Ask HN: Is there anyway to send SMS to your phone without using Cloud APIs

Yep. Look up one of the many libraries that let you use your Android as an SMS gateway.

e.g. https://pypi.org/project/asms/

Email.

https://20somethingfinance.com/how-to-send-text-messages-sms...

Is the question asking whether you can send SMS without using any cloud API (eg. Twilio, MessageBird), or even without using API from hardware SMS gateways?