When an Android gadget 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 gadget’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 includes using an web connection to transmit the message knowledge to a chosen server, which then forwards it as an ordinary 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 gives a number of benefits. It might allow message supply even when the sender’s gadget has restricted or no mobile sign, so long as there may be an energetic web connection (Wi-Fi or cell knowledge). This technique may also scale back prices, notably when worldwide SMS charges are excessive, because the app supplier might have agreements that enable 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.