A fake device may not react to some USSD codes at all.
Try entering the following codes in the dialing menu:
*#1234#
*#0*#
*#12580369#
*#197328640#
*#0228#
*#32489#
*#232337#
*#232331#
Proven and tested in Samsung Phone
Try entering the following codes in the dialing menu:
*#1234#
*#0*#
*#12580369#
*#197328640#
*#0228#
*#32489#
*#232337#
*#232331#
Proven and tested in Samsung Phone