I can not send txt messages a

Hello Marvin,
Can you please try to perform a quick reboot to your phone and after perform a manual network switch from it's settings menu and connect to Fizz EXT for 3 minutes then connect back to Fizz network and verify if this issue persists? Also, please make sure that your SMSC is properly configured as per:
https://fizz.ca/en/faq/i-cant-send-or-receive-text-messages
Have a good day.
Catalin