Robert Murat's phone went silent from 15.45 on 2 May. He broke silence at 23.20 on 3 May. That's 31h 35m of phone silence.
Gerry McCann received 12 voicemail messages on 2 May, and effectively the last of these was at 15.49 (just four minutes after Murat’s phone silence commenced).
Gerry postponed listening to this voicemail until around 20.15 on 2nd May, at which point he turned off his mobile.
He took just one incoming call at 12.24 on 3 May. Then his mobile fell silent again until 23.14 (just prior to Murat breaking his own phone silence).
He didn't make a single outgoing call during that period. Although he listened to voicemail, his period of silence was approximately 31h 25m.