Ever since I got my iPad it has always been disconnecting at random moments. When it disconnects, it still shows a very strong signal at the upper left corner but cannot go on the internet anyway. The only way to get it online is to turn the wifi off and on again. This happens to me around 10-15 times a day and around once a day I have to restart the iPad because turning the wifi off and on doesn't work. I have googled a bit but the most common wifi problem seems to be completely different. Is this a problem with my wifi connection or with my iPad?