MI3 doesn't see SIM card in Turkey

Jun 23, 2014
Hi guys,
I bought a MI3 from Shanghai and tested it with my SIM card(the one I am using in Turkey) and it worked fine. I bought a Huawei Honor 3X as well. They both worked in China but when I came back to Turkey MI3 didn't rercognise the SIM card as the other phone had no problem. Can anyone help me with this problem? I am new in the android world as well.
thanks in advance for all the replies...