Currently Being ModeratedJan 8, 2013 10:46 PM (in response to Meg St._Clair)
Although this post is about iPhones 5, I'm having the same issue with my 4th-gen iPod touch. And it's only since I upgraded to iOS 6 yesterday (6.0.1 (btw, 6.0.1 is the latest version), via iTunes on my Windows 7 PC) that I noticed that. When I lock my iPod for at least 10 - 15 seconds while it's connected to a Wi-Fi network, even a very stable one, when I turn it back on, the arcs indicator is gone and takes 3 to 5 seconds to reappear. I even did this while I had an iMessage message being typed and locked the iPod on that screen, and when I came back after that while I saw the "Send" word on the Send button go from grey to bright white, indicating a re-connection, which didn't happen before or now when I'd locked it for less than 10 seconds.
This really worried me until I found your answer when I queried this issue. And proof that you're right, I plugged my iPod, locked it, then turned it back on after a few minutes and, there it was, still connected. So this behaviour is imposed by iOS 6 and not just on the iPhone. Under iOS 5 it didn't do that, although I did notice since about Christmas that the odd but fairly rare time the connection was gone and re-established itself as described. I had just gotten a Bowers & Wilkins AirPlay speaker so I thought it was to blame, but a quick test showed it had no incidence.
Now this behaviour is clearly a measure intended to save battery power, but what upsets me most about it is that if my iPod is sitting idle, connected (or as it should) to my Wi-Fi, with the screen off, and I get an iMessage, or worse, a FaceTime call, it won't ding or ring anymore! This kills the wonder of those two apps right then and there! I will miss just about every FaceTime call I get, and won't be notified of an iMessage until I unlock the device!
However, I bought my friend a brand-new iPod touch 4 like mine for Christmas, and his had iOS 6 loaded in it right out of the box. And it doesn't seem to do that. I'd also noticed that when we install a major new version of iOS over the previous one by upgrading, the new version's presence on the device is not pure, there are still minor leftovers of the previous one. Reformatting the iPod under the new version installs it purely like it came with it out of the box. So maybe I should do that, as only then it would be "adapted" to an iPod as opposed to the "generic" application of itself it seems to have like my device was an iPhone. But I'm not sure enough that that will do the trick.
Currently Being ModeratedJan 9, 2013 9:04 AM (in response to RichieRich1274)
The problem is not that your phone disconnects from wifi when locked to save power. the problem is that it doesnt automatically reconnect when you unlock the phone. here is the solution.
Over the holiday I got an iPad Mini and iPhone 5. On both devices my wifi disconnects often, especially when put into lock mode. I had to keep re entering password to reconnect, very annoying.
I read the discussions and had a thought to solve it. This fix works on both my iPhone and iPad.
Go to your wireless settings and disconnect. Then select any other network, one that you do not want to connect to.
Connect to the random wifi network and when prompted enter a password. Just make up any combination Of letters and numbers until the join button pops out in blue. Click join.
Obviously it will fail and tell you the password is incorrect. Back out and now connect to your wifi network.
That's it, problem solved. Both my iPad and iPhone now automatically reconnect to my network when I unlock device.
Currently Being ModeratedJan 10, 2013 12:25 PM (in response to iBushPilot)
Yes, this behaviour of an iPhone with Wi-Fi (automatically disconnecting when locked and not plugged in) is completely normal and it's what it's designed to do, and this discussion's real issue is the problem you and grantkm192 were having. But on an iPod touch, it's not normal. Since Wi-Fi, unlike on an iPhone, is an iPod touch's only connection with the outside world, an iPod touch is never meant to disconnect when locked, even while not plugged to a power source. Otherwise, how can an incoming FaceTime call ring it ?
Now, I found inspiration in your post by trying goofily simple solutions. I tried deactivating then reactivating Wi-Fi, to no avail. Then activating then deactivating Do Not Disturb, to no avail. It's then I had the idea of rebooting my iPod with the Wi-Fi active, which would be the 1st time since the upgrade to iOS 6 (I always keep it on Airplane mode when I don't use Wi-Fi, including when rebooting). Although I didn't really expect success, it worked!! After the reboot, it automatically connected to the network, and then when I turned it back on after locking it for more than 15 seconds, it was still connected! A battery of little tests afterwards showed that the situation had been restored to what it used to be.
Now, proof of this special design of an iPod touch's, I even observed that when the conditions are met for an iPhone to be automatically disconnected from Wi-Fi, on an iPod touch the arcs reappear after a fraction of a second when the screen is turned back on; in other cases the arcs are there instantly. I had noticed that on my friend's new iPod, while on mine they reappeared after 3 to 6 seconds, indicating a full re-connection as opposed to the fraction of a second.
So now my iPod is back on track managing Wi-Fi as an iPod is meant to!