type password to decrypt storage Xperia M

My phone has got locked by itself and is showing 'type password to decrypt storage'.
I can't move further than this...
What all i tried and failed at:
1) Repair using Sony PC Companion. But after getting started some error pops up saying retry. And this happened with the Authorised Sony Service Care personnel too. So I brought it back to home.
2) tried flashing using Sony Flash Tool. But right now my device is connected in MTP mode. And flashtool is urging me to switch ON usb debugging so as to flash the device.

Problem: As the device is locked now. I can't switch ON usb debugging.
Kindly help.

NOTE: I'm new to XDA and would appriciate re-corrections regarding this post. Thanks :)

Forgot alternate Password, what to do ?

Hi,

i dont own a galaxy s5 but my buddy forgot the alternate password. and the fingerprint scanner is not working either.
can you tell me what the easiest way to get the phone working again?
we dont need any data to be backed up... it just has to work again.

root? factory reset ?
is a factory reset possible when the phone is locked via fingerprint scanner or password ?

thanks

[Q] Can't set lockscreen password after upgrading to Marshmallow

I upgraded to Marshmallow, specifically Bad Boyz Nexus Stock Rooted, and everything is working fine, but when I try to set it to something, it freezes up settings. Anyone know anything about this? Thanks.

Does anyone know how to password protect Nova Launcher settings?

Hi all, I'm new to this forum. In fact, this is my very first post here. I'm wondering if anyone out there knows of a way to lock the settings of Nova Launcher? I've tried a number of circumventing attempts to try and do this very thing. I find it incredibly difficult to fathom that the dev of such a great launcher, has never incorporated this option in the app. Especially since, one would think it an important part of such an app, since if you screen unlock your device for someone to use, then unbeknownst to you, they either intentionally or inadvertently, change your Nova settings.

I tried using a few different app locks out there, and despite Nova Settings widget sitting in the drawer, those app locks don't recognise the widget as a seperate entity in the list of apps to lock, that they bring up, from your device. Instead, only the Nova Launcher widget itself shows. But if I select it, any app lock will just lock the whole launcher and I need to unlock the launcher every single time I do anything on it. And that is tediously annoying!

I know that the dev was away on personal matters for a long while in the past and subsequently had not worked on updates for that time. He had responded to my inquiry about this several months back citing that he may include settings password protection in the future.

I have a Samsung GS4 dual sim. It is rooted, and I have Xposed Framework and several working modules on the phone. My apologies if this post is too long. I'm new and will aim to keep queries shorter in future.

Locked out. Phone asking for google password

A guy i know has an s6 edge +. He told me that even after hard reset, it still asks him for his google password, which he does not remember because when he setup the phone, he did it with a new gmail.
So, now that he is locked out, is the only solution to flash the stock firmware through odin? If yes, where can i find stock firmware for s6+? Is it the same as s6 firmware?

Thanks!