Smile Sprint LG G Flex WiFi tether

[First time posting]

Since I bought my phone and got it rooted I have been looking for a way to get the WiFi tethering to work. I have searched around a lot for different solutions, and bricked one phone. Although I am pretty sure I have tried this app [WiFi Tether Router] in the past and it didn't work, I tried it yesterday and now it works except it seems to freeze on larger downloads after a while. But, for general browsing and Netflix it seems to do just fine.
I do have the paid version of the app.

Phone Details
[Maybe too detailed?]

Sprint LG G Flex
Android version: 4.4.2
Baseband: M8974A-AAAANAZM-2.0.20049
Kernel version: 3.4.0
Software version: LS995ZV6