Q: I have my new iphone and put my old sim card. It works fine on a day and after another day, it kept saying that no service. Does it nean i need to have new sim card?

Q: I have my new iphone and put my old sim card. It works fine on a day and after another day, it kept saying that no service. Does i ... I have my new iphone and put my old sim card. It works fine on a day and after another day, it kept saying that no service. Does it nean i need to have new sim card? more