In a peculiar move, 9to5Mac reports that Apple is instructing Genius Bars at their retail stores to replace white iPhone 4 16 GB models that have issues with refurbished iPhone 4S models — provided the store doesn’t have any of the actual iPhone 4s in stock. This means that if you’re iPhone has an issue and the genius concludes it needs to be replaced, you’ll get a free upgrade to the iPhone 4S, which was recently released in October of 2011.
Apple is apparently telling their Genius Bars to do this unusual exchange because of supply constraints on the white iPhone 4 16 GB. Either that particular model is extremely popular, or Apple is having some sort of difficulty producing the exact model. In any case, now may be the time to bring in your phone if it’s been having any major issue and you’ve been procrastinating about it. Do understand that your local store may not be out of stock, so you’d be taking a chance.