• Part 1: Undelete lost data from S17t (on macOS)
• Part 2: Undelete lost data from S17t (on Windows)

Step 1:  Download and launch the Android Data Recovery on Mac
Download and install the Aiseesoft FoneLab Android Data Recovery for Mac in your Mac computer, when you open it, a dialog box will pop up to remind you whether to register, purchase or free try.
Note: You can free try this software in 30 days

Step 2: Connection
Run this powerful Android data recovering software on your Mac computer, and then connect your Vivo S17t device to computer via the USB cable. The program will detect your device automatically.

Step 3: Enable USB debugging.
Android Data Recovery will prompt you to enable USB debugging on your Vivo S17t if you don’t open the debugging mode. The program will detect the version of your Vivo S17t device automatically and give you the instruction of opening the USB debugging mode on your S17t. After finishing the operations on your phone, click “OK” button.

Step 4: Select the messages you want to recover.
After connection, all file types on your Vivo S17t will be showed in the interface. Choose the file types you want to recover, such as contacts, messages, messages attachments, call logs, photos, gallery, picture library, videos, audios and other documents. Check the file types you want to recover and click Next. The program will scan your device automatically.

Step 5: Recover Vivo S17t messages
When the scanning is finished, all types of files will be listed in categories on the left control. You are allowed to check the detailed information of each data. Preview and select the data you want to recover, and then click “Recover” button to complete recovering process.

Step 1: Download and launch the Android Data Recovery
Download and install the Android data recovery tool in your Windows computer, you can free try this software in 30 days.

Step 2: Connection
Connect your Vivo S17t device to your Windows computer via the USB cable. Wait for seconds before the device is detected. Install the device driver on your computer if it hasn’t been installed.

Step 3: Enable USB debugging.
Allow USB debugging when your Android prompts you of USB debugging permission. After finishing the operations on your Vivo S17t , click “OK” button.

Step 4: Preview and recover the lost data.
Soon, all Android available files will be classified into category on the left. You can toggle the button of “Only display the deleted item(s)” to “On”, so that you can quickly find the wanted Android file. Click “Recover” button and choose a destination folder to recover files. Within seconds, you can navigate to the file folder and check your deleted files from Vivo S17t.