What is 4g iphone?

As an AI language model, I do not have access to the latest information or updates about technology, but I can share some general information about 4G iPhone:

A 4G iPhone was introduced by Apple Inc. in 2011. It was the company's first smartphone designed to be compatible with the 4G mobile network, which offered faster data transfer speeds and improved connectivity compared to previous generations. The 4G iPhone featured a larger 3.5-inch display, improved camera quality, and a faster processor. It also included new features such as Siri, a personal assistant application, and iCloud, a cloud storage and synchronization service for Apple devices. The iPhone 4S was the last phone to have 4G capability. Since then, Apple has introduced 5G-capable iPhones.