Movistar declares war on spam calls: ai now your first line of defense

Telefónica’s Movistar is launching a full-scale offensive against the relentless tide of spam calls plaguing Spanish mobile users. Forget irritated sighs and ignored numbers; the company’s new “Vuelve a contestar ¿sí?” (Answer Again, Yes?) initiative leverages advanced network security and predictive AI to actively filter fraudulent calls before they even reach your device, a move that could reshape how we perceive the very act of receiving an unknown call.

The scale of the problem: millions of fraudulent connections monthly

Movistar isn’t just addressing a minor annoyance; they’re tackling a crisis. The company reports a staggering number of fraudulent connections each month, far exceeding the occasional nuisance calls that most users typically experience. This isn't about a few bothersome marketing pitches; it’s about millions of malicious attempts at connection, eroding trust in a fundamental communication channel.

The core of this defense lies in “Llamadas spam,” a smart filter embedded directly within Movistar’s network. Departing from the futile practice of relying on static blocklists, the system analyzes call behavior in real-time, employing predictive models to identify patterns indicative of spam, aggressive telemarketing, or outright fraud. When a new number entering the Movistar network exhibits these red flags, users receive an immediate on-screen notification—a clear “Spam” or “Fraudulent Call” label—allowing them to make an informed decision about whether to answer.

The service is automatically activated for most customers and is, crucially, free of charge. Movistar's confidence in the system is underscored by their internal data: since March 2025, it has reportedly blocked over 190 million fraudulent calls within Spain, boasting a detection rate nearing 97%. That's a figure worth noting.

Beyond network filtering: app-based control and a shifting legal landscape

But the fight doesn’t end with network-level filtering. Movistar and O2 (its sister company) have also introduced a function accessible through the Mi Movistar app, allowing users to proactively block unwanted calls before they ring. While not activated by default, this provides an extra layer of control for those particularly targeted by spammers. The process is straightforward: identification through DNI or phone line, navigation to the “Protección de Red” (Network Protection) section, and then activation of the “Identificación de llamadas de spam” (Spam Call Identification) options.

Of course, no system is perfect. There’s always a low risk of misidentification, a legitimate call flagged as spam. However, Movistar points out that those who attempt to contact you again will likely try another method, mitigating the inconvenience. The threshold for blocking is deliberately high, reserved for numbers exhibiting a strong history of spammy behavior.

The broader context is one of evolving legislation. Spain is actively working to curb spam through the new Ley de Servicios de Atención a la Clientela (SAC), which aims to address the shortcomings of the previous General de Telecomunicaciones law. The SAC introduces stricter rules, including mandatory advance notice of subscription renewals, a crackdown on fake online reviews, and a three-minute limit on customer service hold times. The law’s ambition is to not just punish spammers, but to fundamentally alter the landscape of online consumer protection.

The battle against spam is far from over, but Movistar’s aggressive strategy, coupled with evolving legal frameworks, signals a significant shift toward reclaiming the sanctity of the phone call. And with 190 million calls blocked already, the initial skirmish has already delivered a resounding victory.