hi
For maps on the go without data is the Nokia Lumia 520 at $149 from Telstra the best value GPS phone to get?
Also is it cheap to unlock from Telstra?
http://www.jbhifi.com.au/phones/nokia/lumia-520-black-prepai…
Also thinking maybe to get it from AMAZON and then unlock it here in Aus, cause it only $55USD:
http://www.amazon.com/Nokia-Lumia-520-GoPhone-AT/dp/B00E4504…
I have a 520 and it's quite good, but Windows Phone OS isn't quite up to the level of Android/iOS IMO (although 8.1 should help that).
The phone itself is pretty good—it feels pretty solid etc. The battery lasts 2-3 days of light/medium use. The maps without data feature is great :)
Regarding unlocking, not sure as I bought mine unlocked. But if you are going to use it on Virgin/Optus you will need to import as that network uses different frequencies for 3G. The phone will still work but you'll fall back to 2G a lot of the time. The Amazon one may have the same or different bands, so check that before purchasing.
There are quite a few going for about $50-70 on eBay as well if you want second hand…