For those who experiencing lost imei and baseband, fastboot flashing the factory image reset might save your day.
I lost my imei and baseband this mid night after uninstalling busybox 1.20.3-stericson from busybox free app, trickster mod free, and flash faux reset kernel, coming from faux beta 006b6 kernel.
Didn't have time to make a proper bugs report since the phone needed to fixed at the morning, primary phone here. Wiping cache from stock or cwm recovery, fix permissions, fastboot flashing bootloader-radio-boot-recovery images and wipe cache from stock recovery didn't help, event factory soft and hard reset didn't work out either. But not until i fastbooted flashing all the factory images reset restored my imei and baseband. Yay!
Learned the hard way. Hehe
Sent from my Nexus 4