Apple's iPhone 5 release date is almost here. The company has sent out invitations to an October 4 event, and Apple is expected to unveil its new iPhone 5 that may feature a massive 1GB of RAM.

Apple's invitations for the Oct. 4 event direct guests to the company's Cupertino, Ca., campus at 10 a.m. PT. The invitation says simply: Let's talk iPhone.

It also includes four iOS icons showing the date, time and location of the event venue.

The iPhone 5 has been one of the most anticipated consumer products ever. Apple's iPhone, launched in 2007, is the world's most popular smartphone. Google's Android is the world's most popular operating system, but Android is used in many different phones, and there's not one that sells more than Apple's iPhone.

Apple has sold more than 110 million iPhones around the world since it launched the product. Apple is expected to add Sprint as a U.S. sales partner with its new model.

According to the latest from the busy Apple iPhone 5 rumor mill, the new product will include a massive 1GB of RAM and a voice-control system known as the Assistant, according to a report TUAW. The tech news site quoted an unnamed source for the information, but cited the source as credible.

According to the report, Apple's new iPhone will come with the A5 chip, 1GB of internal memory, and an 8-megapixel camera.