Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE phone_market ( market_id number, phone_id text, num_of_stock number )
TABLE: CREATE TABLE market ( market_id number, district text, num_of_employees number, num_of_shops number, ranking number )
TABLE: CREATE TABLE phone ( name text, phone_id number, memory_in_g number, carrier text, price number )

### Question ###
How many phones are there?

### Accurate SQL ###

SELECT COUNT(*) FROM phone