Learn how to unbrick/flash this device using sp flash tool from here
Note
Follow the instructions on how to flash the device carefully from the link above
I will not take responsibility on whatever may happen to your device.
Make sure you are downloading the exact ROM of the device you want to flash because
flashing a wrong preloder, will make the device completely dead
(can't power on, can't charge and will not be detected by a computer)
TECNO 7C SPECS
Android 5.0 (Lollipop)
Dimensions - 216 x 124 x 8.7 mm
7-inch Touchscreen, 600 x 1024 , IPS 170 ppi
1.3GHz dual-core Processor
MT6572
Mali 400 GPU
1GB RAM
8GB Internal Memory
Supports up to 32GB microSD
2MP Rear Camera, LED Flash, Auto Focus
0.3MP Front Camera
Dual SIM
EDGE / GPRS
WCDMA
WIFI 802.11 b/g/n
bluetooth 3.0
3000mAh Battery
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Report if you cannot download this file.
ADS HERE !!!