In order to hard reset a Sendo SV663, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Sendo SV663 device will be brought back to the default configuration of a brand new device.
1. Hello. Begin by turning off the phone.
2. Next plug in charger to your phone until the phone charge in off mode.
3. After that press and hold 5 key + Power button.
3. Next, press and hold the Power & 5 buttons at the same time. Release them after a green tick appears on-screen.
4. Lastly, press Left Soft Key and wait until the phone resets and restats. Voila.