Heads up, but LTE broke in CM13-20160105 for me. Baseband still looks like correct radio (ends in .33), APN set correctly, as well as "Preferred Network Type". However, "Testing > Phone Info" will not let me switch to LTE. The option is there, but selecting any of the LTE options does nothing at all. No change, no radio cycle, nothing. It has been working in every nightly since the 12.1/13 switchover so far.
EDIT: Turns out I needed to re-edit build.prop. I have never manually edited build.prop, and usually rely on an all-in-one LTE script (which is currently not working with MM).
I went in, deleted LteOnCdmaDevice, and replaced with
Code:telephony.lteOnGsmDevice=1 ro.telephony.default_network=9 ro.ril.def.preferred.network=9
Went back to *#*#4636#*#* and swapped over to LTE/CDMA, and all is well. *wipes brow* Glad it was something simple.
This solution isn't working for me on the latest nightly. Are people still able to use LTE with the latest nightlies?