Javacard applet RPDU does not contain any data when accessed from seek-for-android

Question

I have a complex Javacard applet, which is developed and tested for ordinary Smart Card (e. g. NXP J3E145, T=1). Now I have to use it in UICC in a mobile phone and access it fro

Answer 1

I found an error in my applet, which really caused the whole issue. My applet responded with status word 0x911C and no data. However, SEEK returned always 0x9000 instead of 0x911C, because status words 0x91XX cannot be used when accessing via SEEK. Next paragraph is by EduardEtc from the SEEK forum and it explains everything:

"ETSI defines (in TS 102 221) status word 91XX for use with SIMToolKit (CAT) applications . Any card application that would otherwise send 9000 as SW1SW2 can return 91xx instead which the phone must interpret to handle CAT APDUs. So the phone application will never see the 91xx, it is replaced by the phone’s CAT handling layer by 9000. ISO/IEC 7816-4 defines SW1SW2=61xx for a similar purpose. At the time this included in the standard to meet a need from ETSI, however, ETSI didn’t wait for the ISO process to finish and specified a different encoding."