The process of downloading the Yeastar MyPBX Standard IP Phone System Firmware 20.20.0.21 Beta driver should begin automatically after a few seconds. If this does not occur, click on one of the links below (we recommend downloading the Yeastar MyPBX Standard IP Phone System Firmware 20.20.0.21 Beta driver from the primary server - this is the manufacturer’s Yeastar official website). If the download still fails to run, check whether your anti-virus software is not blocking the connection to the manufacturer server of the Yeastar MyPBX Standard IP Phone System Firmware 20.20.0.21 Beta diver.