As above really. I have an O2 locked Sony xperia sp which I would like to put android 4.4 on. I have read various articles on rooting it, but none of them either make sense or in the case of one I tried worked. Some lead to websites that won't let me download the rooting kit or if I can get it to download, then informs me it is not for that phone despite me having checked it was the correct phone, android version and phones firmware... I appreciate that the kits are specific for unlocking and rooting, the phone is on 4.3 which on my phone had been very unstable crashing at midnight unless I turn off network operator time synchs and is really bad for a flickering screen etc. Had anyone any experience of rooting the phone that can guide me please? It is outside its 1 year warranty but not fully paid for yet - another 9 months to go on that.