you Downloaded firmware for Huawei Y7 TRT-L21 with build Huawei Y7 Prime ( Honor 7 ) TRT-LX1 TRT-L21 p4 pl Toronto-L21C09B163CUSTC09D001 Firmware 7.0.0 r1 EMUI5.1 05014PJA
Huawei Y7 TRT-L21 Published on Released 2017, July . with Android 7.0; EMUI 5.1.
Display size on Huawei Y7 is 5.5" and the resolution is 720x1280 pixels

You can flash The Stock firmware of TRT-L21 using This Guide.
more about Huawei Y7 TRT-L21:

this model of huawei powerd by Octa-core 1.4 GHz Cortex-A53 and the internal storage size and ram size is 16GB storage, microSD card slot.
also it can support microSD, up to 256 GB (uses SIM 2 slot).
besides it can support Single SIM or Hybrid Dual SIM .
the Gpu chip model is Adreno 505 and also the Chipset model used on this model is Snapdragon 435
The camera on the Huawei TRT-L21 comes with and support 1080p video pixles.