The first 6 digits (898600): it is the code name of China;

7th place: service connection number, corresponding to 5, 6, 7, 8 and 9 in 135, 136, 137, 138 and 139;

8th place: the function bit of SIM card is generally 0, and the current stored value SIM card is1;

9th digit and 10 digit: province code;

Numbers 1 1 and 12: year number;

Bit 13: supplier code;

Bit 14— 19: User ID;

20th bit: check bit.