To hard reset or simply factory/master reset is to restore your device to its initial state. The initial state is the state it was when leaving the factory. There are many reasons that would make you decide to hard reset your Sony Xperia E4.

Generally, the following are the best methods you can use to hard reset Sony Xperia E4.

To hard reset Sony Xperia E4 using hardware buttons,

1. Make sure the battery is full

2. Backup your necessary data

3. Power off the E4

4. Long press power key plus volume up key until a new service menu appears

5. Go to factory reset using volume buttons and confirm it using power button

6. Phone will hard reset

Using menu

To hard reset your Sony Xperia E4 using menu,

1. Power on the E4

2. Make sure the battery is full

3. Go to phone menu, then setting, then backup and reset, then factory data reset, then reset device

4. Select erase everything

5. Phone will hard reset

Using code

To hard reset your Sony Xperia E4 using code,

1. Make sure the battery is full

2. Backup your necessary data

3. Power on the E4

4. Go to dialer and type the following code; *#*#7378423#*#*

5. On the new menu, select customization settings, then reset customization, then confirm

6. Phone will hard reset