.Today I insert new Sandisk 64 gb SDXC card in my Xperia SP and it works very fine
As told by Sony max supoort is 32 gb but 64 gb card also works fine
So go for it .....
But take care phone should be updated to latest FIRMWARE/OS i.e. ANDROID 4.3 and above
thanx...
Best wishes to all.
ABHIJEET
