I'm now in my 23rd year of training and can honestly say I have never taken a phone into the gym. The last guy I trained with used to bring his phone in and would be checking his Instagram and Facebook in between sets. Needless to say we don't train together anymore.
He texted me recently asking about dbol and clen - wanted to run them both together because he wanted to "bulk and cut at the same time" 
That's how it used to be back in the day for me as well. Not as long as yourself but the premise of not fucking around with mp3, or CD players, phone was the same. Had the best training partners back then too. Now...good luck. Most people are morons.
Check this quote out. Its all you need to know about a persons self discipline and reasoning skills. Bet she looks amazing.
Maria Daigle, 45, a nurse from Metairie, La., said she has every right to use her cellphone during workouts at her club, Elmwood Fitness.
“At a gym, I don’t think people should have to be quiet,” she said. “I don’t see the difference between two people next to each other
screaming over the elliptical to hear each other. It’s not the library, and it’s not a bookstore.”
If I trained this bitch, she would be too winded to utter a word.