Anyway to disable Band 4 LTE?

The phone keeps switching over to Band 4 from Band 13. When it does this, the upload bandwidth slows to a crawl and makes the web fairly useless. Is there a way to force Band 13 or disable Band 4? I know you can on some LG and Samsung devices.
Does the programming menu allow that? I still haven't figured out how to access the program menu.

S6 Edge+ dual sim (SM-G9287) root help or anyway for internatinal stock keyboard

Anybody can help me on rooting this phone, or anyway to install stock samsung international keyboard? The device itslef has only chinese keyboard and lack Thai language keyboard anyone knows how to install international samsung keyboard please suggest

Anyway to ROOT new Z3v 5.0.2. NON-PREROOTED version?

I had my Z3v rooted on 4.4.4. but once I flashed 5.0.2. I realized I didn't do the pre rooted version. Anyway to Root the non pre rooted 5.0.2?

Thank in advance!