Root Need apps

[AndroidHogs]

I deleted some apps and I think I delete data manager and I think that controls 4g lte settings

 

[AMOCO]

I deleted some apps and I think I delete data manager and I think that controls 4g lte settings

Well if you can't get the Data manager,You can install this custom rom
This is a custom rom for your phone:
[Stoked Rom] ZTE Mustang Z998

 

[AMOCO]

Well if you can't get the Data manager,You can reinstall stock rom and start over.
This what I had to do with serveral times with pretty much all my phones.This is a custom rom for your phone:
[Stoked Rom] ZTE Mustang Z998

Still looking for a stock rom for you.

Edit:BTW,You didn't make a backup before you started deleting things?
I can't find any stock nandroid for your phone

 

[AMOCO]

This looks to be the stock rom here"
[Stock Rom] ZTE Mustang Z998

 

[AndroidHogs]

I don't even have custom recovery yet lol