Anyone know how to fix ultrasn0w not working?

Been trying to fix ultrasn0w on iOS 4.x but I can't find anything about it. Anyone know how?

The only reason I am asking this is because EE refuses to unlock the phone as it was locked on Orange UK (btw if you don't know, Orange and T-Mobile merged to form EE in 2010 and Orange UK went out of service in 2019)

Thanks!
 
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