the only network atm in the UK to offer 4g is EE and if your an existing customer ie orange or tmobile you have got to upgrade to EE to benefit the new speed not only that they cap you aswel to i think 15gb a month which you will use that in no time especially when its ment to be broadband speed ie if you stream vids
Luckily im with THREE and there getting 4g later this year but meanwhile they have upgraded all thier masts to 3.9g so should see a difference