The only Bluetooth issues I’v had are weird ones. Apparently I’m to tall for Bluetooth, at least the cheap headphones I bought. Place the phone in my left hand

The only Bluetooth issues I’v had are weird ones. Apparently I’m to tall for Bluetooth, at least the cheap headphones I bought. Place the phone in my left hand pocket and the headphones, which have the antenna on the right can barely pickup the signal. The there’s the implementation, and I cannot figure out how they messed up this one: Concept2 have an iOS app for their rowing machines. The previous version would pair the second you asked the rowing machine to connect. The new versions three to five times slower. It’s the same bluetooth stack, why would pairing change?