Dual band phones - a question

05-07-2004, 21:32

As T mobile and Orange are on 1800Mhz and O2/Vodaphone are on 900Mhz how does your phone work efficiently on both bands?

The antenna has to be the right length for the wavelength (this is especially true when transmitting)......so, are there 2 antennas?

Everything Goes · 05-07-2004, 22:45

A full wave lenght antenna for 900Mhz is 33cm on 1800Mhz its 16cm. It is likely that the antenna will be 8cm which is a quarter wave on 900Mhz and a half wave on 1800Mhz. Therfore a single antenna will be resonant on both bands.

ney · 06-07-2004, 06:43

when I goto Holland for a few days will I have yo puick the net work thats listed on the 02 website with 900Mhz as the other 2 out of the 3 listed is 1800Mhz. I got a Sony Ericsson T230 on 02 pay and go. It may use band 900Mhz but how do you fined this out.

Darren

jonat8 · 06-07-2004, 06:54

The T230 is a dual band 900Mhz and 1800Mhz phone. O2 has roaming agreements with many networks over there - Vodafone, T-Mobile and Telfort. The phone should be able to register on all of them.

So I think you should have no problem at all. The phone should automatically try and select a network. And the charges should be the same regardless of which foreign network you are roaming on - £0.99 to UK landlines/O2, £1.49 XNet, £0.49/txt.

ney · 06-07-2004, 19:19

Quote:

Originally Posted by jonat8

The T230 is a dual band 900Mhz and 1800Mhz phone. O2 has roaming agreements with many networks over there - Vodafone, T-Mobile and Telfort. The phone should be able to register on all of them.

So I think you should have no problem at all. The phone should automatically try and select a network. And the charges should be the same regardless of which foreign network you are roaming on - £0.99 to UK landlines/O2, £1.49 XNet, £0.49/txt.

Thanx for the info. Dose it cost you to receive a text or a call while in Holland or any other part of Europe.

Darren

jonat8 · 06-07-2004, 20:24

Calls - yes. Texts - I don't think so, no.

05-07-2004, 21:32	#1
Pioneer31 Posts: n/a	Dual band phones - a question As T mobile and Orange are on 1800Mhz and O2/Vodaphone are on 900Mhz how does your phone work efficiently on both bands? The antenna has to be the right length for the wavelength (this is especially true when transmitting)......so, are there 2 antennas?

05-07-2004, 22:45	#2
Everything Goes Forum Member Join Date: Mar 2002 Location: In the future.... Posts: 11,259	A full wave lenght antenna for 900Mhz is 33cm on 1800Mhz its 16cm. It is likely that the antenna will be 8cm which is a quarter wave on 900Mhz and a half wave on 1800Mhz. Therfore a single antenna will be resonant on both bands.

06-07-2004, 06:43	#3
ney Forum Member Join Date: Jun 2002 Location: Scotland, Dunfermline Area Posts: 10,704	when I goto Holland for a few days will I have yo puick the net work thats listed on the 02 website with 900Mhz as the other 2 out of the 3 listed is 1800Mhz. I got a Sony Ericsson T230 on 02 pay and go. It may use band 900Mhz but how do you fined this out. Darren

06-07-2004, 06:54	#4
jonat8 Forum Member Join Date: Oct 2002 Location: Norwich Posts: 1,584	The T230 is a dual band 900Mhz and 1800Mhz phone. O2 has roaming agreements with many networks over there - Vodafone, T-Mobile and Telfort. The phone should be able to register on all of them. So I think you should have no problem at all. The phone should automatically try and select a network. And the charges should be the same regardless of which foreign network you are roaming on - £0.99 to UK landlines/O2, £1.49 XNet, £0.49/txt.

06-07-2004, 19:19	#5
ney Forum Member Join Date: Jun 2002 Location: Scotland, Dunfermline Area Posts: 10,704	Quote: Originally Posted by jonat8 The T230 is a dual band 900Mhz and 1800Mhz phone. O2 has roaming agreements with many networks over there - Vodafone, T-Mobile and Telfort. The phone should be able to register on all of them. So I think you should have no problem at all. The phone should automatically try and select a network. And the charges should be the same regardless of which foreign network you are roaming on - £0.99 to UK landlines/O2, £1.49 XNet, £0.49/txt. Thanx for the info. Dose it cost you to receive a text or a call while in Holland or any other part of Europe. Darren

06-07-2004, 20:24	#6
jonat8 Forum Member Join Date: Oct 2002 Location: Norwich Posts: 1,584	Calls - yes. Texts - I don't think so, no.

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Dual band phones - a question