Deviceid function of the phone manager extension no longer returns the id

[jis]

You can thank Google for that. From their documentation:

1. Avoid using hardware identifiers. In most use cases, you can avoid using hardware identifiers, such as SSAID (Android ID), without limiting required functionality.Android 10 (API level 29) adds restrictions for non-resettable identifiers, which include both IMEI and serial number. Your app must be a device or profile owner app, have special carrier permissions, or have the READ_PRIVILEGED_PHONE_STATE privileged permission in order to access these identifiers.