which service should i take to unlock my iphone 5s

which service should i take to unlock my iphone 5s?

Model: IPHONE 5S SILVER 16GB GSM
IMEI Number: 013968006872504
Find My iPhone: OFF
Blacklist Status: CLEAN
Estimated Purchase Date: 11.01.16
Coverage End Date: 10.01.17
Product Sold by: TRACFONE WIRELESS
Initial Carrier: US Straight Talk Activation Policy
Purchased In: US – United States
Simlock: Unknown