hTc desire 700 dual sim stuck at black screen after hTc logo.

In my htc desire 700 dual sim 709d, I replaced previously copied build.prop file overwriting new one. restarted device and it stuck at htc logo with black screen after it. unable to find stock rom. tried one or two but they resulted mismatches. I'm able to enter the bootloader menu but no stock recovery and even found cwm recovery not working. Boot loader is ready to lock/unlock it is unlocked now. my device wast rooted when it was ok. for a long time I am also seeking for s-off and super CID. tried one or two methods but it says lower hboot version.
Now I think the only way seems that I have to upgrade hboot for s-off and super CID only.
Q-1- My question is that which, how and from where I can get hboot for up gradation?
Q-2- How to s-off and get super CID?
Q-3- Which step of both the questions required to be perform first or kindly help with complete steps and methods to gain s-off and super cid.
details of my device is given below:-
Bootloader - UNLOCKED
HBOOT- 0.31.0000
OS- 1.85.720.2
eMMC- boot 1024MB
Dec 6 2013, 17:08:24.27621

thanks & regards.

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