Huawei's second tri-fold phone debuts September 7, but nearly 20 years of U.S. restrictions keep it off American shelves.

A new foldable iPhone and the Mate XT 2 are coming as analysts predict a double-digit plunge in smartphone shipments this year.

Huawei opened preorders for its Mate XT2 tri-fold smartphone on Aug. 31, ahead of an official launch event scheduled for Sept. 7. The company began