As tourists we but a prepaid line from this cell phone company.
We had Greek tour, so we go to the ERGENEKON street branch
To active the international service,
then they charge us and said you all set.
The service it didn't work on Greek.
Unfortunately when we missed our tour guide we couldn't able to connected with hime,
Which is we paid for it.
After we backed we go to the branch and asked for refund but they rejected us