Not happy with fido right nowMMS is not working properlyAnd texts are not sendingI have to send it twice???
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Did you get your S6 from Fido and are you using the default messaging app or a different one?
If your phone is a Fido phone can you try disabling VoLTE and see if the problem goes away if not try disabling LTE and see if it makes a difference.
Did you get a chance to test out KAPABLE-K's suggestions, did any of them make a difference? Let us know, it could help others on the Community