Share your experience!
I think we need a new firmware update for Xperia V, T and TX as RAM sometimes drops at below 200MB
Try to install some cache cleaner that will help you free up some space and make your device a bit faster. Try App Cache Cleaner in Play store.
For the new firmware, search this forum on the Xperifirm. It will get you the latest firmware available on your Xperia V.
you mean rooting the device?