How to reset Tecno Pop 7 - Factory reset and erase all dataClick on the last option “Erase all data 

Hard reset Tecno Pop 7 - Wipe data
First of all, turn off your Tecno Pop 7 completely. If you can't unlock the screen, press and hold the power button for about 20 seconds and the phone will turn off Now hold down the Power key and click on the Volume Down #foryou #foryourpageシ #tech #viral key once. Restore TECNO Pop 7; The Recovery Mode