> in many parts of the world, people frequently change devices and Sim cards. In these situations, we want to make sure people’s messages are delivered, not los

> in many parts of the world, people frequently change devices and Sim cards. In these situations, we want to make sure people’s messages are delivered, not lost in transit. That quote sounds even more alarming to me than the description of the backdoor. Because, as I read it: the unencrypted message is not stored on the device, but somewhere else. How else would they be able to still deliver a message, using a new encryption key, even after the sender switched to a new phone?