I have removed R913, which bridges the RING2 of the Headphone Connector to Ground,
Soldered in R912 in order to leave a proper GND on the Sleeve,
Removed R910, because it bridges MIC to GND and
Added R911 to Bridge MIC to RING2. I try to transmit using the RFAPP (WBFM-TX), but I only get noise.

My headset uses the following Pinout:
http://pinoutsguide.com/HeadsetsHeadphones/htc_hd2_headphone_pinout.shtml