SIM card what is the use negative numbers?

Users questions: Thank you friends for help. Back of the card is not 20 digits, only 16 digits, each 4 ranked number 4 in a row. I feel it contains anything which is not password?
Experts answer:SIM card numbers are explained as follows: China Mobile: If, after sub-89860079090449311287 String meaning as follows: 8986 00 behalf of the state on behalf of the Chinese operator China Mobile (like 02 too?) 79 on behalf of the third of four phone numbers, so card issuers on behalf of 09 provinces in 1379 **** number, the code is as follows, in order to China Mobile's internal use, only accurate to the provincial ** ************************ 01: Beijing 02: 03 Tianjin: Hebei 04: Shanxi 05: 06 Inner: Liaoning 07: Jilin 08: Heilongjiang 09: Shanghai 10: Jiangsu 11: Zhejiang 12: Anhui 13: Fujian 14: Jiangxi 15: Hill East 16: Henan 17: 18 Hubei Province: Hunan 19: Canton 20: Guangxi 21: Hainan 22: Sichuan 23: Guizhou 24: Yunnan 25: Tibet 26: Shaanxi 27: Gansu 28: Qinghai 29: Ningxia 30: Xinjiang 31: Chongqing 35 : Guangdong another: 13800138000 charge Value of the password at the beginning of the two cards, serial numbers 6,7 are both number 04 with the representatives of this province (system) card the year 2004 a representative of the manufacturer, the code below *********** *************** 0: Dutch Axalto (Axalto, Schlumberger Thank Schlumberger subsidiary) 1: French Business Tianjin Gemplus (also translated Bowker, English GEMPLUS, the contact point on the chip have GEMPLUS mark) 2: German Business Oujia (ORGA, Wuhan days after the code replacement Yu ) 3: German Jiang Xi Jiede 4: Zhuhai Eastcom Peace 5: DMT 6: Beijing Aerospace Kyushu through 7: Beijing Watchdata 8: Beijing Oriental English Card 9: Beijing Hua Hong A: the Hai Kesi (Schlumberger joint venture) B: After the Beijing Aerospace Z-Tone 7 is unknown, more casual , sometimes the same phone number the last number of bits of China Unicom: If 8 After the meaning of section 986010405021063908S string as follows: 8986 01 behalf of the state on behalf of the Chinese operator China Unicom (CDMA is the other 03) 04 representatives (system) card 05 years in 2004 on behalf of the third of four phone numbers, so card 13 05 **** 021 area code on behalf of issuers, such as Shanghai 021, Hangzhou 571 ... ... can be more accurate to city free after 6 S on behalf of the manufacturer, the code below *************** ********* A: Beijing Orient British Card B: French Business Boolean company (has been Schlumberger acquired) C: on the Hai Kesi D: French Business Shenzhen Oberthur E: Zhuhai Eastcom Peace G: French Business Tianjin Gemplus H: Beijing Hua Hong S: Dutch Axalto T: Datang Microelectronics W: Beijing Watchdata Y: Wuhan days Yu J: German Jiang Xi Jiede China Netcom 898 696 005 01000062586 8986060055150005052496 as Netcom China Telecom for the telecommunications code 005 code 06, said in 2005 were 010 and 515 area code. Some cards have a letter back, it is estimated that vendors code, rules may be with China Unicom The same.
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