We have two Macs (MacBook Pro, iMac) and one iPhone 4; OSs up-to-date (Lion, iOS5). Our only routine access to the internet is via the mobile phone 3G network for the iPhone, and via a 3G USB stick/dongle for the Macs, also using the mobile phone network. We do NOT have access to the internet via a local wi-fi link to a router (whether ADSL or cable). This is in Melbourne, Australia, btw. Question: is there any way at all that we can get syncing of contacts and calendars for all three devices? - preferably automatic, ideally real-time whenever a device could see the internet. With syncing set, there seem to be some random updates (and duplication) between devices, but it seems that normally syncing is enabled only when the device sees the internet via a local wi-fi link to a router, and that's what we don't have. (We can't trundle the iMac to an internet cafe either!) Understood that a local sync would be possible via iTunes for one of the two computers and the iPhone, provided they could see each other wirelessly - but there's a second computer... E-mail no problem; we use IMAP. All suggestions gratefully received!