We are currently on Firmware Version 0625C39. I went into our signaling server > Ip Telephony > Software > Telephony Firmware, and under Latest Firmware Version for IP Phone 1140E i tsays 2.1B (0625C1B.bin) New Version Available. Under Local Firmware Version it says "Not Available". On our IP phones themselves the Firmware Version says 0625C39. Our vendor is saying that if we are not having a problem not to update the firmware, however we purchased Algo USB Analog Terminal Adapters and they work on the USB port of a PC with an I2050 Softphone but not on the USB port of an 1140E. I was told we needed to update the firmware. Anyone aware of any issues of updating the firmware? If I update it and then start having problems is there anyway to revert back to the old firmware?