Default [Q] Need help!!

4 days ago I got the new android version of kitkat for my Xperia zr and updated it.first time I didn't face any problem but yesterday from evening I was unable to use any Google services and also I couldn't use any third-party apps.I mean non of my phone apps receiving any data connection but my data connection was fine.so I thought it was a bug problem and reseted my phone factory but it didn't work.so there's finding no other way I downgraded my phone into 4.2.2 jb.unfortunately this time also I was unable to use any apps or Google services.they aren't receiving data connection....can anyone tell me why this is happening?

thanks in advance and sorry for my poor English