When you install ACALL mobile, you will be asked for Username (your email) and Password to login.

How to check your login information

Username(Your email) and Password entered in ACALL mobile login screen are the same as the WorkstyleOS Portal login.

Reference
- 

Display the login screen after starting ACALL mobile

When you start ACALL mobile, you will see a Welcome message.

Slide through the slides, and tap the "Start" button on the last slide to display the login screen.

Enter your Username(Your email) and Password and tap [Sign in].

How to use ACALL mobile in English

Follow the instruction to change the language setting to use ACALL mobile in English. 

Tap the left bottom icon.

Tap the section shown in the picture.

Tap [English] to complete the process.