https://community.sony.bg/t5/m-series/security-password-after-changing-the-sim/m-p/3304387#M3743 No n really it's too much irritating. Mon, 22 Sep 2014 13:26:35 GMT arindampaulju 2014-09-22T13:26:35Z https://community.sony.bg/t5/m-series/security-password-after-changing-the-sim/m-p/3304385#M3741 I've changed ported my sim card on XperiaM c1904 model. It is asking security password every time to unlock the screen. But please help me how to remove this. Wed, 10 Sep 2014 08:39:36 GMT https://community.sony.bg/t5/m-series/security-password-after-changing-the-sim/m-p/3304385#M3741 arindampaulju 2014-09-10T08:39:36Z https://community.sony.bg/t5/m-series/security-password-after-changing-the-sim/m-p/3304386#M3742 <P>hi ...Have u managed to resolve this??Even I am facing the same issue as you. Its quite annoying to put the password everytime the scren gets locked. Please help me in case u have been able to resolve this issue</P> Fri, 19 Sep 2014 06:20:18 GMT https://community.sony.bg/t5/m-series/security-password-after-changing-the-sim/m-p/3304386#M3742 ashwyn1 2014-09-19T06:20:18Z https://community.sony.bg/t5/m-series/security-password-after-changing-the-sim/m-p/3304387#M3743 No n really it's too much irritating. Mon, 22 Sep 2014 13:26:35 GMT https://community.sony.bg/t5/m-series/security-password-after-changing-the-sim/m-p/3304387#M3743 arindampaulju 2014-09-22T13:26:35Z https://community.sony.bg/t5/m-series/security-password-after-changing-the-sim/m-p/3304388#M3744 if you have changed the sim and then it is coming... turn off all security settings.. then switch off n switch on using the ild sim n keep it for some time. then switch off and on with new sim... then turn on all security settings.. it has worked for my set.. try this.. Sun, 10 May 2015 13:41:47 GMT https://community.sony.bg/t5/m-series/security-password-after-changing-the-sim/m-p/3304388#M3744 arindampaulju 2015-05-10T13:41:47Z