Cellular Network Infrastructure » osmo-ePDG - VoWifi Evolved Packet Data Gateway

We didn't implement anything IMEI related yet, grep for "IMEI" in TS 29.273.

For instance:

Specific operator policies may be configured for emergency services, regarding whether to check the IMEI and, if the
IMEI needs to be checked, whether to continue or stop the authentication and authorization procedure upon getting the
IMEI check result or when the IMEI(SV) is not available.