This morning, I received a slightly discouraging email from T-Mobile but not giving up just yet:
T-Mobile Sim Unlock Request
Sim Unlock Reference: *******
IMEI: ***************Thank you for taking the time to contact T-Mobile. We have forwarded your request to the manufacturer. These requests normally take 24-48 hours, but may sometimes take longer based on circumstances that are not under our control. Please allow 14 days before submitting a duplicate request. If no response has been received after 14 days, please submit a new request.
NOTE: Since T-Mobile is requesting an unlock code from the manufacturer we cannot guarantee the response time or that a unlock code will be provided.
Thank You,
Sim Unlock Department
T-Mobile USA, Inc.