If WhatsApp is blocked, do SMS messages arrive - briefly?
If WhatsApp is blocked, SMS messages typically still arrive. This is because SMS operates on a different network protocol than WhatsApp.
If WhatsApp is blocked, do SMS messages arrive - in detail?
If WhatsApp is blocked, the delivery of SMS messages remains unaffected. This scenario arises when governments or network providers restrict access to certain applications, particularly in cases of civil unrest, security threats, or compliance with legal requirements. However, the blocking mechanisms typically target specific data packets associated with the application, rather than the entire communication infrastructure.
SMS (Short Message Service) operates on a different protocol and frequency band than WhatsApp's internet-based messaging system. While WhatsApp relies on the internet to send encrypted messages via data packets, SMS uses the Signaling System No. 7 (SS7) network, which is part of the Global System for Mobile Communications (GSM). This distinction allows SMS messages to bypass the blockades imposed on WhatsApp and other internet-based communication services.
Moreover, blocking WhatsApp usually involves filtering specific internet protocols or IP addresses associated with the application's servers. Since SMS does not depend on these internet pathways, it is not subject to the same filtering mechanisms. This ensures that SMS messages continue to be delivered even when WhatsApp and similar services are inaccessible.
In summary, if WhatsApp is blocked, SMS messages will still arrive due to the fundamental differences in their operational protocols and network infrastructure.