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You can download map data to your Nokia 500 only over Wi-Fi connection or via Nokia Suite, downloading over cellular connection is not supported. If you don't have Wi-Fi connection available, plug in your phone to PC running Nokia Suite and download the map data via Nokia Suite.
ya i hav the same prob wid my nokia 500...it says connection unavailabl...n in my mob nt only maps r unconnectd bt i m nt even able to connect to ovi store..it nly connects through wi-fi..nt d packet data..n i dnt knw y!!!
ovi store also can't b opened in nokia 500 widout wi-fi connection??many apss r nt connected cz connection is unavailable..??doesnt nokia 500 use cellular connection for ovi store also????
There's no restriction in connecting to Nokia Store via the cellular connection, it's just the map data download that is restrictied to Wi-Fi only (because of the large amount of data in the maps).
If the Nokia Store connection over cellular connection is not working, it can be something in the internet access settings, e.g. a wrong access point selected in Connectivity > Settings > Network destinations > Internet.