carrierlocked

A carrier lock, often referred to as carrier locking or being carrierlocked, is a software restriction placed on a mobile device by a mobile network operator. This restriction binds the device to the operator's network, preventing it from being used with other carriers' SIM cards. Typically, this lock is applied to devices sold at a subsidized price or offered through specific payment plans. The carrier recoups the cost of the device through the service contract.

Devices are usually carrierlocked at the time of sale. If a user attempts to insert a SIM card from a different carrier, the device will not connect to the new network and may display a message indicating an invalid SIM or a request for an unlock code. The purpose of carrier locking is to ensure that the customer remains a subscriber to that specific carrier for a predetermined period, thereby fulfilling the terms of their agreement and allowing the carrier to recover their investment in the hardware.

In many regions, regulations or consumer advocacy have led to policies that allow or require carriers to unlock devices after a certain period or once the device has been fully paid for. To use a carrierlocked device with another network, the original carrier must officially unlock it. This often involves contacting customer service and meeting specific eligibility criteria, such as completing a minimum contract term or paying off the device balance. Once unlocked, the device becomes "unlocked" and can be used with any compatible SIM card from any carrier worldwide.