Sorry for the late reply. Finally got to test this iPhone XR with a Rogers SIM and guess what... it worked.
So to re-cap, I'm virtually positive this iPhone is NOT locked. It worked instantly with Bell and Rogers SIM's and 2 separate websites have confirmed this IMEI is not locked or lost/stolen. However 3 different PM SIM's do not work on this iPhone (but they work in my android phones).
@popping - I think you might be on to something with the link you posted. The article is a bit deep/techy, but I'm guessing my APN is incorrect. Apparently the APN I can adjust in my phone "is for the Personal Hotspot APN to obtain an IP address for cellular data connectivity of tethered devices (i.e. devices connected to the iPhone via USB or WiFi, and using the iPhone's cellular data). This is different from the APN used to obtain an IP address for cellular data connectivity of the iPhone itself. "
So I'm guessing the issue lies somewhere between my ASN not being correct and/or my Carrier Profile is out-dated/incorrect. IF I am correct, I'm not sure how to fix this. I tried the connecting to the computer via USB and logging into iTunes, but I didn't get prompted for any updates (and I have the latest iOS).
Thanks to EVERYONE so far. I'm open to any last suggestions or else I will have to create a moderator support ticket for help.
Well, unfortunately the dance still continues. I logged a ticket and a few days later I got an update on the phone to download a new Carrier Profile. Phone shows 41.0, so I think it's been updated.
However even with a Network Reset, re-inserting the SIM and updating to the latest version of iOS (13.7) it's still the same result.
What to do now?!?
I read you tried airplane mode....but did you try a soft reset in airplane mode? There is a known issue with your model of iPhone XR after updatingbto the latest software 13.7. Give this a go...
Allow your phone to re-establish all its wireless network connections. Once everything has stabilized, go back to Settings and turn on Cellular Data again to see if it’s already working as intended.
If the airplane mode soft reset doesn't work....heres your next option....
A major software update like iOS 13 typically comes with major platform changes. Along with these changes are new built-in system settings that are automatically installed on your device. While this isn’t usually a problem, things could turn out bad if there are existing settings or customization on your device that don’t compliment with the recent system structure. When this happens, various system errors can be triggered. To make sure that this isn’t ruining your phone’s network functions, particularly cellular data services, reset all settings on your iPhone XR. Doing so will remove all customized settings and then restore the original values. Any errors associated with some settings conflicts will also be rectified. Just follow these steps to get started:
After the settings are reset, your phone will restart automatically and then restores the original configuration on your device. To use necessary features, particularly those that are disabled by default, enable them individually. That also denotes the need for you to re-enable cellular data.
Still troubled with your iPhone XR cellular data that’s not working in iOS 13?
The workarounds listed above were generic solutions to address common errors affecting cellular services on your iPhone XR. If none of them works, then you may opt-in for stronger solutions like a factory reset, recovery mode restore or a DFU mode restore (if needed). These methods have already been proven effective in addressing fatal system errors, clearing out stubborn bugs including those that were inflicted by major updates. Should you wish to proceed, be sure to back up all your important files beforehand so you could still recover them later.
You can refer to a step-by-step guide on how to perform a recovery mode restore or DFU mode restore on an iPhone XR, posted on this site’s tutorials section.
For further assistance and official recommendations, escalate the problem to your network service provider. You can also ask your carrier to check your account and ensure that cellular data services are active. Also ask them to check on their outage boards. While the symptom has started from the recent update, it is also possible that a temporary network outage in your place is the underlying cause.
Finally, you can report the problem straight to Apple Support so that they can make necessary assessments on their end and confirm if this really is a post-update bug that needs a permanent fix.
*and the link for extra support : https://www.ikream.com/iphone-xr-cellular-data-that-is-not-working-in-ios-13-35235
Tried "Reset All Setting" and "Erase All Content and Settings". Same story... SIM card still not working.
Other than having a long date with Jack Daniels, WTF do I do now?!?!
I'll have one of those....on the rocks please. I'll do some more hunting....but maybe @LurganIeUk can help out since he's an apple guy and im an android girl. Lets see if theyve fixed this yet....you could talk to apple support canada as its a software update problem. If you can get back to f the one before 13.7 it should work....
Have a large one.....here are your options at the moment......
I'm guessing my APN is incorrect.
However 3 different PM SIM's do not work on this iPhone (but they work in my android phones).
@RyGirl, when you say they "do not work", what are the symptoms? Do phone calls in/out work? Does inbound/outbound SMS work? APN pertains solely to data, so I am gathering that everything works, but not data, but I can't be conclusive on this from the conversation thread.
To check your APN, while your PM SIM card is inserted, please look at this post, and follow the instructions outlined in option #2, and report back. Seeing the correct APN, and an IP address (or not) would provide guidance on next steps.