iPhone 4S T-MobileT-Mobile last month made clear their desire to acquire Apple's almighty iPhone, but that, "Ultimately, it is Apple's decision… We've expressed our interest."  "But the company has other great phones," Sherrard also said in the statement.

Well, their optimism can only last for so long. A new report from Business Journal suggests Magenta is becoming increasingly concerned about the matter, and that T-Mobile executives are warning the company may find it difficult to retain customers who opt to leave for an iPhone-carrying competitor.

Now that Sprint has bet the bank on the iPhone, T-Mobile is the only of the nation's four largest carriers left not selling Apple's smartphone. This, T-Mobile admitted, could make for a very unpleasant fourth quarter. Many expected AT&T's proposed acquisition of the Deutsche Telekom owned company to rectify the issue, but the U.S. Justice Department and others have rallied to block the deal.

During Q3 this year, T-Mobile saw a dip in revenue – $4.67 billion, down from $4.71 billion last year – while operating income was up year over year, so things aren't deplorably bad.

T-Mobile USA CEO Philipp Humm said that operating income has improved due to the company's, "Continued focus on making smartphones affordable to all Americans through our unlimited Value plans, improvements to our 4G network, and an expanding portfolio of 4G devices. However, Humm said that postpay churn will, "Continue to be an area of concern."

T-Mobile is still holding out hope that the merger with AT&T will still go through in the first half of next year, meaning the company would finally get an unmistakably large missing phone for their lineup. If no deal goes through, and T-Mobile continues to go on without offering the iPhone, they'll need to make some big moves to keep consumers onboard. The fourth quarter is shaping up to be a very telling few months.

Have you left T-Mobile for an iPhone?