To Begin Activation, Enter Your SIM Card Number. To activate your new GoPhone service, enter your AT&T SIM card number and select Continue. SIM Card Number. The SIM card number begins with the numbers 89 and consists of 20 total numbers. An example of a SIM card number is '89012345678987654321'.o activate your new GoPhone service, enter your AT&T SIM card number and select Continue. SIM Card Number. The SIM card number begins with the numbers 89 and consists of 20 total numbers. An example of a SIM card number is '89012345678987654321'.
Kefir contains around 12 milligrams of magnesium per 100 grams, or about 3.5 fluid ounces of the drink. It is also a good source of vitamins B-1 and B-12, biotin, calcium, folic acid, vitamin K and phosphorus.
1 The bacteria and yeast in kefir -- unlike those in yogurt -- can actually colonize your gastrointestinal tract and stay there for a long period of time.  Research has found that kefir contains kefiran, a polysaccharide associated with lower blood pressure and cholesterol in animal studies.