I will confess to taking my cell phone into the stall one time, and only one time.
I woke up one morning with a flat. Called in to set up a repair. They would send someone who would call me first. OK. I waited. And waited.
Finally, couldn't wait anymore. You guessed it....the two minutes I'm in there, the #### phone rings. I did NOT answer it. Finished up and called back. Even told the guy why I didn't answer....I think he was still laughing when he drove up!