Israel on Sunday began testing an SMS system for warning the public of an imminent missile attack as chatter over a possible strike on Iran dominated the Israeli press headlines.

As testing began, Prime Minister Benjamin Netanyahu said Israel had chalked up "a significant improvement" in its home front defence capabilities, mentioning its highly-vaunted anti-missile systems such as Iron Dome and Arrow 2.

"There has been a significant improvement in our level of defence capacity on the home front: with Iron Dome, with the Arrow, in terms of protection and shelters, in advanced warning systems and in other areas," he said at the start of the weekly cabinet meeting.

"But all the threats which are directed towards the Israeli home front are dwarved by another threat -- different in both its scope and its essence. And so I repeat: Iran must never be allowed to get nuclear weapons."