Mobile phone returns are handled by the retailer at which the device was purchased (we are a phone comparison site).
Each retailer will have their specific returns policy, however, for reference most offer a refund or exchange within 14 days of a customer receiving the device.
Most new phones will have a 12 month guarantee in the event that the phone is faulty.
For a retailers’ specific returns policies and the address to send the phone back to please visit the respective website of the retailer you purchased the item from for more details.