Step 1: Visit http://dev.office.com/devprogram and press JOIN NOW.
Step 2: Fill in all the required detail and press FINISH.
Step 3: Wait few minutes, receive the Welcome email from Microsoft then press Redeem today.
Step 4: Continue to fill in all the required detail and press Next.
Step 5: Fill in your detail then press Create my account.
Step 6: Fill in your phone number to get verified.
Step 7: Wait few minutes, another email named: “Get started with Microsoft Office 365” will come to you.