Unable to send txt message

[Ongy]

does anyone know why all of a sudden my iphone stopped letting me send text messages but I can received. 

[FidoNajat]

Hey @Ongy! We  would strongly suggest you get in touch with our Technical Support team so they can find out the root cause of this situation.
You can reach them either by dialing *611 from your Fido phone or via Live Chat as well.
 

[Original_Lucy]

Hi @Ongy , what phone do you have and are you using a stock app or a 3rd party app? If you're on Android,  try using the Google messenger app from the play store. If you're on iOS ,  I'm sorry but I don't know what to tell you. Sometimes just a restart can fix this.