No. We have a mix of locked and unlocked phones to choose from. If you've selected a network locked device (e.g. Vodafone), you'll need to ensure that you have a compatible SIM card. Unlocked devices can be used with any UK network provider.
We'll state on the product listing whether a device is locked and which network it is locked to.
Please be advised that the price may change depending on whether you choose to purchase a locked or unlocked device.