PK (SIM PUK)
Specifies the PUK for unlocking a SIM. This is needed only if the wrong PIN was used and the SIM is locked out.
This command is write-only.
Parameter range
8 ASCII digits or space character
A value of a single space character (ASCII 0x20) acts as an empty value.
Default
0x20: A single ASCII space that indicates there is no PUK.