Ok, I've almost rationalized keeping the wifi iPad and returning the 4G one. My logic is that I use it mostly at home and work and don't want to pay for multiple cellular connections. I surely will own a 4G enabled phone (either Samsung galaxy s3 or iPhone 5 if the display stops being tiny) in the summer, and plan to instead rue chase a tethering plan for it. Also, my 4G iPad has noticeable background bleeding on one side which the WiFi version doesn't have. Anyway, while I was using the WiFi-only version this evening I noticed that the connection is intermittent and varies between one bar and 3 bars while I'm sitting in the exact same location of our house. The actual network speed seems to vary accordingly. I never noticed that behavior with the 4G enabled iPad that I've been using over the last 10 days. I've read of people having problems with their wifi on some models, but didn't see any discussion of a possible correlation between model and connection issues, i.e. in particular whether the 4G model had the issues and the wifi one didn't, or vice versa. Furthermore, I wonder whether the fact that the 4G model has a plastic bar on the top of the case affects wifi reception to any extent? Looking at the ifixit tear down it seems as if the wifi and 4g antennas are sitting very close inside the iPad, however it is not clear whether either of them sits near the plastic bar. But I find it hard to interpret the pictures ifixit posted. Can anybody shed any light on this?