No Data with Samsung S7 Edge Verizon version in the UK

[AC Question]

I bought the Samsung S7 Edge verizon version to bring back to the UK and use on the Three network. I realize the 800Mhz band is used by Three but the phone antenna won't catch it. However, I cannot get any data connection at all.

Is there any tricks/settings I should be using? The SIM is recognized (verizon phones are unlocked, i can make calls, just no data).

Thanks.