My Nexus 5X has stopped being able to receive SMS messages. Every time I'm supposed to get a text, I instead see a notification: "SIM card storage is full -- No more space for SMS messages on SIM card. You may need to delete some messages."
I have never configured the phone to use SIM card storage (don't even know of such an option). When I click the notification, I see an empty list titled "SIM card messages" in Messenger.
I'm currently traveling abroad and roaming (Sprint subscriber on Chunghwa). Sprint was having an outage with international roaming for several hours; it just came back on and the problem started soon thereafter.
Running latest version of Android N.