Sprint is still struggling to regain a foothold in the treacherous mobile wars, which get especially gruesome around this time of year. Steve Jobs’ annual iPhone upgrades are becoming regular events around which mobile service providers now brace themselves for. Sprint CFO Robert Brust noted the summer flight of customers to AT&T with a freshly implanted desire for a shiny new iPhone during an investors meeting in New York this week, saying

“Every year all U.S. carriers, except AT&T, go through a little trauma called ‘iPhone introduction..We have a little churn issue called ‘People leaving to go to the iPhone.’ As people’s contracts expire they leave and go to AT&T for the iPhone.” This year, he said, he hoped the dynamic would be different because of the Evo.”

So how is the Evo working out for Sprint so far? The initial sales of Evo put the device ahead of numbers for the Samsung Instinct and Palm Pre combined. Sprint quickly retracted that statement, saying it miscalculated its sales numbers, though the Evo still performed very well and in record-breaking numbers. Additional reports note Sprint stores that have been selling out of the Evo, demonstrating the demand around the phone.

The first few days of success shouldn’t come as too much of a surprise, given the specs that came with the phone. The Evo features a larger screen than the iPhone, a 1 GHz Qualcomm Snapdragon processor and an 8-megapixel primary camera, 1.3 megapixel front-facing secondary camera. Running Android 2.1, Evo is also well-positioned for the growth of the Android Market and future Google initiatives, like Google TV.

Despite Sprint’s well-received Evo, Brust foresees flat revenues for remainder of year and little change from last year, though he sees more stability to the company overall. It looks like the now-common combo of HTC and Android can help to save Sprint yet.