[Pogilexis]

I have not opened my phone for a year and has a pin code set as security. Guess what, i forgot the pin code.

I accessed my phone through android device manager and set up a new lock code.

My mobile model is htc one m7. Now on the screen it has a locl symbol and says locked by android device manager. But there are no options to input the password made from my android device manager.

Please help!

[B. Diddy]

Welcome to Android Central! As far as I know, ADM doesn't allow you to change the password on a phone that already has a password lock set -- it will only work if the phone didn't have a screen lock in the first place. What status does ADM on your computer show for the phone right now?

[Golfdriver97]

I thought ADM would allow a device to have a password reset. Hang on; I can test on my Nexus 5X.

I was incorrect. I can lock and erase the device, but not change the password.

[B. Diddy]

Right -- if the phone already has a screen lock set, ADM will let the user know that a new password isn't necessary, since the phone is already locked.