Detectorcatty A1 Professional Smart Wrist Watch 2G SIM TF Camera Waterproof GSM Phone Large-Capacity SIM SMS for Android for iPhone

hey it's rokosz your digital lifestyle expert here talking about sim chips what are they and how do you use them well let's first off by talking about what a sim chip is it's this little guy here there used to be the size of a credit card now they're 80 bitty little things and on it is actually a small chip a little brass chip and it stores information it's a storage your subscriber information in fact it's the SI M stands for subscriber identity module and all you need to know is it's a portable memory trip that stores the information about you as a cellphone user it's made up of the code first three digits of the code is the country code of origin second two are the system carrier origin so AT&T Verizon they've got their own I their own ID and then the last seven is your unique user code and that's how they can attribute everything to your bill that's muy importante and track their ph