Unlock code for Lumia 810

Hi T-Moblie,

Last month, my friend in US give a Lumia 810 as a gift. Unfortunatly, it is locked by T-Mobile so that i can not use it in VietNam.

So, can you provide to me the unlock code to unlock my phone?

My phone imei is: 354591050896018. I am looking forward to hearing from you soon,

Thanks!