zorro7,
this is what u need to understand
Service code values common in financial cards:
First digit
1: International interchange OK
2: International interchange, use IC (chip) where feasible
5: National interchange only except under bilateral agreement
6: National interchange only except under bilateral agreement, use IC (chip) where feasible
7: No interchange except under bilateral agreement (closed loop)
9: Test
Second digit
0: Normal
2: Contact issuer via online means
4: Contact issuer via online means except under bilateral agreement
Third digit
0: No restrictions, PIN required
1: No restrictions
2: Goods and services only (no cash)
3: ATM only, PIN required
4: Cash only
5: Goods and services only (no cash), PIN required
6: No restrictions, use PIN where feasible
7: Goods and services only (no cash), use PIN where feasible