how does international sim card work
How it Works. Insert The SIM Card. Turn your phone off, open the battery housing (located in the back of your phone), remove the existing SIM Card (if applicable), and insert your Global SIM Card. Store the existing SIM card in a safe place.Turn the phone back on.ake and receive calls or text messages while traveling abroad can be very expensive. To help curb this expense, United World Telecom has introduced an exciting mobile solution: the Global SIM Card. The Global SIM Card is a small chip that you insert into the back of any unlocked GSM phone.