Missions: Alerts you on a new mission and allows you to teleport to the EPF Command Room to start and complete the current mission.
Teleport: This allows you to teleport to most free rooms. All are arranged in alphabetical order.
Messages: Added in January 2011 when System Defender came out. This informs you of what's going on with parties, and other EPF-related situations.
Gadgets: Lets you see what gadgets you have. There is currently only one gadget, the TraceTracker 3000. The TraceTracker was not included in non-member's phones. The EntryGainer 3000 can be used when you break into Herbert's Hot Sauce Lair.
EPF Button: Like the teleport button, but this teleports you straight to the EPF Command Room (The button is at bottom of the EPF Phone).
Field-Ops: This alerts you on any new Field-Ops, and it provides a quick reminder of what you have to do on current ones. This feature is removed after the upgrade on April 5, 2013, and was replaced with missions.
Recruit: This gives you information on how to make other Penguins join the EPF.
Spy Phone Upgrade
On April 5, 2013, all EPF Spy Phones were upgraded. They are thinner and bear less resemblance to any particular phone that exists in the real world. It was mentioned by Gary in February 2013, in an EPF message.
During the Prehistoric Party 2013, if you travelled back in time, the Spy Phone could not be used, since there would be no signal available, so it would disappear from the screen and it wouldn't open if you tried to access it from your Player Card.
After April 5, 2013, characters appear in the new art style in Messages except PH.
As revealed at the end of Field-Op #56, the EPF Phone is "functional in temperatures as low as 200 degrees Kelvin." This is equivalent to -173.15 Celsius degrees, and -819.67 Fahrenheit degrees.
Using a glitch, many penguins use the EPF phone to teleport to the Stage when it is inaccessible.
Glitches
On May 11 the Director of the E.P.F. sent a message to all penguins that said: All agents - upon completion of this week's Field Op, please take some time to enjoy the Holiday Party, and help out with Coins for Change.
Currently on new accounts, after collecting the phone, the EPF Phone doesn't show above the map, but does save to the inventory. This makes the phone inaccessible to new players.