T-Mobile chief marketing officer Cole Brodman's admission last month that the carrier wouldn't be offering the new iPhone was widely publicized, but apparently hasn't done much to stem the loss of disappointed customers all the same. In a leaked internal document uncovered by TmoNews, the company acknowledges an uptick in recent calls to its retention and service cancellation department since the launch of the iPhone 4S on competitors AT&T, Verizon Wireless and Sprint. In response, it has put together a concerted effort aimed at keeping current customers right where they are.

The memo directs those who are upgrade eligible be offered the HTC Wildfire S at no charge after $50 mail-in rebate. It also outlines an upcoming SMS campaign that will emphasize this deal to around 500,000 customers deemed likeliest to jump ship. "Give iPhone 3GS an inferiority complex," reads the message, which comes off as an odd marketing decision to us considering the 3GS likely isn't the device most folks are lusting (and leaving) over. It's also worth noting that this isn't exactly a steal considering the aforementioned Wildfire S can currently be had on T-Mobile's online store for free following an additional web order discount — no rebate necessary.

Should the only national carrier without the iPhone be doing more to cut its losses? Would the Samsung Galaxy S II, HTC Amaze 4G, G2x or myTouch 4G Slide make for better devices to leverage with? We're eager to hear your take.