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I had the same problem yesterday when my Galaxy S4 updated its operating system. I was temporarily locked out by Wheres My Droid and when I entered my usual pin the program emailed and SMS texted my husbands phone that my pin had just been entered correctly. It then locked me out permanently!!!! (Go figure!!) The only way I could get back into my phone was to uninstall the programme and then reinstall. I think Find my Droid has a problem with the new software update. Great piece of software though, I have located my lost phone several times using this program so was determined to keep it. So my advice
uninstall and reinstall and see if that works for you, good luck
Thanks cola for the speedy reply, yes it has now locked me out completely too, so I did a hard reboot and uninstalled wheres my droid, I then downloaded a more up to date version and that seems to be working fine. Thanks

This forum is fantastic I found a solution to my problem immediately. Like fredsfish above I was convinced I had a spam virus on my phone as my work and family were getting SMS messages and sometimes email telling them I had successfully entered my pin number as with both of you I was then locked out of my phone until I uninstalled the program. It must be a software update issue as it has only happened since yesterday evening when my phone updated its operating system. I am not sure if I will bother reinstalling as it hardly seems worth the trouble, I may try another lost phone locator. After uninstalling all is running well and the irritating SMS and emails have stopped. You guys are great![]()
I had the same problem yesterday when my Galaxy S4 updated its operating system. I was temporarily locked out by Wheres My Droid and when I entered my usual pin the program emailed and SMS texted my husbands phone that my pin had just been entered correctly. It then locked me out permanently!!!! (Go figure!!) The only way I could get back into my phone was to uninstall the programme and then reinstall. I think Find my Droid has a problem with the new software update. Great piece of software though, I have located my lost phone several times using this program so was determined to keep it. So my advice
uninstall and reinstall and see if that works for you, good luck

rolling back your operating system can be pretty much impossible on recent versions of Android on the s4 with locked boot loader.If this does not work I will roll back my operating system to the older version of jellybean and see if that works. !