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sorry was half asleep at that stage and only saw toggle airplane mode for some reason. cheers for the input. It's working grand and he loves it.
Do I back up as regular with itunes but how do I restore now that it needs custom firmware?

You have to create a custom firmware using redsn0w.

When you open redsn0w, you click extras and then theres an option called "Custom IPSW". That builds the custom firmware for you. Then you put the phone in pwned DFU. After that, you restore with the custom firmware you created.
 
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