When an Android machine signifies a message was despatched as SMS by means of a server, it signifies that the textual content message didn’t originate immediately from the machine’s SIM card utilizing the usual mobile community. As a substitute, the message was routed by means of an middleman server earlier than being delivered to the recipient. This course of includes using an web connection to transmit the message knowledge to a delegated server, which then forwards it as a typical SMS to the supposed telephone quantity. A standard instance is the performance offered by sure messaging apps that provide SMS capabilities alongside their internet-based messaging options.
The utilization of a server to relay SMS messages affords a number of benefits. It may allow message supply even when the sender’s machine has restricted or no mobile sign, so long as there may be an lively web connection (Wi-Fi or cell knowledge). This methodology may cut back prices, notably 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 methodology has been essential in areas with unreliable mobile infrastructure or the place community suppliers cost extreme SMS charges.