Here we are... one step further... :) Air encryption: 1, thisth is means that we have encryption tetra network? TEA1 i guess... So that's it? If is encryption 1, i can't use speech decoder for voice, right? Thanks. Regards. BURST CRC COMP: 0x1d0f OK SB1 58/05/3/000 type1: 001000001111001011110100000000001001001010000000000011111001 TMB-SAP SYNC CC 000011(0x03) TN 11(3) FN 00101( 5) MN 111010(58) MCC 0100100101(293) MNC 00000000000111(7) TMV-UNITDATA.ind 58/05/3/000 BSCH CRC=1 SYNC TMV-UNITDATA.ind 58/05/3/000 AACH CRC=1 ACCESS-ASSIGN ACCESS-ASSIGN PDU: DL_USAGE: Unallocated UL_USAGE: Unallocated CRC COMP: 0x1d0f OK SB2 58/05/3/000 type1: 1000111010100100001111000000110001100110100100000000000000001101100000100000000000000000101000001111111111111101110101110111 TMV-UNITDATA.ind 58/05/3/000 UNKNOWN CRC=1 BROADCAST BNCH SYSINFO (DL 393712500 Hz, UL 383712500 Hz), service_details 0x0d77 CCK ID 0 Advanced link: 1 Air encryption: 1 SNDCP data: 1 unknown 0x8: 0 Circuit data: 1 Voice service: 1 Normal mode: 1 Migration supported: 0 Cell never uses minimum mode: 1 Priority cell: 0 De-registration mandatory: 1 Registration mandatory: 1