Apple’s next iPhone will feature 1GB of RAM, as well as a Siri-powered Assistant feature that will be exclusive to the device, according to a new report. Citing a source familiar with the iPhone’s microprocessor manufacturing, 9to5Mac reports that these features will arrive alongside previously-rumored upgrades like an eight-megapixel camera, a dual-core A5 processor, and a Qualcomm Gobi baseband chip that will allow a single model to…