Support for LTE band 4 - Verizon Samsung Galaxy S III

The Verizon Samsung Galaxy S3(I535) has the Qualcomm Snapdragon S4 plus MSM 8960 processor. The Qualcomm MSM 8960 is capable of supporting LTE band 13 and LTE Band 4(AWS).
The S3 only supports LTE Band 13
Q1. Is there firmware that will make this device support LTE Band4(AWS) also?
Q2. Is there a SW to make VOLTE calls using the S3?
I am looking to unlock LTE Band 4(AWS) on my VzW GS3.
Thanks in advance,

I don’t know anything about the bands but if I'm correct volte is unsupported. I don't think any of the major carriers even support volte.
Sent from my QMV7A using Tapatalk

Verizon does in NYC. You need the right flash.

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SolarTrans said:
The LTE frequencies used by AT&T (850/1800MHz) are the same as the LTE frequencies used on these phones (also 850/1800MHz). Considering these are unlocked phones, could I use them with AT&T's LTE network in the USA? I'd love to get some of that Snapdragon 800 power in the S4 but not if I couldn't use LTE.
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