Do Not Send Read Receipts

T mobile refuses to give out even the most basic details. A bug in io s causes apples messages ap to intermittently forget not to send read receipts. And apparently rerooting the phone makes it not happen for a while, but then it might happen again. Neither of them are catastrophic, set your hair on fire, but i think it's important to know about them in case you need to tweak your behaviour for a while.