Originally Posted by EDTIVA
When my phone sleeps for a duration of time, upon wakeup my Wi-Fi shows it is still connected but zero data can be transfered. E-mail/playstore/browers can not connect. I have to turn wifi off and on again for it to re-establish. This causes my email pushes not to come through. I've played with some router settings, but have not forced the phone onto 2.4 or 5ghz. WMM is enabled as well. I have now just enabled the wifi sleep trick in the service menu, and I had the keep wifi on during sleep already on in the regular menu. Now my screen won't time out after the service menu trick. I called for a handset replacement and got the speech about clearing cookies and wipe phone data. Sigh... So I have to remember to turn this on every reboot and make sure to turn my screen off each time. Regret is sinking in, as I told my self never again after a Behold II. T-mobile please get a good HTC phone, I think the S3 is going back!
This is exactly the issue I am experiencing with my VZW GS3 connected to my home Apple Airport Extreme. None of my previous phones (iOS and Android) had this problem, but the S3 is having it intermittently. After not using my phone for a while, I'll turn the screen on and have no data connection. However, it still shows it is connected to my WIFI, but no data will go through. If I go into WIFI settings and try to re-connect, it will not do it. Simply turning off WIFI and turning it back on corrects the problem immediately (it will re-connect to my WIFI automatically after doing this). I mostly notice this after checking my phone first thing in the morning after waking up. If I don't have my phone plugged into the wall charger, my phone will lose a lot more battery because it is on the 4G network instead of WIFI (even though it shows I'm still on WIFI).
So far, it hasn't been a major issue for me, but definitely one that needs to be addressed.