Mobile hard reset steps :

Step 1: First turn off your Symphony android mobile.

    Step 2: Release any sim card or sd card on your mobile.

Step 3: Press and Hold Vol+ key and Power key 10 seconds.

image: http://mobilehardreset.com/wp-content/uploads/2014/09/symphony-h100-242x300.jpg

Read more at http://mobilehardreset.com/how-to-hard-reset-symphony-xplorer-h100/#WkcyUYGJd0yz0P6c.99Step 4: When you see on your mobile screen Symphony logo release only power key, after sometimes you see Android icon then release all hold key.

Step 5: You got Android system recovery mode Use Vol – key select wipe data/factory reset and press Vol+ key to confirm.

image: http://mobilehardreset.com/wp-content/uploads/2014/06/wipe-data-fectory-reset.gif

Step 6: Use Vol- key select Yes — delete all user data and press Vol+ key to Confirm. (Notice: when you select Yes — delete all user data  and press Vol+ key you lost your phone all user data)

image: http://mobilehardreset.com/wp-content/uploads/2014/06/delet-all-user-data-300x171.jpg

Step 7: Wait until complete hard reset, select reboot system now and press Vol+ key.

    Step 8: Now your mobile will reboot.

Step 9: Your Android mobile is now ok.

Read more at http://mobilehardreset.com/how-to-hard-reset-symphony-xplorer-h100/#WkcyUYGJd0yz0P6c.99