GSM Frequency Change, dual-band to quad or tri-band

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Greetings, can anyone please tell me if there is any way to get my T-mobile device to recognize other GSM frequencies? It is currently a dual-band pocket pc device and I would like to make it such that it recognizes the 850 Cyngular frequency in the US. In other words, how can I make my dual-band device a quad or tri-band device?

Re: GSM Frequency Change, dual-band to quad or tri-band

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Originally Posted by ksymeonides

Greetings, can anyone please tell me if there is any way to get my T-mobile device to recognize other GSM frequencies? It is currently a dual-band pocket pc device and I would like to make it such that it recognizes the 850 Cyngular frequency in the US. In other words, how can I make my dual-band device a quad or tri-band device?

Hmm. i would say only by soldering. It's a hardware limitation of the device...

Stefan

The MDA/XDA II device is already tri-band.

or did I missunderstand you?

greets Alex

Originally Posted by alexball

The MDA/XDA II device is already tri-band

That's right. But the MDA/XDA I is only a dual band phone.....


Stefan

Yeah, my device is only dual band. I thought that perhaps all these devices initially had the potential or ability to pick up any signal but that it was a software issue to actually start doing so. I am not too good with the techy lingo, but is there something called "soft phone"? I can't imagine companies manufacturing very similar phones overseas and in the US and the only difference being that one is dual band and the other tri band. It makes sense that these devices are all quad band and the company places limitations on them depending on where they are purchased

no the HF VHF and UHF and so forth need a frontend which cant just be programmed like that it have to do with filters and such as in before the signal ever get close to being digital and programmable

GSM BAND SWITCHING SOFTWARE

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DOES ANY ONE KNOW WHERE CAN I GET A HOLD OF THIS? THANKS

hi Rudegar

can you shed a little more light on the filters and hardware change that would be required to change a frequency or activate another if the chip has it. ( sometimes it is capable but not activated )