[HTC Droid DNA] pyroguysf:
Radio/Reception Problems on the DNA?

First things first- Double check your settings in Settings > More > Mobile networks. They should be as follows:

Data Enabled: Yes

Data Roaming: No (unless you're actually roaming)

National Data Roaming: Yes (otherwise you'll probably lose data; this won't get you any roaming fees)

Network Mode (Verizon): LTE/CDMA/EvDO (or Global, which is everything, I've never noticed any difference between the two)

Network Mode (GSM): GSM/WCDMA preferred (depending on the ROM, you may also need to flash the GSM patch courtesy of Flyhalf205 from the 2nd post in the original CM10.1 thread.)

System Select/CDMA Roaming: Automatic

CDMA Subscription: RUIM/SIM

GSM users may also need to manually enter APN settings for your carrier to get things like MMS functioning properly. I'm not going to compile a worldwide list, but if Google fails you, your carrier should have support documentation with these settings. Recently, I noticed this file in the android source lists tons of APNs, so try finding your carrier in there too.

Why do I have 0-1 bars? I got a lot more on Sense

Don't be alarmed if your reception looks low/non-existent. Sense "pads" the signal bar to get it to show bars more "accurately," but AOSP does not, so expect a drop in bars. To get an accurate assessment, you want to be looking at your actual signal in dB before trying to diagnose anything by going to Settings > Interface > Status Bar and changing Signal Status Style to Text, and your signal bars will be replaced with a negative number, therefore a value closer to zero indicates a stronger signal. If you don't like negative numbers, another way of thinking about this is as if the phone was telling you how far you are away from the nearest tower. What would normally be 5 bars on Sense equates to -70dB, and 1 bar equates to -115, but these are approximate values and depending on your location and environment, you might bee numbers outside this range.

I'm still having problems

Unfortunately, our phone is known to have problems with reading the SIM card. Some say it's purely software, some say its purely hardware, but I believe it can be either. I'd first suggest giving your SIM card a cleaning by popping it out and gently rubbing the contacts with a clean rubber eraser, another more risky option is a just drop of isopropyl alcohol on a cotton swab. If you have compressed air, you can give that a small blast into the SIM slot from a few inches away. If the phone is still having issues with reading the SIM after that, it might need to be replaced.

Another possibility is issues with the radio firmware. You can try updating the firmware by following the instructions in this post. Personally, I recommend the most recent version, 2.06.605.1. Some users, myself included, have reported that sometimes a full RUU back to 100% stock is necessary to restore proper radio function. Instructions for that can be found here, but be aware that this can be a lengthy, tedious process. You'll end up having to re-unlock and root your phone before you'll be able to flash anything else again, so I only recommend this as a last resort, but is nonetheless something to bear in mind.