I have a device (XT107) that requires a SIM card. It takes a SIM card that have cobber plate (not sure what to call that) that supports all 8 curcuits on the device.
When speaking with people, some say it's a 2G SIM card, but I doubt that since some of my friends have a HTC Desire which uses this kind of card.
Mini sim card - 4 pins - (8 circuit):
Mini sim card - 3 pins - (6 circuit):
What are the differences between these two cards above? I'm really lost here. I need that one with 4 pins(8 circuit), but when speaking with the mobile phone companies' tech support, they are totally lost.
I have added the real names for the simcard to the above, but still maintain the original question with names etc.