[GrimUpNorth]

Hi Everyone

We're moving from Virgin Mobile to Vodafone and the numbers are due to port tomorrow. Mrs G has an iPhone 6S which was bought sim free earlier in the year. However, when we put the Vodafone sim in we get an error about the sim not being valid and failing activation???

I've tried the Vodafone sim in another phone and it works fine.

I've found a couple of comments online mentioning that the iPhone 'locks' itself to the network of the first sim inserted - is this the case and if so how do I 'unlock' it?

Any suggestions welcome as not having a working phone is not an option (so I'm told) and my life will be made a nightmare until it's sorted (might even have to make my own tea)!!

Cheers

Grim