https://community.sony.co.uk/t5/z-series/handwriting-keyboard-cert-error/m-p/3358905#M50761 Dude i find my way.some of languages for handwriting is downloaded not completly.I remove that and download again and its good now.thanks Mon, 18 May 2015 09:47:16 GMT dondiego 2015-05-18T09:47:16Z https://community.sony.co.uk/t5/z-series/handwriting-keyboard-cert-error/m-p/3358903#M50759 Hi.my sony zu: android 5 and its good.<BR />But I have a problem.when I want to use handwriting keyboard it say:<BR />Recognized certificate has expired or is invalid.<BR />Please help me.I cant flash my ZU again.<BR />Thanks for help and sorry for my bad english Sat, 16 May 2015 08:36:14 GMT https://community.sony.co.uk/t5/z-series/handwriting-keyboard-cert-error/m-p/3358903#M50759 dondiego 2015-05-16T08:36:14Z https://community.sony.co.uk/t5/z-series/handwriting-keyboard-cert-error/m-p/3358904#M50760 Do you experience the same while on safe mode?<BR /><BR />How to boot on&nbsp;safe mode.<BR /><A target="_blank" href="http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008">http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008</A> Sat, 16 May 2015 15:20:12 GMT https://community.sony.co.uk/t5/z-series/handwriting-keyboard-cert-error/m-p/3358904#M50760 Phy 2015-05-16T15:20:12Z https://community.sony.co.uk/t5/z-series/handwriting-keyboard-cert-error/m-p/3358905#M50761 Dude i find my way.some of languages for handwriting is downloaded not completly.I remove that and download again and its good now.thanks Mon, 18 May 2015 09:47:16 GMT https://community.sony.co.uk/t5/z-series/handwriting-keyboard-cert-error/m-p/3358905#M50761 dondiego 2015-05-18T09:47:16Z https://community.sony.co.uk/t5/z-series/handwriting-keyboard-cert-error/m-p/3358906#M50762 Ok. Cool. Glad you got it to work. Fri, 22 May 2015 02:13:50 GMT https://community.sony.co.uk/t5/z-series/handwriting-keyboard-cert-error/m-p/3358906#M50762 Phy 2015-05-22T02:13:50Z