Updating thread.
Straight talk, net 10 and tracfone now have official unlocking policies.looks pretty restrictive !!! But it's a policy now
TracFone Wireless, Inc. Unlocking Policy
If you bought a new wireless phone from TracFone Wireless, Inc. (“TracFone”

, including any new TracFone, NET10, Straight Talk or Telcel America branded wireless phone (“device”

, it may have been programmed with a lock that prevents it from operating with other compatible wireless services. TracFone will facilitate unlocking your device upon request provided that you have met the requirements set forth below:
General Eligibility Requirements for Unlocking TracFone Mobile Devices
TracFone will facilitate the unlocking of a TracFone device under the following circumstances:
The person requesting the unlock must be one of the following:
a current TracFone customer who provides the IMEI/MEID serial number of the device
a former TracFone customer who provides the IMEI/MEID serial number of the device
The TracFone device was first introduced for sale on or after January 1, 2014.
The TracFone device has been in service for at least 12 months with paid, verifiable airtime.
The TracFone device has not been reported lost or stolen.
The TracFone device is deemed by TracFone to be capable of being unlocked.