Apple will likely kick off its next iPhone in late June, projects Piper Jaffray analyst Gene Munster.
Assuming that forecast comes true, Munster believes Apple will sell 4 million units of the new phone before the month and the quarter are over. That estimate compares with the 5 million iPhone 5 handsets sold during that model's opening weekend.
The analyst expects Apple to sell 30 million iPhones over the June quarter, a 15 percent increase over the same quarter a year ago.
What will the iPhone 5S offer over its predecessor?
Like most analysts and Apple watchers, Munster expects the phone to include a faster processor, better camera, and new software features tied into the hardware. He thinks there's an "outside chance" the 5S may come with an NFC (near-field communications) chip to open the door for mobile payments.