It enables web services to send and receive SMS and MMS messages by forwarding incoming messages to a server on the Internet, and sending outgoing messages to other phones.
People with any type of mobile phone can send SMS and MMS to a phone running KalSMS, without needing their own Android phone.
It works wherever the phone can receive SMS messages and access the Internet (via Wi-Fi or mobile data connection).
KalSMS can be used nearly anywhere in the world. In particular, it is useful in countries where obtaining a local virtual phone number or SMS shortcode is difficult, expensive, or impossible. A phone running KalSMS connects to the phone network in the same way as any other mobile phone, so it can be set up without needing approval from anyone else.
KalSMS is designed to to be maintainable even when deployed in remote locations that cannot easily be accessed by your organization's technical staff. KalSMS is simple enough for non-technical users to do all setup and maintenance of deployed phones.
KalSMS is free to install on as many phones as you'd like.
In order to deploy KalSMS, you will need a messaging plan for your phone, and the phone itself. KalSMS is compatible with many old or inexpensive Android phones, e.g. the LG GT540, currently $120 on Amazon.com.
Typically your organization will need only one phone running KalSMS in a particular country. However, it is possible to use multiple phones to load-balance requests for higher throughput, to offer different user services, or to serve different mobile networks.
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