A 2.4G/5.8G BLE/BT transceiver in 55nm CMOS employing polar modulation is presented to optimize performance while minimizing cost. A digitally modulated PA is implemented to modulate the RF envelope. A novel RX/TX co-matching method using bondwires is presented to optimize RX/TX performance. The measured sensitivity and max output power in 2.4G BLE mode are -97.5dBm and +12dBm, consuming only 10.8mW and 55.6mW (28.5% efficiency), best in state-of-the-art designs. The sensitivity is -95.8dBm and output power is +3dBm in 5.8G BLE mode. In EDR3 mode, the sensitivity and output power are -88.5/-86.8dBm and +10/0dBm at 2.4G/5.8GHz and the DEVM is 8.5%.