First-order effects

• Samsung and Sanyo get a marquee launch partner for new handsets, giving their devices a differentiated feature (over-the-air music purchases) at retail, while Sprint's subscribers gain phone-native access to downloads from day one.
• Apple faces its first US carrier-scale challenge to iTunes' dominance of paid digital music, since Sprint can bundle music into service plans and bill through monthly statements — something iTunes could not do.

Second-order effects

• Verizon Wireless, Cingular and T-Mobile would be pushed to strike their own music-label and handset-maker deals to avoid ceding the 'phone as music store' positioning to Sprint, intensifying competition for exclusive content and device features.
• Record labels gain a second major US distribution channel beyond Apple, improving their negotiating leverage on pricing and DRM terms across both carriers and iTunes.

Third-order effects

• If carrier music stores took hold, handset vendors would become gatekeepers of media consumption — a structural shift away from the computer-as-hub model that ultimately gave way to streaming; Sprint's later 33% stake in Jay Z's TIDAL shows the same carrier-content ambition resurfacing a decade later in streaming form.
• The pattern points toward telecoms treating media and content partnerships as core strategy rather than side business — a precursor to today's bundling of streaming services with connectivity plans.