The telenav page shows the download link as
TeleNav for at&t devices. I changed the "at" at the end of the link to "tm" and it is downloading now.
Oh well, the download started but it gave me a message saying there was incompatible data already on the device, continue with the upgrade? I cliecked yes, it started the download then failed. The AT&T download is still at v4.7.
Regards-Michael G.