Piper Jaffray analyst and longtime Apple watcher Gene Munster has a better guess: October 2012.

In a note today to investors, Munster predicted the successor to the iPhone 4S will arrive in October, Bloomberg . The next-gen model will feature a new design and work with 4G LTE networks, he wrote.

The October launch date is actually a revision of the financial analyst's earlier prediction of an August release. Qualcomm, which supplies radio chips for the iPhone, is having problems meeting supply demands, according to Munster.

A rumor last month from predicted the next iPhone would feature a 4.6-inch display. The iPhone 4S's screen measures 3.5 inches diagonally, which is downright tiny compared to the latest Android and Windows Phone handsets.

Samsung's , for instance, has a 4.65-inch display and its skirts dangerously into tablet territory with a gargantuan 5.3-inch screen. The , which runs Windows Phone, has a 4.7-inch display.