I have a ATT sim card for a GSM modem that I am useing with a Zelio smart relay . My problem is I don't know which number is what. I know the sim card number is the ICCID # /I am not sure which # is the server # / or the sim card pin code. The card has
a UPC #and a SKU # / along with a RS#
a UPC #and a SKU # / along with a RS#