I just tested with twilio as well. I was able to send this string: "secure communication" from within the twilio API, via pure SMS (no imessage, etc.) to an

I just tested with twilio as well. I was able to send this string: "secure communication" from within the twilio API, via pure SMS (no imessage, etc.) to an iphone SE with a US Mobile (verizon MVNO) sim card. Was sent from a US number to a US number. No issues.