What is data card? Data card is an instrument or you can say an interface which use to connect the computer or laptop with internet. It works as a link between wireless signal and computer or laptop. On use basis there are two type of data card one is locked and another is unlocked data card. Locked data card is , a data card which is supplied by the respective mobile company with a post paid or prepaid connection and that data card can only be used with that particular mobile company connection where unlocked data card is a data card which can be used with connection of any mobile company. Locked data card means you have been locked with that company which given you a connection and for luring the new customers , at the time of taking connection this company promise very lucrative offer but once you have taken they will start showing their real face so it is advisable to take unlocked connection that will give you freedom to change your data operator just by changing you SIM card.
