if you bought a second-hand ‘sprint HTC evo 3d’ which is locked, you may need to perform a hard reset to restore the device factory default settings.
How to hard reset sprint HTC evo 3d? how to reset sprint HTC evo 3d to its factory default settings?
Step 1, remove the battery and re-install it.
step 2, Hold the Volume Down button,Press and release the Power button
step 3, now you have a access to a that allows for menu Fastbook, Recovery, Clear Storage, and Simlock.
step 4, Press the “Volume Down button” to select “Clear Storage”
step 5, Press and release the Power button
step 5, Press Yes to confirm
now all data including third-party applications will be deleted,reboot your device, you will find your sprint HTC evo 3d restored to its factory default settings.