The process of downloading the Aastra 6737i SIP Phone Firmware 3.3.1.5089 driver should begin automatically after a few seconds. If this does not occur, click on one of the links below (we recommend downloading the Aastra 6737i SIP Phone Firmware 3.3.1.5089 driver from the primary server - this is the manufacturer’s Aastra 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 Aastra 6737i SIP Phone Firmware 3.3.1.5089 diver.