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my phone is sony ericsson e15i which is restarting again and again i want to take backup of contact so what i do
Hi maheshnikam
Right click on the button, if you can able to use phone, then you get option "backup contact" select it, .vcf format stored on your Card, you can get it as back
>or you can sync on to your gmail account, and from there you can sync back to phone, after issue is fixed
Manjuboyz 
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Are you able to start up the phone and get access to the menus? If the phone is stuck in a boot loop it's unfortunately not possible to backup the device.