Huawei may be developing a foldable phone featuring an attached cover, according to a patent document. It might feature a tri-fold design, with the outermost panel serving as a protective cover when it is closed. Here’s everything you need to know about Huawei’s latest smartphone patent.Huawei may be developing a foldable phone featuring an attached cover, according to a patent document. It might feature a tri-fold design, with the outermost panel serving as a protective cover when it is closed. Here’s everything you need to know about Huawei’s latest smartphone patent.