Eventhough the manual says that you need to have your midlet signed, the code you mention works for me without the midlet being signed. I also have firmware 5.11. I must say that I was suprised that...

unplugging and replugging, didn't work for me. But after rebooting the PC it works fine now, thanks for your help.

Jeff, did this solution for you work? I am facing the same problem.
I installed the 1.1.2.3 driver, but I didn't have the value ControlFlags in the registry. I added it manually to the location you...

It is version 5.11

Yes I used MFStandardConnection. I had the firmware upgraded to make it work.
If you also need a firmware upgrade try if your Nokia Service point can do it for you.
Note that using the...

The Increment function works correctly on the target (6131NFC), the problem only occurs when using the emulator in combination with the external reader.

When I use the mifare increment and decrement functions of MFBlock I get unexpected results when using an external Omnikey 5321 reader.
e.g. when the card contains the value 0 and I increment with...

The nokia 6131NFC has keys that are only know by Nokia.
Please read chapter 5.1 in the users guide, that came with the V1.1 SDK.
So you must either get hold of the unlock service midlet, or buy an...

Any idea where to get mobile phone software version 5.10 for 6131 NFC?
When trying to update with OTA I get a message that it is canceled by the server.