Remote SIM Access
The Nexus 5 is supported by the installer app starting with version 2.4.3. It uses the generic Qualcomm system files, so there are no restrictions for the SIM access.
The update to Android 4.3 installs a new radio software which is no longer working out of the box with the rSAP app. Check http://www.android-rsap.com/41-support/ ... ccess.html how to enable rSAP on newer firmware versions.
The Nexus 5 uses the latest AOSP Bluetooth stack. It still ignores the "Filter" parameter and has problems with "work", "home", ... mail addresses.
The Nexus 5 is compatible with the Phonebook Access Profile (PBAP) of my Bluetooth Phonebook app.