Apple(s AAPL) is reportedly planning to start production on the next generation of the iPhone sometime in the second quarter of 2013, according to a report in the Wall Street Journal. That means production could start anytime from today through the end of June. Apple has made a new iPhone every year since 2007, so the start of production of a new model isn’t a surprise. However, the timing would suggest a launch of the latest iPhone some time this summer — less than a year after the iPhone 5 arrived.

According to the report, Apple has two different phones in production, the follow-up to the iPhone 5 and the long-rumored low-cost iPhone:

At the same time, Apple continues to work with its manufacturing partners in Asia on a less expensive iPhone that could be launched as soon as the second half of this year, these people said…