Cyanogenmod no service?

I had cm-11-20150517-NIGHTLY working, then upgraded to cm-11-20150607-NIGHTLY. Now I get the error "No service" and have basically no GSM functionality whatsoever. If I attempt to select a network operator, I get the error: "Error while searching for networks." I installed this using TWRP, there were no issues with the install. Automatic upgrade failed, I believe this is due to an encrypted file system, something which TWRP does not handle. What I have tried: Rebooting by itself. Removing the USB cable and rebooting (apparently this was a known issue before). Reverting to cm-11-20150517-NIGHTLY, this does nothing, same problem. Resetting APNs to default. Device: GT-N7100, CyanogenMod version: 11-20150517-NIGHTLY-n7100, Android version: 4.4.4