Help and support
Let us help you find what you're looking for
Why does my mobile say invalid SIM?
If your phone is coming up with the message Invalid SIM card, this may be because you're trying to use our SIM card in a locked handset. You'll need to contact your previous provider and ask them to unlock this for you.
If you don't think this is the problem, please contact us and we'll be able to look into this for you.