Will I get Offcial updates after rooting my Xperia SP? I have Sony Xperia SP, I am planning to root my device. Will I get offcial updates ( Like Kitkat update in future ) after rooting?
No, OTA updates only work with unmodified system images. If you can download a new official system image, you'll still be able to flash that yourself, but you'll probably have to root again after you've done that.