[Device Reviews and Information] cracktech:
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I just got my HT70 and had already reflashed it 5 times in order to find a method to flash TWRP recovery. But I got my phone with a flaw it doesnt respond to recovery using Vol+Power buttons and it always shows a blank screen out of the box.

But a word of CAUTION here! There are many claims to TWRP for "HOM TOM HT70" from TWRP 3.1 to TWRP 3.2.2 and I found out the hard way when I tried to flash the 3.2.2 version that it was a dud. It got my HT70 into a frozen state stuck at boot up screen forever even its size is questionable the stock is 12k but the TWRP 3.2.2 is 16k normally difference in size are 15-25% only. So be careful what you try to flash on your device.

But I have unlocked the bootloader successfully and I can confirm it is permanent even after a reflash of the ROM (using "download" , I have not done an "upgrade" reflash after unlocked in SPFLashTool)but you will have a slightly "dirty" boot up screen with " Orange State - Your device has been unlocked and cant be trusted" message written on "HOMTOM" colored boot up logo. (lucky thing it is in a very tiny font).

The best I can think of doing is temporary reboot into TWRP without flashing(if you found the correct one) and doing your operations from TWRP and after reboot it is back to stock recovery. ( Oh! wait I cant even access my stock recovery!)

I did all my operation on Win 10 Pro x64 using Windows PowerShell (Admin) - less headache. I found my \adb folder somewhere in my C:\Users\**yourname**\adb\ and since Windows PowerShell (Admin) defaults to C: Windows\system 32\, I copied the adb folder into that address and as you can see all my commands were executed from there. ( the reason I used PowerShell (Admin) is because it is an elevated privilaged command and on some occasion using normal PowerShell it will request for an Admin privilage.

If you are having problems "boot unlocking" (seems like the PC is waiting on you and you waiting on PC) assuming that you got everything correct upto "fastboot oem unlock" and hit enter. You actually have to immediately press the "Vol +" button. and within a split second it is unlocked permanently.

I even managed to flash recovery but it was a dud. I am really puzzled as to all this prolifiration of TWRP recovery supposedly for HT70 because the model was only launched in April then suddenly by June/July there were many claims that they had TWRP ported to HT70 already. Based my other MTK unlocked/no lock bootloader models especially my favorite Lenovos it will take at least a few month for a dedicated modder to mod a TWRP recovery (that is if he happens to buy the same model as us and he has free time) Please remember HT70 is a 4Gb/64Gb MTK 6750T model and if I am not wrong, there arent many 6750T 4Gb/64Gb models floating around and 6750 and 6750T would require different version of TWRP.

I would have to ask my MTK specialist friends to see whether they are willing to help out. But nobody is working on TWRP as far that I know.If you still insist then try a temporary boot into TWRP rather than flashing these questionable TWRP (especially if the website is based in India).

If you trying to flash or just reboot or flash anything on your gadget , please ignore other forum advise that you copy the "recovery.img" or "**.img" into the same folder i.e. in ":\adb" folder it will give you error message [ cannot load '**.img' : No such file or directory ]. For me to make it simple I copied whatever *.img file onto my root D:\ directory and there immediately got no error message. Thats all folks! I will visit again when I have an actual working TWRP and root methodoloy in the future hopefully somebody would beat me to it.