>Arnold315...
"...do I need Nokia Maps or Bing Maps for the navigation to work ?"
As mentioned by others prior, HERE Drive is the app from Nokia that gives Voice turn-by-turn navigation
Bing Maps and HERE Maps both provide basic mapping info (written directions) + local info/places of interest along the way....but no Voice turn-by-turn. But both Bing Maps and HERE Maps have a link inside the app to enable HERE Drive from the app for Voice turn-by-turn...if you happen to be using Bing or HERE Maps at the time...so convenient.
However, to answer your question...you don't actually
need either Bing Maps or HERE Maps to in fact use HERE Drive for your Voice turn-by-turn directions. You can use HERE Drive alone w/o the others installed (tho Bing Maps is an HTC8x default install) to get voice turn-by-turn directions.
So as mentioned by others prior, it seems Bing Maps and HERE Maps are redundant. However there are some benefits to their use if it fits your needs. They both provide local places of interest etc (which other apps also provide). So it's a matter of personal needs I guess. I personally have them all installed but now that I see how much overlap/duplication of services the various Maps apps provide I might re-consider if I need to downsize for space or to just simplify things.
From Nokia's Help pages....
HERE Help
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What is the difference between Nokia Maps and Nokia Drive in my Nokia Lumia phone?
- Nokia Drive is an application for voice-guided drive navigation. Nokia Maps is a map application which shows your current position and interesting places around you. Nokia Maps provides also routing information for planning a route to remote destinations.
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Also not mentioned prior are 3rd party apps,
gMaps and gMaps Pro GPS Voice Navigation, which are excellent.
gMaps GPS Voice Navigation ('Buy') is the paid version but a reasonable alternative if you don't like the HERE voice turn-by-turn. The free trial version(
gMaps) GPSVoice Navigation ('Try') limits voice turn-by-turn to an 11 mile radius I believe. Just providing the options that are out there.