As usual, following a month of carrier exclusivity, Apple has now begun selling factory-unlocked, SIM-free versions of the iPhone 6s and 6s Plus at full retail price. The units have the advantage of allowing users to pick more customized plans that suit their needs, or change carriers at will, as well as be used in nearly any country globally with local providers. Broadly speaking, buying an unlocked iPhone outright is also generally the least expensive option in terms of total cost of ownership and highest resell value.
