Why isn't an SMS sent in WhatsApp even though there is internet - briefly?
WhatsApp relies on an active internet connection to send and receive messages. When the internet is unavailable, SMS cannot be used as a fallback because WhatsApp does not support traditional SMS functionality.
Why isn't an SMS sent in WhatsApp even though there is internet - in detail?
The inability to send an SMS via WhatsApp, despite having an active internet connection, can be attributed to several factors stemming from the design and functionality of both WhatsApp and traditional SMS systems.
Firstly, it is essential to understand that WhatsApp operates on a completely different protocol than SMS. WhatsApp uses the Internet Protocol (IP) for data transfer, which requires an active internet connection. In contrast, SMS functions on the Short Message Service Center (SMSC), a component of mobile networks designed to handle text messages. This disparity in protocols means that even with an internet connection, WhatsApp cannot directly interface with the SMSC to send traditional SMS messages.
Additionally, WhatsApp's core functionality is centered around instant messaging using data services, not SMS. The platform leverages end-to-end encryption and various multimedia features that are not supported by the basic text message capabilities of SMS. Integrating SMS functionality into WhatsApp would require significant changes to both the application's infrastructure and the underlying protocols, which could compromise the security and efficiency for which WhatsApp is known.
Moreover, the business model of WhatsApp relies on providing a free or low-cost alternative to traditional SMS services by using data networks instead of mobile network operators. Allowing users to send SMS via WhatsApp could disrupt this model, as it would involve additional costs associated with SMS delivery, which are typically borne by the user's mobile carrier. This shift could undermine the financial sustainability of WhatsApp's service.
Lastly, the integration of SMS capabilities into WhatsApp would introduce complexities related to message delivery and receipt confirmation. Unlike data-based messaging, which provides real-time feedback on message status (delivered, read), SMS delivery is less reliable and does not offer the same level of certainty. This discrepancy could lead to user confusion and dissatisfaction if messages fail to deliver or if delivery confirmations are delayed.
In summary, the inability to send an SMS via WhatsApp, even with an internet connection, is a result of fundamental differences in protocols, core functionalities, business models, and message delivery mechanisms between WhatsApp and traditional SMS services.