It’s erroneously possible to start the ringing/calling process for a user who doesn’t have signal

[brandoncote]

• I have searched open and closed issues for duplicates
• I am submitting a bug report for existing functionality that does not work as intended
• This isn't a feature request or a discussion topic

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Bug description

Using iOS Phone app to start a signal call causes a signal call (or the full UI/ringing process) even if the contact isn’t on signal

Steps to reproduce

• open system Phone app
• open the contact card for a contact you know does not have signal
• hold down on the second button (usually says Call; has picture of a phone)
• Select signal

Actual result: signal app opens and begins a “call” with a contact that doesn’t even have signal

Expected result: display an error to the user such as “contact is not a signal user”

Screenshots

Device info

Device: iPhone 12

iOS version: 18.1

Signal version: 7.34

Link to debug log