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Unlocked iPhone4 from UK.'Invalid SIM' message. What to do?

anne_87
Newcomer

I recently moved back to Ireland from the UK, where I was using an unlocked iPhone4 with a Giffgaff (O2) sim card. When I put my activated 48 sim into the iPhone, I keep getting the message 'invalid SIM' and 'SIM failure'. I've tried changing APN details, turning on and off the phone, but nothing changes. Can anyone offer advice, please?

3 REPLIES 3

dalyer
The Legend
The Legend
If you are 100% sure that is properly unlocked...
Try putting a small amount of cash credit on your account. iPhones sometimes need activation on certain networks and this process automatically sends a UK SMS which costs 25c.
After doing that switch off and on again then wait a while and see if it activates and starts working.
Blame Apple for this stupid requirement.

Hope this helps.
I am not a 48 employee - if you need to contact 48 support you can do so by chat, email (support@48months.zendesk.com) or phone.

Did that help at all?

I am not a 48 employee - if you need to contact 48 support you can do so by chat, email (support@48months.zendesk.com) or phone.

Sadly not, but thank you! I'm going to take my phone into a phone store to check it out.