I developed a J2ME application last year running on a Nokia 6131 NFC phone to demonstrate the NFC capabilities of the phone. Firmware version was v05.11 (initially v03.12 but the NFC API was not fully implemented on that firmware version - The phone was then upgraded to v05.11).

I recently bought a new Nokia 6131 NFC phone which is now provided with a new firmware: v05.12. My application is still running on it but is not able to perform any operations using the NFC connectivity: Tag reading, P2P communication, interaction with our NXP NFC reader...

Are some of you aware of changes that have been done by Nokia on the NFC API between the 2 firmware versions? I would need to solve this issue as soon as possible.