Depends, are you using us?
There are software unlocks and factory unlocks. Software unlocks are used in malls in which they ask you to come back within 20 minutes. In the meantime, they will plug in your phone and modify the firmware on it. Great right? Wrong. This will void your warranty and disable any future firmware updates.
On the other side, we unlock your phone using factory unlock. This is the exact same method your manufacturer or provider use to unlock their phone. Which means, you will keep your warranty, and you will be able to update your firmware.