Turkcell Roaming Does Not Work in the United States

I am a Turkcell postpaid customer, and my Turkcell line does not work in the United States. I have traveled to the U.S. approximately 8–10 times so far, and I have experienced the same problem every time. Whenever I arrive in the United States, my phone has no service, cannot find a network, and my line becomes completely unusable. During this time, I cannot make calls, send SMS messages, or use mobile data.

The problem usually cannot be resolved until about a week later, after I have sent numerous emails and repeatedly contacted customer service. Each time, I remain unreachable for days and experience serious inconvenience. Based on these repeated experiences, I cannot recommend using a Turkcell line in the United States.

I am currently in the United States again and am experiencing the same problem once more. I request that this network coverage and international roaming issue be permanently resolved, that my Turkcell line work without any problems from the moment I enter the United States each time, and that I receive written information about the steps taken to resolve the issue.