We have recently noticed a number of iPhone/iPad customers reporting connection issues with our iAIS and WLN10 products. Fault symptoms have been; unable to connect to the wireless network, TCP connection time out and connection stability problems. A quick search on-line found evidence that other Apple users had found Wi-Fi issues as well and they all seemed to be centered around devices with iOS V6.0.0, V6.0.1 and V6.0.2.
Armed with this information, we recommended the customers that had contacted us to update the firmware in their iPhone/iPad to the latest V6.1.x and in all cases the strange problems/behavior disappeared and they started getting reliable wireless connections again.
We cannot find any “official” note from Apple that confirms the experiences of our customers but we would definitely recommend that any customer with iOS V6.0.x updates to the latest V6.1.x.