MESSAGE('Please note that these tests will fail if SIM card does not allow price or currency settings!')

COM AT+CPUC: Price per unit and currency table
AT+CPUC=?
WAIT FOR OK

COM Write stupid value...
MESSAGE Changing Price per unit. Please verify that PIN2 is '1111'! Press OK when ready.
AT+CPUC="SFR", 1.23, 1111
WAIT FOR OK

COM read previously written value
AT+CPUC?
WAIT FOR +CPUC: "SFR","1.23"

COM try to write invalid currency (length>3)
AT+CPUC="ABCD", 1.23, 1111
WAIT FOR ERROR

COM write without PIN2
AT+CPUC="ABC", 1.23
WAIT FOR ERROR

