Netherlands Phone Card How Can I Unlock An I9 Mobile Phone And Use It In Netherlands I.e. With Tmobile Network?

How can I unlock an i9 mobile phone and use it in Netherlands i.e. with Tmobile network? - netherlands phone card

There is a phone, i9. It was purchased online and shipped to the United States. While in the United States was working perfectly with the TMobile network. However, the Netherlands, it does not work, even with TMobile. Should I unlock it? Is this a problem with SIM cards? Is the service provider? How do I use a phone i9 in the Netherlands? What should I do?

Thank you in advance for your reply.

Martin