Apple Inc. said on Tuesday it would hold a special event on Sept. 14, which most industry watchers believe will be used to unveil a new line of its flagship iPhones. Since 2013, Apple has delivered new iPhones around September like clockwork. The tech giant, which launched a redesigned iPhone with 5G connectivity last year, is not expected to make radical changes this year, with most analysts pointing to small technical updates to the phone’s processor and camera system. “Upgrades rates peaked in 2021 on 5G, we expect upgrade rates to moderate but still drive high volumes in 2022,” J.P.Morgan analyst Samik Chatterjee wrote in a note, adding that he still expects a record year thanks to higher sales of the lower priced iPhone SE. The new line of smartphones are expected to expand the Portrait mode feature to video and also have higher-quality video recording format, according to a …