Wow, you live and learn - I'd never thought of keeping anything extra in my bra, let alone keys or a mobile phone.
I've learnt never to keep my phone in a tight pocket, as I always manage to reject the call by squeezing the phone trying to get it out of pocket. I don't keep it in my handbag either, as I don't carry one around the smallholding

I wear cargo trousers with zip up side pockets, so I have room for everything plus the kitchen sink, but can barely keep the trousers up for the weight. Zip pockets are good if you don't want your phone to go down the loo - commonest accident to mobiles apparently, and horrible to fish out. If I'm wearing trousers or skirt without pockets, the phone goes in a jacket pocket. For the summer, I have one of those jackets with loads of pockets - I can never remember which one the damn phone's in when it rings
