Shares of Sprint Nextel (S) - soon to be the only major wireless carrier without the iPhone (AAPL) - are down a whopping 12% premarket. Sources say AT&T's (T) courting of T-Mobile USA (DTEGY.PK) was partly a ploy to break up merger talks between Sprint and T-Mobile, and that Sprint remains "a lackluster target." DT +13.4% in Frankfurt. T +2.7%. VZ +2%.