# I. Introduction

- [1. Register a new account](/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/en/i.-introduction/1.-register-a-new-account.md)
- [2. Log in - Log out](/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/en/i.-introduction/2.-log-in-log-out.md)
- [3. Change user information](/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/en/i.-introduction/3.-change-user-information.md)
- [4. Making outbound calls](/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/en/i.-introduction/4.-making-outbound-calls.md)
- [5. Receive inbound calls](/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/en/i.-introduction/5.-receive-inbound-calls.md)
- [6. Actions in the call](/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/en/i.-introduction/6.-actions-in-the-call.md)
- [7. Account Status](/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/en/i.-introduction/7.-account-status.md)