[Android Q&A, Help & Troubleshooting] jm2014:
My cousin got me this phone from China. According to him, the phone model is Coolpad 7296.

The first problem seems to be that the phone is actually different from the official Coolpad 7296, which is shown in the first attached image. But my phone looks more like the second attached image. I have the link for both phones the official site and a online seller selling a phone 99% like mine while claiming it to be a Coolpad 7296. I can't post the links due to the forum policy requiring me to have a least 10 posts. In other words, there is a very good possibility that my phone is not a legit Coolpad or it may be a variation of the Coolpad 7296.

When i first wanted to unlock the bootloader to root my phone, it was impossible. After booting to fastboot mode, any fastboot command would get stuck. For example, if i did the following:

Or if i tried erasing the user data:

Later, I was able to root the phone via a Chinese app which literately translate to "Baidu One Click ROOT". After some playing, i tried to flash the phone via fastboot, then i literally broke the recovery mode. Most likely, the recovery partition was damaged. After more playing around, i broke the system image. I was still able to boot to fastboot mode back then. Afterwards, i broke fastboot mode as well.

After some time, i was able to install the VCOM Preloader USB Drivers by disabling the digital signatures required for installing the drivers in Windows 8. Then, I flashed the phone using the SP Flash Tool and an official ROM of Coolpad 7296 manufacturer. I am able to turn on the phone and the screen would light up in a black blank screen. The computer is able to recognize the phone via USB and i am able to use ADB commands as well as ADB Shell on it. In addition, i downloaded a program called 刷机精灵, which is a ROM flash tool for Chinese phones. This program is able to show exactly what was supposed to be showing on my phone screen. If i press the Power Button, it shows the phone's pop up window asking for if i want to power-off, reboot or put in airplane-mode. The screenshot is shown in the third attached image.

Sorry for the long post but i thought it would help if i told the whole process. Now are the real questions:

1) I never backed up my phone. So, i can't get it back to the original ROM i had. I wonder if it is possible that the screen doesn't work because the phone doesn't have the right radio image with the proper drivers. I mean, I could assume that the phone is a variation of the current official Coolpad 7296, and it is not compatible with the current official ROM.

2) Or, what are the chances that i burned my screen by charging the phone when the recovery and system images were dead. At that time, the phone could only work on fastboot mode and i left it charging overnight. Next day, the phone camera was extremely hot. And i am not sure if fastboot mode was dead first or the screen stopped showing stuff first.

3) Right now, the phone cannot reboot to neither recovery or fastboot mode (no matter how much i try with the ADB reboot or power & vol key press methods). I believe that the possibility of a somewhat incompatible phone radio, recovery and fastboot images are the cause of my current problem. So, i wonder if anybody have the same phone and know a compatible ROM.

Edit: I also want to mention, that i tried to flash the phone with other official Coolpad ROMs too. The only one that were flashable ere Coolpad 7295 and 7296. When i flash it with Coolpad 7295, i have the same problem plus the phone cannot see my SD Card. On the other hand, when i flash it with Coolpad 7296, i recognizes my SD Card. I have confirmed this via ADB shell and i can see my old files in the SD Card too.

Edit2: Another things i wanted to mention was that when i entered to fastboot mode in the past, the device id was mt6589_phone_720pv2 which means the cpu must have been a mt6589 chipset. However, i remember that when i ran a phone hardware app, it showed that the CPU was a 2.0Ghz mt6592 which was weird. And when i check online, mt6589 the CPU freequency is 1.2Ghz. On the other hand, documents online show that mt6592 has 2.0Ghz frequency but it is a octa core. My phone is definitively a quadcore.