用*#8999*8378#打开之后在sim卡信息找到了一些字母
sst目录下:CHV1 ADN FDN SMS AOC CCP PLMNSEL MSISDN
EXT1 EXT2 SMSP LND CBM1 GID1 GID2 SPN SDN EXT3 VGCS-GIDL EMLPP AAEM DDCB DDPP MENU CC PROACT CBMIR BON EXT4 DCK CNL SMSR NIA AT_MOSM_C GPRS IMG 等等
cphs目录下:CFU CFB CFNRY CFNRC CT BOAC BOIC BOIC _EXHC BAIC BIC ROAM MPTV CUG AOV RREF GUG
等等,是什么意思?