When you first get your iPhone it will typically be 'locked' to a mobile network, such as EE, Vodafone or O2.

This means it'll only work with SIM cards from that network (e.g. an iPhone locked to O2 will only accept O2 SIM cards).

Generally when you want to unlock any other type of phone, you take it to a local phone shop and they unlock it for you.

iPhones are different, the status of the lock is stored on Apple's computers, so even if you pay a shop to unlock an iPhone, it's only ever a temporary solution.

Normally when you connect your iPhone to iTunes for an update or when a new iOS is released, Apple will lock the iPhone again to the network that it was originally on.

Not sure if your phone is locked? Quickly find out what network carrier your iPhone or iPad is locked to.

Full device profile – find what network your iPhone is locked to, Warranty status, sim lock status and more. All models supported, just tell us your IMEI number. Go here: https://iphonesunlock.co.uk/product/iphone-imei-network-check/