According to members of this forum, there is new firmware for SARA-N2 series (SARA N2 production firmware: U06_57_A07.03_IP). It is also stated that there is CoAP support. This is something that I think a lot of members will find very useful.
However, this new firmware is nowhere to be found at ublox site and it seems that ublox doesn’t provide firmware upgrades at their site.