Parramatta five-eighth Corey Norman won't face sanction from the NRL for using a mobile phone during the Eels' season-opening loss to Brisbane because it's not against the rules.

Norman's night ended early when he suffered a neck injury late in the first half of the 17-4 defeat at Pirtek Stadium, playing no further part in the game.

However he was captured on camera in the dressing rooms appearing to use a phone, with commentators speculating he was informing his family on his health after the ugly tackle which resulted in his injury.

But the NRL confirmed neither Norman nor the club has a case to answer.