Apple's all-new foldable iPhone Duo will be available to pre-order starting on Friday, October 16 at 5 a.m. Pacific Time, and the device will be released on Friday, October 23, in the U.S. and more than 70 other countries and regions, including Australia, Canada, China, France, Germany, India, Japan, Singapore, the U.K., and others. In the U.S., pricing…