly known as SMS (Short Messaging Service).
SMS enabling the applications involving a subscription plan from the local cellular operator who service SMS requests. Fortunately there are also third-party service providers who provide cost-effective SMS services (API) for the applications. I have compiled a few of URLs for the benefit of readers: