Visit the following page for the latest firmware and manuals for Teltonika Routers
The following firmware is the latest firmware available at 7th March 2016
For RUT 500 with codes : RUT500 x1xxxx, RUT500 x5xxxx and RUT500 x8xxxx use “RUT5XX_NW_00.01.915” fw
For RUT 500 with other codes use “RUT5XX_R_01.00.868” fw
For all RUT 550 use “RUT5XX_NW_00.01.915” fw
For all RUT 9xx use “RUT9XX_R_00.02.122_WEBUI.bin” fw
Also do not forget : DO NOT keep settings when flashing !