Hi @allanang03, is your phone not showing any network signal? Another reason that you are not receiving SMS because the SMS barring might be activated. Please dial this mobile short code #35*Password*16#SEND to clear the barring setting. Reboot your handset after dialing the shortcode thereafter ask someone to send you a message to see if you can now receive an SMS.
The default password is 1234 but if you have changed it I don't have the capacity to help you with that so I suggest that you contact our Customer Care Support team instead.