So I finally got around to updating my CM 10.1.3-d2vzw to CM 10.2 via the CM updater and now I am unable to use my phone to make/receive calls and the data drops in and out. I restored my working backup that I took before I upgraded and that did not fix the issue. I did some investigating and found that my IMEI is all 0's. I searched high and low on how to correct this but was unable to find anything. The last time I ran into this was when a bad CM update was released a few months back but was able to correct it by flashing MIUI and then back to CM but this time I was not so lucky. Any advice on how to correct this or do I need to Odin back to stock?