Yesterday, Google decided to drop the price of their Nexus 4 by $100. That’s good news for most, but at first glance, not for people who have recently purchased the phone. Google cares and understands, as they have decided to give a $100 refund to those who have purchased a Nexus 4 in the last 15 days, or since August 12.
If you’re one of these people, you have 15 days, or until September 10, to claim your refund. You must manually request a refund, it’s not automatic. Go to the source link to submit your refund request.
Source: Google Support