When an Android system signifies a message was despatched as SMS by means of a server, it signifies that the textual content message didn’t originate instantly from the system’s SIM card utilizing the usual mobile community. As an alternative, the message was routed by means of an middleman server earlier than being delivered to the recipient. This course of entails using an web connection to transmit the message knowledge to a delegated server, which then forwards it as a regular SMS to the meant cellphone quantity. A standard instance is the performance supplied by sure messaging apps that provide SMS capabilities alongside their internet-based messaging options.
The utilization of a server to relay SMS messages presents a number of benefits. It could actually allow message supply even when the sender’s system has restricted or no mobile sign, so long as there’s an lively web connection (Wi-Fi or cell knowledge). This technique may cut back prices, significantly when worldwide SMS charges are excessive, because the app supplier could have agreements that permit for cheaper SMS transmission. Moreover, it permits for options like message logging, analytics, and doubtlessly enhanced safety protocols, that are harder to implement with conventional SMS. Traditionally, this technique has been essential in areas with unreliable mobile infrastructure or the place community suppliers cost extreme SMS charges.