For the USIM/ISIM/CSIM test cards (of type SMAOT), with SQN disabled, the SQN file is not present at all. By creating SQN and a Delta file you should be able to activate the SQN functionality.
I have two commands for creating the two files below. This has not yet been verified, but please test if you have the possibility and the need. Execute these commands in 2G mode. And of course, please verify ADM codes before trying to send the APDU commands below.
APDU command to create the SQN file
APDU command to create the Delta file
Created : 2016-04-29 10:26:19, Last Modified : 2016-05-30 13:31:26