Everybody with an older iDevice hurries to upgrade to iOS 5.1.1. This is great especially when you want to keep up with the latest news. However, as some users pointed out, there were some problems related to the Wi-Fi connectivity after the iOS 5 upgrade. From some reason or another, some users lost their internet connection through Wi-Fi after their updated their iOS. This seems to be a bug from Apple, which will be fixed in a way or another in a short while. Apparently, users who complained about this bug were iPhone 4S owners. Until then, here is a genuine option that proved to be quite successful for most of users who complained about the same problem. There are the two steps you need to follow if you want to repair the no Wi-Fi error of connectivity on your iPhone 4S device.
1. Try to restore your device using the iTunes account. In this way, you will get back to an initial phase where you have your Wi-Fi connectivity. Assuming that some of you already know how to use the iTunes account to synchronize all data and files. In this way, you will gain your old data back, right in the moment before the upgrade to take place.
2. The second step should be done only in case you do not succeed with the first one. If the Wi-Fi connectivity icon is still grey, it means that the Wi-Fi still does not work. In this case, all you have to do is to go to the Settings tab>General>Reset>Reset network settings. After you finish these two steps, the Wi-FI connectivity should become available.