No offence, but you didn't really answer my questions? Not trying to be rude. Heh. I'm asking how to do it, and from what I've read - rooting a Note 2 on Kitkat as mine is is impossible? How do I root it to change the bands to get 4G LTE? Also,
Why can't I access my voicemail???
You can't root if you took the OTA. So you are stuck using what you have.
Not sure about the voicemail thing.. What do you mean you can't access it? You said:
What are you expecting to do? Dial #1?
That wont work anymore. So just save the number you have above and save it as a contact name "voicemail"..
Also the numbers to edit the preferred network is *#*#4636#*#*
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