When we talk about grey routes for SMS sending, we are basically referring to low-quality and in some cases even illegitimate sending routes, especially when we talk about sending via SIM cards.
The sending route determines the routing of the SMS, that is, the connection implemented to send it and, therefore, the path that the SMS takes from when it leaves your SMS provider's application until it reaches the user's terminal.
Direct routes, as the name suggests, use direct connections to the carrier, so there are no middlemen. The SMS leaves your provider and is sent directly to the carrier, who then delivers it to the recipient's device.
Since there are no multiple connections, quality is maximum as is delivery reliability.
They also offer, on the contrary, the so-called grey routes, which algeria business email list are interconnected routes between multiple providers, using networks in countries where the service is cheaper in order to reduce costs. But while they reduce costs, they substantially reduce quality.
Delays are experienced and many SMS are lost due to the large number of intermediate connections and nodes through which the SMS has to pass. Delivery notification, if offered, is unreliable.
Another drawback of this practice is that it may constitute a breach of the GDPR, since the SMS travels through different countries, usually outside the EU, until it reaches the terminal at best. For this reason, the confidentiality of the data and content cannot be guaranteed either.
If you need to reduce costs with your mass SMS sending, Mensagia recommends using direct routes and segmenting your databases well to reduce the number of SMS and send only to those recipients who are really interested in your content, your brand, etc. instead of using low-cost routes that endanger your company's reputation.