help me please

[nicolaevans]

My xperia m2 is so slow to download and update now YouTube lags all the time it's driving me crazy I've installed a cashe cleaner, also tried to force stop apps I never use. I've got a 8g sd card transfered as much data as possible to theat so I have enough internal storage what could this be I love my phone but this is slowly driving me nuts!!!

[Uliwooly]

uninstall any taskiller, cache cleaner, antivirus, etc. download speedtest and check your network/wifi speed. 

[Phy]

Do you experience the same lag while on safe mode? http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008