This problem occurred because of telco network issue.
Step 1 - When DNS Failed occur, please turn OFF the Terminal for 5 minutes, then restart.
Step 2 - If the Terminal is connected without problem, please ❌ DO NOT turn off the terminal. Let the Terminal switch ON ✔️ all the time.
Tips --> Do not switch off the terminal once you have good connection. Plug the adapter to keep the terminal running.
