[Q] International Samsung Galaxy Note 4 Major Issues with Rooting topic

I bought this unlocked international note 4 with a plan to root it....

However it has already been rooted....

I have ATT for service. The person I got it from had T-Mobile.

When I put my sim in and start it up I can make calls and send text as well as even get online

The problems are as follows:

1. It does not stay connected to the ATT network, I have to repeatedly hit send over and over till it finally makes the call... The same goes for text and the internet...

2. When I made the attempt to re-root the whole thing (mind you I am new to all this rooting...this would only be my second time doing so) I found after downloading all the software needed to do so.... I began to follow the steps provided here on XDA, when I tried to boot with the volume, center, and power key the menu is in Chinese sooooooo

........ So now I'm at a complete loss... I do not know what to do
Please tell me that one of you geniuses out there can help me solve this dilemma.....

I was hoping that just re-rooting this phone would solve my problems........

Thank you guys