A rendering of an iPhone 5 case has been making the rounds this morning, and the biggest news from it seems to be that there isn’t much to report. The image comes from the business blog Hardmac, which claims that their source is reliable, though they admit the information they have is not confirmed.

Even taken with a grain of salt, the case covers show that there are no fundamental design changes to the exterior of the iPhone 5, which isn’t too hard to believe. Case leaks have a decent, if not stellar, record of showing what will come in Apple’s next-generation tech. They were mostly accurate when it came to the features on the iPad 2, such as dual cameras.

True or not, the cases should help quash the rumor that surfaced early this week from Chinese parts reseller iDealsChina that the iPhone 5 will have dual SIM card slots. iDeals China itself has said that its intel on that leak was wrong, but the rumor just keeps going. The renderings also make the chance of a sliding keyboard seem less likely, though they offer no hint about a larger screen.

Of course, the cases give no hints on the talk of a new edge-to-edge screen on the latest iPhone 5, which also showed up at iDeals China this week.

9 to 5 Mac pointed out when the SIM card rumor bobbed up that iDealsChina has a spotty record on leaked information, though it has been right about design changes in the iPhone 3G and iPod nano.

It’s been a week of dueling iPhone 5 rumors, with reports surfacing that Apple will not include near-field technology in the iPhone 5 as many suspected. In fact, the only rumor that seems to have lasted more than a few months is the one that Apple’s iPhone will be cheaper — something Apple COO Tim Cook alluded to earlier this month.

What’s your wish list for Apple’s next handset?

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