Yes and I have checked the network coverage checker on the website and it says its available in the area and should be if my C6603 can find it in mobile networks apparently theres ment to be an update to update the carrier or something like iPhone does also I dont have the 4G option were nfc is I think I might try flashing stock 4.3 ftf and then try I thing my brother has the same problem and hes on eXistenZ for xperia Sp though so I could just be the rom
Actually, it might be that your handset needs to be enabled by Three to actually connect. Might be worth giving Three a ring.
Your handset SHOULD be able to see 4g networks. Mine does, and I'm running the exact same rom.
Settings > Wireless & Networks > More > Mobile Networks > Network Operators. Your handset should then search for a while, and bring up a list of all the networks it can see, like this:
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