In order to hard reset a Sony Ericsson T100, you should perform the following steps.

Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Sony Ericsson T100 device will be brought back to the default configuration of a brand new device.


1. Start with installing the PC Suite.
2. Open Tools and Phone Repair and continue with the installation wizard.
3. Phone should now reset and restart. Done.