Part leaks have previously suggested that the iPhone 6 has just 1 GB of RAM



From MacRumors:

New information suggests that the iPhone 6 Plus may not be getting a memory upgrade, and will continue to offer 1GB of RAM like the iPhone 6. A screenshot allegedly from an iPhone 6 Plus depicting what appears to be iPhone monitoring app System Status has surfaced on a Korean message board (via Phone Arena), showing the device's memory maxing out at close to 1 GB. Despite the size difference, the appearance of 1 GB of RAM in the iPhone 6 Plus seems to suggest that the two phones have nearly identical internal specifications, both offering the same A8 chip and memory. The larger iPhone 6 Plus does, however, have a larger battery due to its larger size and it also offers optical image stabilization, while the iPhone 6 is limited to electronic image stabilization features.

  iPhone 6 Plus Might Be Limited to 1 GB of RAM