unlock code for a Samsung Galaxy S5 SM-G900T


    I dont have a T mobile number,  I bought the phone on ebay, a year ago, it was factory unlocked, was working fine, but couple days ago, i powered off the device, and when turned on since then, is asking for a unlock code since the network lockeed the SIM, I dont live in USA, im trying to request in your page, but keeping asking me for a t mobile phone number I dont Have, please can you help me? I need the unlock code to use the phone

    imei 353682062038631/14 s/n R38F8199Z6L

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