Current Diamonds May have 850band!?!?

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So I'm talking to one of the prominent Cell Phone Hackers / Repair guys in the city. Apparantly, he ripped open a diamond and it had the same chipset as the 850 diamond will have in it. He is saying that a ROM Update could unlock that frequency.

I debated with him stating that the chipset may be the same but there is no 850 antenna on it. He disagrees.

Any thoughts on this?

Originally Posted by WorldIRC

So I'm talking to one of the prominent Cell Phone Hackers / Repair guys in the city. Apparantly, he ripped open a diamond and it had the same chipset as the 850 diamond will have in it. He is saying that a ROM Update could unlock that frequency.

I debated with him stating that the chipset may be the same but there is no 850 antenna on it. He disagrees.

Any thoughts on this?

i think he might be right since the preproduction had the band, though no one did ever test a preproduction to see if the band actually worked.

Originally Posted by Pawel062

i think he might be right since the preproduction had the band, though no one did ever test a preproduction to see if the band actually worked.

Engadget tested it, it didnt work.

A 900Mhz antenna would still work on the 850 band, it just woundn't be optimal, and you would end up with lots of harmonics. SNR would be lower, and the amplifier would end up at full strength most of the time, increasing the SAR.
Because of that they remove the calibration settings of the 850 band from the radio. Even if you changed the flag to enable the band (easier) you would need to somehow recreate all the calibration data (much harder).
Calibration data is specific to each device, so a flash from the US diamond rom (when/if its available) wouldn't be enough.

Its possible you could clone the calibration data from a US version of the diamond, but by then whats the point, just get a US version instead of frying your brain

Originally Posted by someone1234

Its possible you could clone the calibration data from a US version of the diamond, but by then whats the point, just get a US version instead of frying your brain

I guess some people just like their brain well done

Maybe it's for the situations when people try to get a device for cheap, or 2 weeks before everyone gets it, but then they realize that it won't work in their country.. as it should