question

[casian85]

if my phone doesn't have wcdma gsm 900 band can it be added somehow?

 

[chanchan05]

Nope. It's the antenna. Like how a bluetooth antenna can't receive wifi signals. Hardware stuff.

 

[casian85]

can't that be changed?

 

[Hadron]

What, the antenna? RF tuning is a tricky business. I'd not be confident of a plug and play replacement working properly, nor of it being legal (you'd have an uncertified transceiver after such a mod, working in regulated bands).

Plus the phone would at least require different radio firmware, but many would require chips changing as well.

There have historically been a few odd cases where it's been possible to do such things, but they've been ones where the phone hardware supported the band & protocol but it just wasn't enabled in software. In general the answer really is no.

 

[casian85]

GSM 850/900/1800/1900 MHz + WCDMA 850/2100MHz is in phone description,but i got no acces to wcdma 900 band.a change of soft coul'd resolve problem?

 

[Hadron]

Almost certainly not. Sorry.

 

[casian85]

ok...thanks