Default [Q] Can't get LTE connection on Fido

Hi All,

Got a new xperia Z1 c6906, setup all things, did input correct APN, chose LTE in the mobile setting. But it couldn't get LTE connection, it always go back down to H+ / 3G, always switch between H+ and 3G. just wondering if the baseband problem? or I have to call Fido and ask them to register my IMEI to their LTE network if the phone couldn't do it itself? thx so much anybody can help.

p.s. previously using Samsung SIII, using LTE sim card and sure in LTE area since I didn't move.