Also, since you are porting a number over from another provider, have you verified that the number was already deactivated on the other provider's network? Do you still have service for that phone number on your old SIM card? Once my number was deact...
I assume you're following this guide? I'm not sure if it's a mistake in the guide, because I think the APN settings are supposed to have both "MMSC" and "MMS Proxy" fields as you say, not a field called "MMSC Proxy".Try setting up your APN with:MMSC ...
