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 ( Carrier VARCHAR, Memory_in_G INTEGER )

### Question ###
Show the carriers that have both phones with memory smaller than 32 and phones with memory bigger than 64.

### Accurate SQL ###

SELECT Carrier FROM phone WHERE Memory_in_G < 32 INTERSECT SELECT Carrier FROM phone WHERE Memory_in_G > 64