Hey @ronp !
Welcome to the Community. 
Thank you so much for sharing this! Hopefully it helps some other members who are facing a similar situation.
Cheers. 
Hello Al060487,
Welcome to the community!
Firstly, have you verified that the phone has all of the compatible bands/frequencies for the networks? For some reason, I haven't been able to access the Umidigi websites. You can verify the compatible bands/frequencies here. You should note that since the device is not one Fido offers, it's likely that certain features like voLTE and Wifi-calling won't work.
You note that the APN cannot be altered. Which APN is the device using at the moment? If you cannot edit an APN, are you able to change it? While phone is LTE-capable, using ltemobile.apn would seem appropriate. You can verify those settings here. However, have you tried using fido-core-appl1.apn to see if you can send MMS? That APN might be more appropriate for your situation.
Your issue seems to stem from a relatively new security feature introduced in Oreo. Google has removed the ability to edit APNs with that update. Now phones rely on their internal database of APN settings. Unfortunately, that database is not always accurate. Other community members have similars issue with their unlocked phones (see here and here).
If you are able to switch the APN to fido-core-appl1.apn, that would be the simplest solution. For some reason, that APN seems to have the proper MMS settings in the database. While using that APN won't allow your phone to connect to the LTE networks, you service shouldn't be affected since you have a Talk and Text only plan. With the exception of voLTE and Wifi-calling, voice and messaging would transmit via the 2G and '3G' networks (note: Rogers intends to decommission the GSM (2G) network Dec 2020; see here).
In addition, you might consider disabling LTE on your device (ie setting your network to WCDMA/GSM or 3G/2G only). I'm not sure if disabling LTE would automatically switch the phone's APN to fido-core-appl1.apn.
If you are unable to add an APN or switch to a different one, your options are more limited (see here). You might consider contacting the manufacturer to see if they can edit the phone's apns-conf.xml file with the correct settings.
Hope this helps š
Cheers
Hello again,
I forgot to include earlier... Have you verified that data is enabled on the phone? While you don't need a data plan to send/receive MMS, the data setting does need to be enabled.
Hope this helps š
Cheers
Hello again,
Thank you for the additional information. Glad to hear UMIDIGI is trying to help.
Have you tried to use the Internet MMS 2 APN? While that APN is not the official one for Fido, some APN websites (see here and here) do list that one for Fido (possibly where UMIDIGI obtained their list of APNs for their internal database). Although those listings for that APN do not appear to contain the MMS proxy information, it might be worth a try to see if you can send/receive MMS using that APN.
Similar to the Fido-core-app1.apn, using that APN might not allow connection to the LTE networks. However, as mentioned above, your device wouldn't need to access the LTE networks for your services.
Have you tried to access the APN settings with the SIM removed? It's possible you might be able to add an APN if there is no SIM present. If you are, you could add an APN with the proper MMS settings.
Hope this helps š
Cheers
Hello again,
Thank you for the additional information. I also replied to your other thread here.
Are you able to view the actual settings for those APNs? I'm pretty certain that your issue likely stems from those APNs not containing the MMS settings. An APN which appears to be correct doesn't appear to be selectable.
Hopefully UMIDIGI will be able to provide an updated APN database for their devices.
Sorry we couldn't be of more assistance, but hope this helps š
Cheers
Hey @Rogerzreik,
Welcome to the Community.
Have you had a chance to try updating the MMS APN settings for your phone as described earlier in this thread?
