HTC Desire 820Q Dual SIM Hard Reset Solution
https://gsmfixer.blogspot.com/2016/08/htc-desire-820q-dual-sim-hard-reset.html
Hard Reset HTC Desire 820Q Dual SIM To Remove Pattern Lock Via Hardware Keys. Factory Restore HTC Desire 820Q Dual SIM to Restore Settings. HTC Desire 820Q Dual SIM Master Reset to Solve Hang on Logo Problem. Hard Reset Allows Mobile Users to Remove all Settings and Applications Added by them and Restore Mobile to Original Settings. After too Many Pattern Attempts You can Hard Reset HTC Desire 820Q Dual SIM to remove the Pattern Lock. Here are Some Simple Steps to Follow:
Press and hold the Volume Down + Power button.
Use Volume keys to select option "Recovery", and press Power button to confirm.
When the the phone's image appears on the screen hold down the Volume Up + Power key for a short while.
Select from Recovery Mode menu "wipe data / factory reset" using Volume buttons and Power button to confirm.
Select "Yes -- delete all user data" to confirm the whole operation.
Confirm Option "reboot system now".
That's Great!
Use Volume keys to select option "Recovery", and press Power button to confirm.
When the the phone's image appears on the screen hold down the Volume Up + Power key for a short while.
Select from Recovery Mode menu "wipe data / factory reset" using Volume buttons and Power button to confirm.
Select "Yes -- delete all user data" to confirm the whole operation.
Confirm Option "reboot system now".
That's Great!