Nokia is urging cell phone operators to block a certain text-message that when sent to Nokia handsets, prevents that handset to receive any more messages -- ever.

The vulnerability, dubbed the Cruse of Silence affects phones running the Symbian operating system, found on most Nokias.

Nokia is asking operators to filter or block the malicious SMS from being sent .

This does not pose a serious risk to customers and that they have received no reports of customers using S60 phones being affected by the malware, the firm said. The company has said that it takes such claims seriously nonetheless. The Finnish giant is urging customers not to open SMS text messages from unknown senders and is reportedly working with Symbian to remedy the glitch.

The company may also try to solve the problem via firmware update.

Nokia gained full ownership of Symbian this past fall.