Panasonic Eluga hard reset

Press and hold Volume down + Volume UP + power on the phone.
When you see the recovery screen you have to input Eluga terminal password. Use volume up/down to highlight items and power to confirm.
Select END then scroll down to Yes -- delete all user data, confirm with power key.
Select wipe data  - Factory reset, then Yes.

Or
Resetting Mobile Phone via menu

All personal information and downloaded apps will be deleted if you reset the phone. Back up any important data stored on the phone before resetting it.

Home screen > Panasonic Eluga menuSettings > Backup & reset > Backup & reset settings screen is displayed. Select Factory data
reset. Factory data reset → Reset phone → Erase everything.

[Factory data reset]
Backup & reset settings screen > Factory data reset > Enter terminal password > OK

To delete all data in microSD card, mark [Erase SD card] checkbox.

You can reset this mobile phone to the default status.
This operation deletes all the applications installed and data saved to this mobile phone after purchase, with some
exceptions.

If you want to delete the internal memory also, select [Erase USB storage] checkbox.

[Reset phone]
If [Face Unlock], [Pattern], [PIN], or [Password] has been specified for the [Screen lock] setting, perform the specified unlocking method.

[Erase everything]
After reset, your mobile phone is restarted.

Panasonic Eluga soft reset

If your phone becomes unresponsive or sluggish, try to soft reset by pulling out the battery and reinsert it. Restart your Android Eluga phone.

Panasonic Eluga battery reset

Panasonic Eluga soft reset force reboot

Press and hold POWER button for 20 seconds. Panasonic Eluga will reboot.

Unlock forgotten screen lock

Panasonic Eluga hard reset

Resetting Panasonic EB-3901 Smartphone dL1, reset P-06D

General advice: Before you buy a new cell phone or new tablet, please try the following procedure to repair your device in a software way. First charge your battery, backup your important data if possible and in most cases take out SIM and SD card before doing factory reset. It is impossible to recover your data after doing a hard reset, so online backup is always important. For all of your data, a backup should be done on an external device, hard drive, raid system or media. With or without insurance, if your cell phone lost, damaged or stolen at least your invaluable data is backed up in a safe place. If you are about to sell your phone and you want to wipe your personal data, or if your phone affected with virus you have to do a hard reset. In some cases, you can delete the forgotten password or lock pattern from your device as well. All information is for devices with stock based ROMs. If you are using rooted device, always back up your EFS folder first, containing your IMEI info, etc.! Please also note, that a hard reset operation will not unlock your mobile phone's SIM lock or network lock, but it will remove the unlock pattern, remove the user password or PIN password (NOT the SIM card's 4 digit PIN code). Also note that the firmware version will not be affected in any way, it will not be downgraded, it will remain the same you are using and if you have rooted your device, root privileges remain also unaffected.