If you're playing Ingress you know all about these passcodes. You can enter them through the Ops menu in the app, or going to ingress.com/intel and find the "Input Passcode" button in the bottom right corner. These passcodes all provide you with more AP (Action Points), XM (Exotic Matter), Resonators, XMP and Portal Shields. Some of the Resonators are L8 which is great for those of us that are lower levels. Here are the passcodes:
L4 Resonator x 4
L8 Resonator x 4
L4 Resonator x 3
Portal Shield x 2 (common)
Let us know which ones work for you. Remember they do expire rather quickly, so hurry up! I was able to get all three of these so I can confirm that they are working at the time of writing this post. The fourth passcode should be out later today, and I'll update this post as soon as it's out so stay tuned.
Update 1: We are getting reports that these passcodes are giving users an "ALREADY_REDEEMED" error when trying to use them. So it looks like they have expired already. We are still waiting on the fourth code.
Update 2: Fourth passcode added