First Mentioned: Hvs.tCF 61
It is southwest of the Kingdom of Faq.
Caesar was planning to attack Carphone from his war room in Cartoonito, using greasemonkeys, mansquatch, thunderbirds, and bats. However, he changed plans when Carpool invaded the port city of Aqua Velva.
Control of Carphone
Real World References
Carphone is obviously a reference to the Car phone, an early type of mobile phone.