On wifi and a halfway new phone, it takes about an hour.
Seriously?

It has never worked that fast for me. It doesn't matter if I use wifi or 3G, it takes a long time. I've been running it now for over 24 hours and it's still 39 weeks away. It just downloads for a little while and then stalls. And stalls. And stalls. Then downloads for a little while. And stalls. And so on. It has always been like this but recently it has been much worse than before.
Meanwhile there are no problems with the connection in my phone or the phone itself, everything else works perfectly. It's a Huawei U8800 (Ideos X5) and my wifi is very high speed (100 mbps) and the 3G is 10 mbps so that is not the problem.