The Shoe Phone is one of Ed's communicating devices in Me and The Eds.
Apperance in The Series
Ed uses this to contact Casimus or Edd and Eddy. He also uses this to report his progress to The Eds when he is on a misson. When he uses this, he most commonly uses a line from Get Smart. He also said that he couldn't hear Sarah because he was using his shoe as a phone (even though he could hear her clearly). The 2 lines he used from Get Smart were: "I missed it by that much" and "I asked you not to tell me that".
Differences from the Get Smart Shoe Phone
The phone is just done in black instead of khaki brown. And it uses a keyboard instead of a dial.