The T-Mobile Sharp Sidekick III (3) in Silver & Black is a stylish cell phone with a single SIM card slot and Android operating system. It is locked to the T-Mobile network and does not come with a contract, making it convenient for users who prefer flexibility in their phone service. Please note that this phone is network locked and may require unlocking to use with a different carrier. Be sure to read the listing carefully for more details before making a purchase.