A locked phone is tied to a specific mobile network (carrier) and has a software lock that prevents use with other networks. A fully unlocked phone doesn’t have this restriction and, in most cases, you can just insert your SIM (or activate an eSIM) to get started.
Fully unlocked phones can be used with any compatible UK network (e.g., EE, O2, Vodafone UK, Three) and most UK MVNOs. However, before purchasing, we recommend checking that your plan and the phone’s model/bands are compatible with your chosen network. Some features (like 5G, VoLTE, Wi‑Fi Calling, and MMS) may require the correct APN/settings and may vary by device model and network.
Does Back Market sell unlocked phones?
Yes. Whether a phone is unlocked or locked is shown near the top of each product page.