LG G2 LTE issue after update

Hello,

I was one among many who bought the kogans LG G2 deal on ebay. I got my phone after a week
and its been working fine until I updated it to KItKAt 4.4.2. The DATA / LTE wont work after the update.
Ive been searching on forums on this issue but none give a good resolution.

Im using a Telstra SIM on this unit. Anybody else who had experienced this and can offer a resolution ?

Cheers