More iPhone bemusement: O2 is once again offering the 16GB iPhone for sale through its online store, following last week’s O2  announcement, “Please note: 8GB and 16GB iPhone are no longer available.”

The iPhone drought intensified when Apple this weekend withdrew both models from sale through its online store, with a later Computerworld report explaining the product is sold out, “company-wide”.

The on-off nature of present-day iPhone availability is sure to increase expectation that Apple may bring forward the release of the next generation of its device, which has been expected to debut in June.