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 chip_model ( RAM_MiB INTEGER, Model_name VARCHAR )
TABLE: CREATE TABLE phone ( chip_model VARCHAR, Company_name VARCHAR )

### Question ###
What is maximum and minimum RAM size of phone produced by company named 'Nokia Corporation'?

### Accurate SQL ###

SELECT MAX(T1.RAM_MiB), MIN(T1.RAM_MiB) FROM chip_model AS T1 JOIN phone AS T2 ON T1.Model_name = T2.chip_model WHERE T2.Company_name = "Nokia Corporation"