How to unlock my iPhone SIM?

Model: iPhone XR 128GB Red Cellular [A1984] [iPhone11,8]

IMEI: 35****296

IMEI2: 35****018

MEID: 35****329

Serial Number: F2****XL0

Warranty Status: Out Of Warranty

Estimated Purchase Date: 2019-06-30

Demo Unit: No

Loaner Device: No

Replaced Device: No

Replacement Device: No

Refurbished Device: No

Purchase Country: United States

Locked Carrier: 4000 - US Reseller Flex Policy

Sim-Lock Status: Locked

Make my phone sim free

sir

[Edited by Moderator]