How to factory reset LG K4 LTE K121? How to wipe all data in LG K4 LTE K121? How to bypass screen lock in LG K4 LTE K121? How to restore defaults in LG K4 LTE K121?
The following tutorial shows all method of master reset LG K4 LTE K121. Check out how to accomplish hard reset by hardware keys and settings. As a result your LG K4 LTE K121 will be as new and your Qualcomm MSM8909 core will run faster.
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How to Hard Reset LG K4 - LG FACTORY RESET / FORMAT
LG K4 Hard Reset / Bypass Screen Lock / Format / Hardware Keys Method
Hard Reset will erase all of your data
All described operations you are doing at your own risk.