I think it's time for a new thread as I'm pretty sure my problem isn't unique. I have had an Xperia arc longer than most, and already done the first firmware update. However, I am still having problems. Firstly, I connect via Wi-Fi (whatever setting used for sleep, either when screen turned off, except when on charge, or never) and it remains connected - but seems to stop working after fairly minimal amounts of data transfer. The problem seems to occur though when there's a lot of data being sent. I can almost perfectly recreate the problem by streaming video with BBC iPlayer or downloading a file. What seems to be happening is that I am losing the connection, but the phone doesn't show that. It keeps the Wi-Fi icon on, but isn't connected. I can't easily tell if that's the case (by looking at the router info) but it seems to be easy to confirm by the simple fact that it shows it is still connected even when I go out of range of the router, or power it off. I've left the office (so another router, the one at home is D-Link, the one at work is an Apple one) and got on the train, underground, to see that it's still connected.. and when I go above ground and reconnect to the mobile network, I can't send/receive data as it's giving an error related to no Internet via Wi-Fi. Well, duh, there's no Wi-Fi! The only solution now is to turn off Wi-Fi and use 3G exclusively. Leaving Wi-Fi on also seems to destroy the battery (from 88% to 17% overnight having done nothing). I'm seriously tempted to return to my Motorola DEFY, even though I'll lose the great camera. Is it just me (a hardware issue) or is anyone else having problems? I really don't think it's down to the router you're connecting to, this is the phone. I have over 15 devices I regularly connect at home/work and they all work fine.