hi, i can answer this using my own personal experience... navigation is only free on sero if the sprint employee u got ur sero thru is still employed... when my friend was still employed, i got free navi from may-around january and my sero 500 was $20 a month with my instinct s30. when they quit or whatever around january, i got a call from sprint saying my bill would change to $30 a month, navi would no longer be included free, and i either had to change fones r plans since instinct OS, WebOS, and Android require GPS. this also explains why some people have android on there sero and i was able to use a instinct, the employee that their sero is linked to is still employed...
let me know if you have any questions about sero, when the guy from sprint called me, we had a pretty long convo about sero and he seemed to know what he was talking about. hope this helps, dont forget to hit thanks
