no headphones or anything, just built in speakerphone.
before, i would call someone on speaker and the screen would shut off after a little while to conserve battery. when i wake the phone up, the screen before would still show the phone interface, even though it is locked. This lets me end the call without first having to unlock the phone.
now, it just shows my locked phone screen, with no way to quickly end the call or do other call operations, unless I unlock the phone, quickly tap the green bar on my phone screen to switch to the phone app.