Need access to the handset to do this.
Same with "old school" bugs where you'd unscrew the mouthpiece on that heavy Bell Labs product.
I hate to prejudge but this happens to cute blondes quite a bit... who probably delegate any technology fixes/decisions to guys they use and throw away.
And wouldn't "bug mode" 1) run the battery flat in a couple hours and 2) incur massive network usage fees?