Club Penguin has released their 37th field op, for the 21st of March. To start with, go to the Elite Penguin Force Command Room for your briefing.
Head over to the Mine Shack.
Your spy phone will turn green. Click it, and complete the Field Ops by matching the radio frequency.
If you are still confused, here is a video:
Check back next week for Club Penguin Field Ops 38!