SMS to friends who delete signal don't arrive

[tgrrr]

Signal's great, kudos.

I'm using signal to manage my SMS.

Steps to reproduce

1. I message friends using Signal, it works
2. My friend uninstalls signal on iOS and Android
3. I delete all messages from my friend
4. I send a new message to my friends, or reply to their SMS
5. The message is delivered to their Signal account, not their SMS inbox
6. They don't get the message

expected action

• Detect when a user deletes Signal from their device
• Possibly email that user instructions if they change phones/no longer want to use signal
• Possibly provide an error notification to the sender
• Offer an option to send an insecure sms

[FeuRenard]

https://support.signal.org/hc/en-us/articles/360007321171-Can-I-send-SMS-MMS-with-Signal-#android_sms You can long-press the send button and then choose to send an insecure SMS instead.

[greyson-signal]

It can take quite some time for FCM to tell us a user has uninstalled the app. Long-pressing to send SMS is the short-term solution, and you can also direct your friend to unregister.