Samsung Android Protips

I am currently running Android 4.1 Jellybean (in the form of CyanogenMod 10) on my Samsung Infuse 4G. It's pretty cool, and I really like Google Now. Of course, sometimes you end up breaking something when you're not using the official firmware, and in my case, I ended up corrupting the EFS partition because my phone locked up. Not a big deal; I made a backup. But I spent more time diagnosing the issue because all of the lists of Samsung special key combinations didn't work for me because they are meant for old devices. Here's the ones I needed the most:

• *#*#INFO#*#* (*#*#4636#*#*) - brings up the testing screen with options "Phone information", "Battery information", "Usage statistics", and "Wi-Fi information". The phone information screen lets you set the preferred network type, do some tests, and get/set the SMSC (message center). I ended up using this to determine the EFS data was corrupt because none of the testing info at the top of the Phone information screen was filled in.
• *#*#BAND#*#* (*#*#2263#*#*) - brings up "Service Mode" which lets you set the RAT, but I'm not sure what that means. In my case, it says RAT setting restricted. Now that I've learned the pneumonic for these, I'll probably not have to spend a couple hours Googling for the answer. But in case I forget them, it's on my blog.