The first iPhone, released on June 29, 2007, marked a significant milestone in mobile technology. Apple revolutionized the smartphone market by combining a phone, an iPod, and an internet communicator into one device. But the success of the first iPhone was not solely due to its innovative features; it was also supported by strategic partnerships with mobile carriers.

Upon its release, the first iPhone was exclusively supported by AT&T in the United States. This partnership was a significant factor in the initial success of the device. At the time, AT&T was the only carrier that could offer the necessary data network capabilities to support the iPhone's extensive internet features, including web browsing and app usage.

AT&T's exclusive deal with Apple meant that the first iPhone was not available on any other US carrier, which generated both excitement and criticism among consumers. Many potential iPhone buyers were tied to other carriers, which limited Apple's reach at launch.

While AT&T was the exclusive carrier in the United States, the first iPhone was available through various international carriers, depending on the country. In the UK, O2 was the exclusive carrier, while in Germany, T-Mobile held the rights to sell the device. This strategy helped Apple establish a foothold in key markets outside of the US, allowing the brand to grow rapidly.

Additionally, other carriers worldwide began to offer the first iPhone shortly after its launch, which helped Apple expand its global presence. Countries like France saw the first iPhone being sold through Orange, and in Australia, it was available through Optus.

The exclusive carrier partnerships for the first iPhone significantly shaped the smartphone landscape. AT&T invested heavily in infrastructure and marketing to support the launch, while Apple utilized these carrier relationships to create a buzz around the device.

However, the exclusivity also drew criticism from consumers who felt they were being forced into a particular network. This prompted discussions about carrier competition and the need for unlocked devices in the future.

The first iPhone laid the groundwork for an entire ecosystem of smartphones, leading to the explosive growth of app stores and mobile internet usage. The partnerships that supported the first iPhone showcased the importance of collaboration between hardware manufacturers and carriers, a model that continues to this day.

Over the years, Apple expanded its carrier relationships, and the iPhone eventually became available on multiple networks globally. This shift has allowed Apple to dominate the smartphone market, with millions of units sold worldwide.

The carriers that supported the first iPhone were pivotal in its launch and success. AT&T's exclusive partnership in the US and other major international carriers played essential roles in establishing Apple's presence in the mobile market. Today, the legacy of the first iPhone continues to influence how smartphones are marketed and sold across the globe.

For more information about the evolution of the iPhone and its impact on technology, check out our related article on the history of the iPhone.