If you notice any software malfunctions with your YXTel C8 (8MP) android device, you're most likely required to download and flash stock ROM firmware on your C8 (8MP) to permanently correct the software errors you noticed on your YXTel C8 (8MP). And when you load stock firmware on your YXTel C8 (8MP) using any Qualcomm flash tool, your YXTel C8 (8MP) will be reset to factory defaults settings and by that, definately, your UserData will be lost including contacts, messages and others.
If your device has been bricked and want to unbrick it, you will need to pay closer attention to the tutorials contained below here.
YXTel C8 (8MP) Stock ROM Firmware Download Link(s)
How to Flash Stock Firmware On YXTel C8 (8MP)
1. Download your YXTel C8 (8MP) stock ROM firmware from the link above.
2. Extract the YXTel C8 (8MP) Firmware you downloaded from the link above onto a folder on your PC.
3. Download and install Qualcomm android device drivers on your PC. You may skip this step if you have installed Qualcomm drivers on your PC already otherwise, download Qualcomm drivers here
4. Now, choose either of the tools listed below here to load the stock firmware on your YXTel C8 (8MP).
Note
1. Each of the tools listed above contained step by step guides with illustrated pictures on how to flash stock firmware on your YXTel C8 (8MP).
2. If your device is bricked already, I recommend that you use Tool Studio eMMC Download Tool or QPST QFIL.
3. If you require any further assistance, simply drop your comment detailing the issue(s) and I shall help you revive your YXTel C8 (8MP), if need be.