I have a long story...and hate to take your t much of anyones time.
I have a NOTE 3, which I purchased about a month ago... I live and play in Mexico, I bought an unlocked NOTE 3 T-Mobile N900T.
I installed kies and one day it came thorugh withan upgrade/update I didn't notice and accepted it, it was 4.4.2.
I had good acceptable transfer rate using 4.3 as it came... afterwards my H+/4G/LTE are from 500K - 3M if that... and my upload is 1M.
I then rooted and tried various roms as well as various Kernels... and can't seem to fix the problem... If there is a ROM or a fix and I could work with someone, I would gladly contribute to get it working.
In Mexico Telcel has the N900W8 I tried flashing the 900W8 ROM into my N900T and it didn't work...
Presently I am using... Vision X- N3 KK 4.4.2 ND5, Kernel: CIVz-snapkat Rev 1.9-N900T
I have tried numerous KErnels and various roms... with no joy...
Please help... some one... I would like to talk over email my email is email@example.com or Whatsapp (Mod edit: Phone # removed)