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Using a BT SIM card | BT Business

Using a BT SIM card

We activate most of our SIM cards before we send them out, so you should be able to use yours straight away.

If you need to keep using your old SIM card while you're waiting for your new one, we can only activate your new one when you receive it.

Activating your replacement SIM

You can complete the activation instantly from your BT Mobile Manager account or complete our online activation form here.

Once we've confirmed activation, turn your device off and switch it back on again. This makes sure the network change is picked up by your new SIM card. Don't panic if this doesn't work straight away; activation can take up to 24 hours to fully complete.

Using your SIM in a non-BT device

Our SIM cards are compatible with most devices but you'll need to make sure your device has been unlocked by your old provider or the manufacturer.

Ordering a replacement SIM card

Need a different sized SIM card for a new device? Contact us and we'll order you a new SIM card for delivery the next working day.

If your SIM card has stopped working, head to our Problems and faults pages for more help.

Lost or stolen SIM cards

If you've lost your SIM card or it has been stolen, you should contact us immediately.

SIM card's default PIN number

The default PIN number for a Physical SIM is 5555

What's an eSIM?

An eSIM works just like a normal SIM card except it's embedded in your device. Instead of inserting a SIM card into your device, you download a new profile to your device using a QR code. Read our eSIM support page to find out more.

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