IPhone imitates my expression without sound.

You can open the appstore, and there are updates in the lower right corner. Just update it.

Apple's setting of mimetic expressions needs to be set in the short message mimetic expression interface. 1. In the SMS interface, click Imitation Expression. 2. Click the plus sign in the mimic my expression interface. 3. In the expansion with the plus sign, click Start Using.

IPhone is a smart phone developed and sold by American technology company Apple. It is equipped with the iOS mobile operating system developed by Apple. The first generation of iphone2G was released on June 9, 2007 by Steve Jobs, then CEO of Apple, and officially released on June 29 of the same year. The 10th generation iPhone7 and iPhone7Plus were released on September 8th, 20 16, Beijing time.