Ok this is going to sound strange but it works for me about 75% connect positive. When your PDN is asleep wake it up with the power slide while in landscape mode, if you have to go to the settings mode to reconnect the wifi manually do all this in landscape mode. It seems many of our friendly PDNs are very finicky saying this it seems that my wifi will reconnect under a minute when I reawaken it in landscape mode usually all the time even in true sleep for the night. Now when I wake my PDN in portrait mode my wifi will not connect and wont even search all I get is that my regular wifi connection is "remembered, not in range". Reboot your PDN then try this it may help or as our friendly PDNs have proven, may not.