FT-991 Software Update

The latest versions are listed below with the release dates. 
 MAIN Software Version 02-02 (07/24/15)
 DSP Software Version 01-04 (07/24/15)
 TFT Software Version 02-01 (07/24/15) 

*If you already have MAIN: Ver. 02-02, DSP: Ver. 01-04 and TFT: Ver. 02-01 software versions, it is not necessary to update the FT-991 again. 

There are four different Software installations. Each one must be followed carefully. Installing the wrong type software may cause difficulties. Check your radio before installing software to be sure which updates are needed. Please read the FT-991 Firmware Upgrade Manual before proceeding. 

If multiple software installations are required the MAIN software should be installed first, as it is the only one that requires a press and hold in the [F(M-LIST)] key while turning the radio back on. This resets the radio and locks in the new software.
Before installing new firmware, please verify your current version firmware with the following procedure:

FT-991 Software Update and Version Identification

http://www.yaesu.com/downloadFile.cfm?FileID=8936&FileCatID=42&FileName=FT-991%20Update%20Firmware%20Information%2007-24-15.pdf&FileContentType=application%2Fpdf

Download the FT-991 data and [FT-991_Firmware_Update_JUL24.zip] from the following website:
http://www.yaesu.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=102&encProdID=D24F 60F33816ED8BE5568D7E2B5E2131&DivisionID=65&isArchived=0 

Please read the FT-991 Firmware Upgrade Manual before proceeding! Main: Ver. 0202, DSP: Ver. 0104 and TFT: Ver. 0201 (07/24/15)

• The WIRES-X function is added*
  
• Improved and optimized.
  *This new firmware update enables the FT-991 operator to connect to a WiRES-X Node station and easily communicate worldwide through the WiRES-X VoIP network, without the need for any additional accessories.
  We hope this new firmware will increase your enjoyment of your FT-991. Thank you for choosing Yaesu radios. If you have any problems or questions, please contact Yaesu, Amateur Tech Support amateurtech@yaesu.com. 
  

http://systemfusion.yaesu.com/ft-991/