IPhone 5 - Disable 3G?

Question

About to push the button on an iPhone 5 purchase to replace my 4.
Can anyone in the UK advise whether the 'Enable 3G' option is still available? I see for screenshots that you can turn LTE on and off (will always be off since it doesn't exist here yet) but can you turn 3G off as well?
Currently I turn it off all the time as there isn't 3G at home or work, so I get better bettery life like that. (I know 3 disable this setting - that's why I've always avoided them, but if it's disabled like it was originally on the 4S then I may have to look at a different model)
Thanks in advance for any assistance!

Answer 1

Just an update to the info on this page, which I read and was helpful before I just put in a call to Orange...
I'm on Orange (or EE as they're now known) in the UK, using iPhone 5 with the latest OS update (6.0.1). After talking to EE (someone VERY helpful in customer services), she informed me that there is no option to turn off 3G for the iPhone 5. I assume she was talking about generally for the handset, rather than just on Orange.
She did however give me some good advice:
Go to Settings/General/Mobile Data. There should be an option to enable LTE. Note that this option was not visible to me until I'd turned Mobile Data off and then on again (bizarrely). Unless you happen to be in one of the small number of areas in the UK which has 4G, this MUST be turned off, otherwise it can worsen your 3G and voice signal. Not sure of the technical accuracy of this, but sounds reasonable to me.
Then, go into Settings/Carrier and turn off automatic network selection (if it is turned on). This will give you a list of the networks your phone can see. You must select EE(3G), otherwise you get the same problem as above. The straight EE option (which for me was the one selected under the 'automatic' setting) looks for 4G.
Hopefully all this is of help to others. I'm not sure if it has solved my particular problem yet...I have signal problems when at home for voice calls and I was advised to try turning off the 3G, thereby pushing calls through 2G (which should be better for voice alone). The fact that you are UNABLE to turn off 3G on the iPhone 5 probably means this suggestion won't work, but at least turning off 4G/LTE may make a difference.