Speaking of the graykey, I was in an EE shop the other day, and I noticed they had a large bit of kit on the desk, upon closer inspection it was a cellebrite device UFED 2. When I asked the guy why they had one, he informed me it was to transfer data from one phone to another. Expensive bit of kit to do a phone transfer, he also informed me that all shops have them!!
Baring in mind these things can crack the iphone open like a nut, i'd be careful giving anything to anyone in EE. Likely other providers will likely have them as well :/