I sent Parrot an email asking them that if I imported a US unit; and reflased the Australian update via their "software updates" page (link here), would it then work as intended in Australia? It looks like the files are effectively ROMs, so it should work correct? Does anyone know if there are hardware differences?
They gave me a very standard "buy local, we don't support importing" response:
The Parrot ASTEROID range are country specific for tuner, navigation (AU maps), licensing, apps and software, so you will need to purchase an Australian product if you want to use it in Australia.
Further the product is sold in Australia to comply with Australian Consumer Law which doesn’t apply overseas.