GPS question - Does voice guidance need data plan?

[paker]

I am using OSMAND. It shows the road and where I am offline. Map on sd. But it doesn't do voice guidance. It is my understanding that all offline gps need data connection to give voice prompt. Correct? Thanks.

 

[itsallgood]

For Google maps yes. For offline maps not so sure. I will have to try it tonight, in airplane mode, and see if I can still get turn by turn voice commands.

 

[Chip_365]

CoPilot, Sygic & Route66 do not need / use data for voice guidance. They only need the GPS active which does not use data. These are paid apps. I recently tried these 3 & found they all had pros & cons. But I did feel that Route66 had the best/clearest voices on my HTC DHD. But it is the most expensive unless you opt for world maps with the other apps. I purchased CoPilot on sale. I liked it's driving display & maps more than Sygic, also was on sale. Sygic offers a couple more features for the same price as CoPilot. Both apps have quite frequent sales so no real need to pay full price.