• Microsoft
  • Air Canada
  • Panasonic
  • Renault

When sending an SMS message, most mobile operators will return a notification called a Delivery Receipt to let the sender know whether or not the message was delivered to the handset. Some Short Message Service Centers (SMSCs) will return a delivery receipt when a message has been accepted or if the message is buffered in the SMSC, for example if the handset is switched off, although not ideal this is sometimes unavoidable due to operators restrictions.

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