hi help 3g in 1900mhz

[atv]

hi i read here in a post that mytouch 4 slide is a 3g in 1900 1700 2100, but according to gsmarena it comes only with 3g 1700 2100, as some tmobile units, my questions are:
does anybody knows the real configuration (only 1700 and 2100, or not)?
is there any radio that comes with 3g 1900mhz, even if its not from mytouch 4g slide, maybe other cause i think that the hardware will work in 1900 as 3g instead of only edge like in 850mhz?
is there any secret code to activate 3g band options?
thank you very much indeed

 

[demkantor]

I would trust the gsm arena spec sheet, but haven't confirmed the bands myself. And not you cannot just add bands, they are interdependent of the radio in that sense, you can not add or remove them

Sent from my Nexus 7 using xda premium

 

[Ohgami_Ichiro]

To make it easier instead of using the Freqs (Because they overlap with other bands) here are the Bands that the mT4GS uses: Band 1 and Band 4.

Your confusion comes from T-Mobile refarming the 1900 MHz for 3G. This is the one at&t also uses. It is Band 2.
The mT4GS will not work on Band 2 in 3G only 2G. The hardware was made for Bands 1 and 4.

Use this chart it should clear up the confusion:

http://en.wikipedia.org/wiki/UMTS_frequency_bands