LG G3 received lollipop update Wednesday. Takes about 20 minutes to dnld and install. Don't know if I like it. Phone seems to run slower, pages take longer to open. Home touch buttons are different. I'll try it for a while and maybe go back to KitKat.
Mine did that in the start but after a restart it works just as smooth and don't have any issues with slowness or pages take long to load. Unfortunately the only way to revert back to Kit Kat is if u root the device. There is no other way.
According to the link for the website you posted above, the LG G3 D851, uses the following GSM Bands : 850/900/1800/1900. The LG G3 D852, we currently carry, uses the following GSM Bands : 850/900/1800/1900.
Therefore, it would be safe to say that you could most likely use that device on our network, if it is unlocked.
However, keep in mind that the performance of the device cannot be guaranteed.
We currently offer the LG G3 at $0 on select 2-year plans; Why don't you look into upgrading your current device with us instead of buying an unlocked T-Mobile phone? You would get a 12 months manufacturer warranty!