I used to use AT&T Navigator (instead of TeleNav) on my 8310. Now that I've upgraded to the 8900, it seems the AT&T OTA link doesn't recognize the 8900 whereas Telenav's OTA link does. Bottom line - I can't download AT&T Navigator onto the 8900.
Anyone using AT&T Navigator on their 8900? How can I download it on the device?