My ZTE Warp Sync Will not power on all the way

[UNICORNJEFF GOD UNICORNJEFFGOD]

Hello um i need help fixing my ZTE Warp Sync i recently rooted it and then i was stupid enough to replace the 4.4 system ui with a 5.1 lollipop system ui when i did that my phone said com.systemui. has stopped then i restarted it and then it would not get pass the android logo i tried resteting it multiple times and it still did not work plz help asap thanks also i do not have TWRP or Cyanogen recovery installed so i cant reinstall the same firmware that i downloaded on the internet plz help i dont know what to do

 

[pkcable]

WAY above my paygrade, BUT it sounds like you'll need to install that ADB tools on your PC and then find (IF YOU CAN) the correct version of Android for your phone model (I could not find it on the ZTE site, must be too ancient). THEN you can install it to the phone from your PC, it's NOT the easiest process in the world.