I have a third party unlocked GSM phone.<BR>I want to use it with a pre-paid plan.<BR>I'm considering Virgin Mobile as my option,<BR>since their rates are good and I can easily<BR>buy top-off cards.

SIM cards have been an integral yet forgettable aspect of owning a smartphone over the past few decades. For most users, the SIM card defines the basic commercial relationship they have with their ...