* Part of a proper noun:
* "The Telephone Company" (referring to a specific company)
* "The Bell Telephone" (referring to a specific model)
* The first word of a sentence:
* "Telephone me when you get home."
* Used in a title:
* "The History of the Telephone"
* Part of a trademark:
* "Motorola Telephone"
In most other cases, "telephone" is lowercase.