I took my iPhone 4 (bought last August) in for a replacement (last October or so) and the new handset had the dreaded "coloured blob" where it's got a pink cast on the edges and green in the middle. A few weeks ago I had that handset replaced because the home button stopped working, and the new one has the issue too. Are we just stuck with this now? Clearly there are iPhones that didn't suffer from the problem (my near-launch model) but probably they've added or changed component suppliers since then. If all the new iPhone 4s now have this problem then obviously it's not worth going in for a swap. As a sidenote, I've seen a lot of speculation about the origin of the issue that's clearly not true. I see the green blob in two situations: 1) On the viewfinder, but not in photos, in moderate light (e.g. an overcast day) 2) On viewfinder and in photos, in low light (e.g. indoors or at twilight) It's not dependent upon artificial lighting at all, except that obviously artificial light is much dimmer than daylight. The green spot is clearly visible on the viewfinder if I'm taking pictures outside on a dim day. It's almost certainly a problem with the sensor itself, probably its baseline calibration at the supplier. It's not like iPhone 4s are the only handsts with this sort of issue.