TCL's prototype phone folds open to become a 10-inch tablet - Android

We've seen the Samsung Galaxy Fold, already released, with its inward folding screen that opens up to produce a 7.3-inch display. Expected to be released later this month is the Huawei Mate X with its outward folding back and front displays that open up to form an 8-inch screen. And while we've seen Xiaomi's prototype that featured a phone with a double-folding screen, today CNET reports that TCL has been demonstrating a non-working prototype of a tri-fold smartphone.

The company, which produces BlackBerry phones like the Key2 and Palm's small phone under license, ...