If you are experiencing issues with getting your Teltonika RUT950 4G router that uses the Telit module to connect to the 3G/4G network then please ensure that you are upgraded to the latest FW and in the APN settings page tick the Use IPv4 option and this should resolve your connection issue
Download Latest FW (RUT9XX_R_00.02.986_WEBUI.bin) – 06/01/2017