Several factors inside your home can influence how good a call sounds. Thick walls, metal structures and other electronics can interfere with the signal. The quality of your underlying line matters too; a noisy or crackly line will affect any cordless phone connected to it. Placing the base in a central, open position usually helps. If you are unsure which model to pick, look for digital cordless phone sets with good range reviews, then buy cordless phone online from a specialist who can advise you on placement, batteries, and settings for the best possible sound.