Solved: How to reset Sony Ericsson W8 E16i hard reset
Reset only applications:
In the Menu go to Settings > Privacy. Tap Settings reset to reset your applications without changing your data or accounts.
OR Reset all data:
Tap Factory Data reset > Reset phone > Erase everything to RESET all data, Google accounts and all downloaded apps.
If nothing works: As last resort do a Sony Ericsson Walkman W8 phone repaire with PC Suite. Use this method to hard reset AFTER INSTALLATION—-> TOOLS > PHONE REPAIR