The process is quite simple, it is known as a hard reset, and can be done easily by any person who has software problems withe the phone.
If you forgot your lock code or pattern or fingerprint scanner does not work, you can do hard reset.
GSM frequencies :850 900 1800 1900
Standard UMTS :850 900 1900 2100
Type :Touch
Dimensions (W x H x D) :142,00 x 72,50 x 8,10 mm
Weight :145,00 g
Main display :Color / Super AMOLED
16M colors
1080 x 1920 px (5.10") 432 ppi
Talk time (max.) :3G: 1260 min. (21,0 h)
Stand-by (max.) :3G: 390 h. (16,3 days)
Standard battery :Li-Ion 2800 mAh
Phonebook memory : Internal memory :16 GB
RAM memory :2 GB
Memory cards : microSD, microSDHC, microSDXC (up to 64 GB)
Operating system :Android 4.4.2 Kitkat
Processor :Qualcomm Snapdragon 801 8974AC
Processor clock :2,50 GHz
How to hard reset:
Attention! After this reset, all personal data from phone will be lost, so make a backup before.
1.Power off your phone
2.Push together volume up+home key+power button
3.Select with volume keys "wipe data/factory reset" and press power to confirm
4.Select "yes" and press power to confirm
5.Wait until format ends
6.Press power key to confirm "reboot"
7.Wait until the phone restarts
That's it!
Here is video how to do:
