Why doesn't iPhone provide delivery reports for regular SMS (non-iMessage)?
I understand that iMessage has delivery and read status, but regular SMS is still widely used, especially when communicating with Android users.
Even many old non-smart mobile phones had an option to request an SMS delivery report. Why doesn't iPhone offer the same option for regular SMS?
Is there a technical limitation, or is this simply a feature Apple has chosen not to provide? It would be very useful to know whether a regular SMS was actually delivered to the recipient's device.