"To prevent fraud, verify your identity, and secure accounts, we may obtain information about your mobile service from your wireless carrier, such as your subscriber data (including mobile number, name, address, email, network status, customer type, customer role, billing type, mobile device identifiers (IMSI and IMEI) and other subscriber and device details)."
Kikoff obtains extensive device and subscriber information from your wireless carrier, including hardware identifiers (IMSI/IMEI), billing type, and other device details that go well beyond basic identity verification.