Answered question
I use iphone 6s. Used to be with Rogers and then chatr, work fine with picture sending over SMS. Switch to Fizz now, but I can't send and receive pictures. Can't find a phone number to talk to any people. Very frustrated.
You need to follow these steps as per Fizz's FAQ
https://fizz.ca/en/faq/what-are-fizz-network-settings-apn
Also this seemed to help in my case. Manually edit both APN settings to change "APN protocol" and "APN roaming protocol" to "IPv4/IPv6"
Data has to be turned ON to send or receive MMS.
Other answers
You need to have a plan with data to send and receive mms. If you have data in your plan, then your APN probably hasn't been configured properly.
This is likely an issues with your APN settings, please verify they have been entered correctly and you didn't mistype a dot for a comma. Then reboot your phone and test again and it should work as long as the settings are correct.
Fizz APN settings are:
APN: mobile.bm
MMSC: http://mms.mobile.bm
MMS proxy: mmsproxy.mobile.bm
MMS port: 80
APN type: default,mms,supl
Hello N,
In order to be able to send and receive MMS you will need to have a data plan and unlimited messages.
-Bogdan