i don't know whether anybody knows bout this but i just got some update from a friend who went to note3 n g. gear training.

galaxy gear only can pick up or make calls for 10 seconds.
after 10 sec the call will be transferred to smartphone to continue calls...

wtf??!!

If yours is a microsim issued in the past 1-2 year ago, it should be auto LTE enabled. If it cannot detect LTE, than just have the simcard change at ANY Maxis dealer/center. You need not to activate it as is auto enabled
No reason why Maxis cannot support Note 2 LTE unless your microsim card is very old ( beyond 2 years ??)

My Spore friend Note 2 LTE works well here in Malaysia. Maxis usually only list the phones they sell. You can try calling them about Xperia Z and high chances they will tell you is not supported as is not listed in their manual guide !!! That is exactly what the support staff told me when I first call to enquire about LTE on the Xperia Z. When I told them my phone could detect Maxis LTE at 45000 kbps than only the support staff refer to his superior . His superior told me the support staff just following the published guide and he doesn't even know the Xperia Z existed. He also told me there is no activation required ( my purpose of calling to verify this ) once the phone can detect it. He further told me all Maxis simcard is LTE enabled especially those issued in the past 1+ year ago.