Attempting to unlock an iphone 6 (sim not supported)

[Tuftey]

Hi, 

A friend of mine just gave me his old iphone 6. He has gone through the unlocking procedure mentioned here
https://www.o2.co.uk/help/phones-sims-and-devices/unlocking-an-o2-mobile-to-use-on-a-different-netwo...
and recieved a text that saying that it is unlocked. This was about 5 days ago. 

I finally got round to trying my different network sim and I get the sim not supported error. I have factory reset it and synced with itunes, but every time I put a non-02 sim in the phone I get a sim not supported error.

I asked my friend to go through the process again, but it says that it has already been completed. 

Thanks for any help 

[RichieH]

Hi, I’ve got exactly the same issue as described on this thread but for an iPhone 5. Would love to know the solution please!!

[MI5]

Maybe @O2Emma can help you @RichieH ?

[O2Emma]

Yeah no problem @MI5 .

[O2Emma]

Hi @RichieH I will private message you 

[MI5]