Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_11 (number_of_mobile_phones VARCHAR, last_updated_date VARCHAR)
### Question:
How many mobile phones were there as of April 2013?
### Answer:
SELECT number_of_mobile_phones FROM table_name_11 WHERE last_updated_date = "april 2013"