Hi everyone,
After few months I finally found a software that can unroot my prestigio 5455 duo : Kingroot
1) download kingroot here : http://translate.google.co.uk/translate?hl=en&sl=zh-CN&u=http://www.kingroot.net/&prev=search
2)open king root and click on the big green dot
3) when finished, click on the blue bar
it's done ! (you might have to reboot the phone, I don't remember)
To copy applications on SD card I use Link2SD
Good Luck
After few months I finally found a software that can unroot my prestigio 5455 duo : Kingroot
1) download kingroot here : http://translate.google.co.uk/translate?hl=en&sl=zh-CN&u=http://www.kingroot.net/&prev=search
2)open king root and click on the big green dot
3) when finished, click on the blue bar
it's done ! (you might have to reboot the phone, I don't remember)
To copy applications on SD card I use Link2SD
Good Luck