In order to hard reset a Samsung R910 Galaxy Indulge, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Samsung R910 Galaxy Indulge device will be brought back to the default configuration of a brand new device.
1. Switch off the phone.
2. Press-hold the R & Power buttons. Let go of them when the Samsung logo pops on-screen.
3. Now select wipe data/factory reset. To do that, use Volume buttons to browse the menu and Power button to select the option.
4. Continue by selecting Yes and Reboot System Now.
5. Done!