I picked a a Galaxy S4 when I was in America. It is a slightly different model SGH-M919. I have rooted it and loaded a custom rom (wicked V7).
I really like it, the issue is I think the modem is not good T-Mobile version. M919uvuamdl Is the baseband version and it says I am connected at 4G all the time, but telecom does not have 4G yet.
Also when I do a speed test I only get 3Mbps where as on my SG II on 3G I would get around 18.
So something is not right here.
Which modem is a good one for NZ? J5? Because this is not as common a model I am finding it harder to find modems or maybe there is not other modems available.