No, the word 'cell phone' is a singular, common, concrete, compound noun, a word for a thing.
The word 'your' is a possessive adjective, a type of pronoun; a word that is placed before a noun to show that that noun belongs to the person spoken to (you).
A possessive noun would be a noun in the possessive form placed before the noun (cell phone) to tell who the phone belongs to; for example, the teacher's cell phone or Jack's cell phone.
The possessive form for the noun woman is woman's.Example: The woman's cell phone kept interrupting our conversation.
The singular possessive form is: the cell membrane's purpose.
The possessive form of the proper noun John is John's.Example: I have John's phone number.
The possessive form of the proper noun Betty is Betty's.Example: I have Betty's phone number.
The possessive form of the proper noun Tammy is Tammy's.Example: I have Tammy's phone number.
The word "Lisa's" is the possessive form of the proper noun "Lisa".A possessive noun is formed by adding an apostrophe s ('s) to the end of the noun. The possessive form of the noun indicates that something in the sentence belongs to Lisa.Example:I have Lisa's phone number. (the phone number of Lisa)I went to school with Lisa's sister. (the sister of Lisa)
The possessive form of the singular, proper noun Scott is Scott's.Example: I have Scott's phone number.
The possessive form of the singular, proper noun Scott is Scott's.Example: I have Scott's phone number.
The possessive form of the proper noun Diaz is Diaz's.Example: Mr. Diaz's office is on the tenth floor.
The word 'my' is not a noun.The word 'my' is a type of pronoun called a possessive adjective.A possessive adjective is a word that takes the place of a possessive noun to describe another noun as belonging to someone or something.The possessive adjectives are: my, your, his, her, its, our, their.The possessive adjective 'my' describes a noun as belonging to the person speaking.Example: Just a minute, I left my phone on my desk.Note: The pronoun 'my' is capitalized only when it's the first word in a sentence.
The possessive singular noun is explorer's. The possessive plural noun is explorers'.
The possessive form for the noun coyote is coyote's.