Purchased my iPhone 3GS a month ago. Brought it home, opened Safari, found my home network (BT broadband on HomeHub 2.0), entered password and away I went. No problems. Fast forward to last Friday evening where I updated my phone software to 3.1. Download and install went off without a hitch. Opened Safari and was asked to enter my wifi password but after entering the following message popped up 'Unable to join the network "BTHomeHub2-JPS4" ' I have tried and tried to connect, reset the network settings on the iPhone, rebooted the HomeHub (router) on a couple of occasions and all to no avail, getting the same message every time (and yes it is the correct password). Wifi is working fine for 2 notebooks and my partner's iPhone, so no problem there. Also able to connect to wifi hotspots when out and about with no issue. Can only think it is an issue related to the 3.1 upgrade, too much of a coincidence otherwise. Anyone else have a similar issue/able to offer any advice? Thanks in advance.