That goes to the prosecution claim that Steenkamp didn't merely get up to relieve herself in the middle of the night, but in fact had locked herself in the bathroom with her cell phone to protect herself from Pistorius.

CNN: Lead investigator booted in Pistorius case

We've said it before, but it appears that we have to say it again, judging from a recent study showing that 75% of respondents have used their phone in the bathroom.

CNN: How to kill time without your phone

He switched off his phone, went into the bathroom, and showered.

NEWYORKER: The Maserati Years

He went to the bathroom, came back, turned his cell phone on, and put it down again.

NEWYORKER: The Maserati Years

Back then, Deane and her mother did it all, from answering the phone to weighing packages on the bathroom scale.

FORBES: Cambridge Satchel Has It In The Bag

And a man rang to ask for the phone number of a plumber as he had come home to find he had a leak in the bathroom.

BBC: Toilet roll 999 call made to Devon and Cornwall Police