SQL Server 2012 :: How To Merge Multiple Rows Into One Row

I have a table that looks like this ...

idtype_codephone_num
11111-111-1111
12222-222-2222
21111-111-1111
32222-222-2222

I want to merge the data to look like this ...

idphone1 phone2
1111-111-1111222-222-2222
2111-111-1111NULL
3NULL222-222-2222

Basically if the type code is 1 one then move the data to column phone1, if the type is 2 then move it to column phone2.

This would be fairly simple if we always have type codes 1 and 2. But sometimes we can have type 1 and not type 2, or we could have type 2 and not type1.

Right now we only have 2 type codes. But, in the future we could be adding a 3rd type. So that would add a 3rd column (phone3).

Below is my code that I have written. I move the data into a temp table then list it. I am thinking of making this a view to my table. It works just fine. My question is, is there a better and more efficient way of doing this?

CREATE TABLE #Contacts (
id INT PRIMARY KEY,
phone1 VARCHAR(15),
phone2 VARCHAR(15)
)

-- Insert the records for type 1

INSERT INTO #Contacts
SELECT id,
phone_num,
NULL
FROM test1
WHERE type_code = '1'

-- Insert the records for type 2, if the id does not exist for type 1

INSERT INTO #Contacts
SELECT id,
NULL,
phone_num
FROM test1
WHERE NOT EXISTS (
SELECT 1
FROM #Contacts
WHERE #Contacts.id = test1.id
)
AND test1.type_code = '2'

-- if the id has both type 1 and 2, update the phone2 column with the data from type 2

UPDATE #Contacts
SET phone2 = test1.phone_num
FROM #contacts
JOIN test1 ON test1.id = #Contacts.id
WHERE type_code = '2'
SELECT id, phone1, phone2
FROM #Contacts
DROP TABLE #Contacts