( CNN ) -  Between June 29, 2007 -- when the iPhone first went on sale -- and the end of 2015, Apple has sold 896 million iPhones. If Wall Street analysts' forecasts are accurate, Apple will sell its billionth iPhone sometime this summer.

When Apple provides its quarterly finances on April 25, the company is expected to report that it sold 50 million iPhones during the first three months of 2016.

That would get Apple to 946 million total iPhones sold. During the current quarter, analysts polled by FactSet said they expect Apple to sell another 44 million, pushing the total to 990 million.

Despite some relatively lackluster enthusiasm about the iPhone lately, Apple has an outside shot at getting to 1 billion iPhones before July. To accomplish that, Apple would need to best forecasts by just 10 million iPhones. If the new iPhone SE helps boost sales during the spring, it's within the realm of possibility.

If analysts' forecasts hold true, however, Apple should sell its 1 billionth iPhone in July.

The iPhone is one of the bestselling tech products of all time. For perspective, Apple also makes the bestselling tablet (the iPad) and music player (iPod), and the Mac is among the top selling PCs. Yet Apple has sold more iPhones than Macs, iPads and iPods combined, dating back to 1993.

By itself, the iPhone brought in enough revenue last year ($155 million) to place fifth on the Fortune 500 list.

One billion is a familiar number to Apple. In November 2014, Apple sold its 1 billionth iOS gadget, which includes iPhones, iPads and the iPod Touch. In January, Apple said it has 1 billion devices that are currently in use by customers.

But selling 1 billion of a single product alone is an even more significant milestone.

The iPhone has been on sale for nine years, but Apple has sold half of its iPhones just over the past two. At its current pace, Apple should sell its 2 billionth iPhone by 2020.