Ⅰ.By using App Store
Step 1 : Start App Store in your mobile.
Step 2 : Launch search function, then enter SMMS in search box. In search result,please click on “Free”.
Step 3 : Click on “Install App” to install.
Ⅱ.By scanning the QR code
Step 1 : Scan the QR code with your mobile.
Step 2 : The scanned result is a link as the left screen shot, please click on the link to access App Store directly. Click on “Free” to show the button of “Install App”.
Step 3 : Click on “Install App” to install.