3 ms·

SMS supports delivery notifications, I think I've been using them for almost, if not 20 years I get a little display under the message saying 'delivered' in th

SMS supports delivery notifications, I think I've been using them for almost, if not 20 years I get a little display under the message saying 'delivered' in the standard android SMS app

vetinari 9y ago
That's another message that may or may not be lost, if it is checked at all. I've got my lesson about SMS reliability few years ago: I've bought a bus ticket via SMS, it was never delivered, but I got charged for it and the operator claimed that it was sent, when disputed. Except I've never received it, and couldn't ride the bus without it.
- blibble 9y ago
  > That's another message that may or may not be lost, if it is checked at all. that's a general problem with acknowledgements and is not specific to SMS TCP is exactly the same
  - hueving 9y ago
    But tcp detects this and recovers or explicitly kills the connection.
cbhl 9y ago
Sometimes carriers will send a "delivered" even though it only made it as far as a cell tower (and not an actual phone)