The gsm messaging protocol does not have built into the spec read receipts or for the verification of successful delivery of text messages to the handset.
Just saying: it’s easy to sinkhole your stuff.
Perhaps, but if I message to another T-Mobile customer, I get notified my message was delivered and subsequently read.
If you’re using an iPhone, that’s the iMessage/APN protocol, which is not sms (and supposed to be encrypted from T-mobile’s point of view). I would be interested to hear if this indeed is the case. What application are you using?
I use stock Android and use the standard SMS app.
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