Randomly rebooting screen freezing and pixels fade away

[liam3223]

Hello

I have an xperia sp its starts to freeze up and then it has this fad away affect im not shore what it is.It happends about two times a day or even more Can someone please help me 

Thx

[dm84]

Seems like a buggy firmware try to get the au firmware flashed and delete the bloatware like Facebook, evernote and any other like ps app and ur firmware would be stable with about 589mb

[roycdm]

since 4.3 update i encounter once & so far so good... it seem like the ram management issue... from bad to worse... my sp since brought do not have any others issue only is the ram management...