There are many advantages to having an unlocked phone, which includes no limit on any services and not having to pay any extra charges or fees if you pass the limit. However, I would not recommend getting an unlocked phone for office use, seeing that it would be used frequently for business related jobs. Therefore, getting a plan for a locked phone which includes unlimited data, and minutes would be better than getting an unlocked phone because you would have to pay more than the price of the plan.