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Sign up for any random SMS API service. You'll note that you can send SMS using anything you like as the 'from' field. There's no checks or restrictions. Same g
by 6nf 8y ago
Sign up for any random SMS API service. You'll note that you can send SMS using anything you like as the 'from' field. There's no checks or restrictions. Same goes for voice calls in most cases.
- metildaa 8y agoWhich ones actually support this? From what I've tested, T-Mobile and Verizon will both fail to deliver SMSes that aren't originated by the carrier listed in the SMS routing for a phone # (which is wholly separate from the PSTN routing of a number, and can be a source of problems when changing cell carriers).
- 6nf 8y agoI'm using the noname brand resellers, not the carriers themselves. I guess that's why.