Carrion

Automatically declines all calls failing STIR/SHAKEN verification.

What?

Ever receieve a spam call and try to call it back, only for it to be out of service or some stranger? This blocks that.

STIR/SHAKEN provides cryptographic attestation of caller ID and is mandated by law in USA and Canada

https://www.fcc.gov/call-authentication

https://en.wikipedia.org/wiki/STIR/SHAKEN

https://fccprod.servicenowservices.com/rmd?id=rmd_listings

Usage

Install the app, grant the screening perission, nothing more!

A call that failed verification will be disallowed and a failure notification shown

A call that is unsigned will be allowed and a notification shown

You can optionally choose to silence or block verification unsigned calls

A call that is verified will be allowed without any notification

Calls from contacts or emergency numbers are always allowed

Database Usage

For extra coverage and to enable functionality on devices without STIR/SHAKEN there is a local database lookup feature

Calls from numbers matched in the database will not be declined, but will be silenced

The archive database contains all numbers reported at least ten times in the past 360 data files

The high confidence database contains all numbers reported at least twice in the past 90 data files + the archive database

The "full" database contains all numbers reported in the past 30 data files + the high confidence database

You must manually download the database occasionally

The database function can be disabled via the delete database button

There is more information about the database here: https://www.ftc.gov/policy-notices/open-government/data-sets/do-not-call-data

Requirements

VoLTE must be working

Your device must have official support for Android 11 or higher

If seemingly all received calls are unknown/unsigned state, your device/carrier is likely incompatible

Device Compatibility

The below is not a guarantee, just a minimum requirement

Pixel 4 and newer

OnePlus 5 and newer

Fairphone 3 and newer

F(x)tec Pro¹ X

Known Issues

May fail to ask for screening permission, close the app and open until it prompts