Just switched to XT, I know it's wcdma, but...

Forums › Spark New Zealand (including Skinny and BigPipe) › Just switched to XT, I know it's wcdma, but...

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#316472 9-Apr-2010 11:04

It'll work on XT, but only in the main centres where XT has 2100 3G. Otherwise make the best use of your phone and stay with Vodafone?? Sounds pretty logical to me.

Only the specific TP2 handsets supplied by Telecom NZ, Telstra NextG or AT&T will work correctly on XT as these are specific 850/2100 3G handsets. The Telstra and AT&T handsets would still need to be firmware flashed to ensure full functionality on XT.

As already mentioned in this thread and various other threads here about the Touch Pro 2, no amount of ROM flashing will make a 900/2100 handset into 850/2100 handset.

Dont cry, go back to Vodafone otherwise sell it and get one from Telecom NZ

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mm1352000

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#316686 9-Apr-2010 22:41

Hi folks. Just curious as to what exactly would be required to change the 3G frequencies that a phone supports? I mean, when a handset has 2 versions to support different sets of 3G frequencies, what are the *physical* differences between the 2 models:
- different aerial lengths?
- different RF filtering circuits?
- different frequency generator circuits?
- different 3G chipset?
Surely this must be annoying for manufacturers! Why can't they create single handset where the supported 3G frequencies are determined by the firmware? Further, I have been wondering if there is a technical reason why there are currently no phones that support WCDMA 850 and 900 in the same handset. Is it because the 850 downlink band overlaps with the 900 uplink band?

quickymart

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#316688 9-Apr-2010 23:10

There aren't any yet...but once upon a time, GSM handsets only supported one frequency too. Give it time, it'll happen.

old3eyes

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#316728 10-Apr-2010 09:58

It will most likely happen as Chinese operators like China Mobile (and others) upgrade to 3G Currently CDMA with 600Mil custs.

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Old3eyes

sbiddle

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#316730 10-Apr-2010 10:07

mm1352000: Hi folks. Just curious as to what exactly would be required to change the 3G frequencies that a phone supports? I mean, when a handset has 2 versions to support different sets of 3G frequencies, what are the *physical* differences between the 2 models:
- different aerial lengths?
- different RF filtering circuits?
- different frequency generator circuits?
- different 3G chipset?
Surely this must be annoying for manufacturers! Why can't they create single handset where the supported 3G frequencies are determined by the firmware? Further, I have been wondering if there is a technical reason why there are currently no phones that support WCDMA 850 and 900 in the same handset. Is it because the 850 downlink band overlaps with the 900 uplink band?

The reasons have been purely technical.

The good news is that multi band chipsets supporting 850 and 900 are now available and there are data cards that support both bands (Telecom already sell one). Word is we'll definately start seeing phones supporting both bands towards the end of this year from major manufacturers.

cokemaster

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#316738 10-Apr-2010 10:55

old3eyes: It will most likely happen as Chinese operators like China Mobile (and others) upgrade to 3G Currently CDMA with 600Mil custs.

China Mobile (biggest mobile provider in China) operate a GSM network. They are building a td-scdma network.
China Unicom operate a GSM network and WCDMA network.
China Telecom operate a CDMA network (used to be China Unicoms network + customers)

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old3eyes

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#316790 10-Apr-2010 14:08

cokemaster:
old3eyes: It will most likely happen as Chinese operators like China Mobile (and others) upgrade to 3G Currently CDMA with 600Mil custs.

China Mobile (biggest mobile provider in China) operate a GSM network. They are building a td-scdma network.
China Unicom operate a GSM network and WCDMA network.

China Telecom operate a CDMA network (used to be China Unicoms network + customers)

Thanx for the info..

Regards,

Old3eyes

reekydesert

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#316858 10-Apr-2010 18:45

hi all,

i just attached a screen dump from my TP2, it's the band selection option screen.
in the band frequency part, there's one UMTS (900+2100) - i assume this one works with vodafone? another one is: UMTS (1900+850) - this 850 UMTS is supposed to work with XT network? but what i can't understand is: 2100 and 850 are not in one selection, is this why my TP2 works in city but not eastern suburbs? can't it change automaticly to whatever band frequency is needed?

i posted earlier that from HTC.com, euro/asia version TP2 supports 900/2100 MHz, but my phone has 850, perhaps it's not euro/asia version?

Sbiddle said that "Word is we'll definately start seeing phones supporting both bands towards the end of this year from major manufacturers." hopefully when i buy another set at the end of the year, i won't have to worry about this band frequency thing!

reason of not buying a telecom phone is the price's too high. and reason of not changing back to vodafone sim card is: i'm actually a telecom employee and the sim card is free with calling/txting/3G data usage, so....

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reekydesert

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#316859 10-Apr-2010 18:46

eh? the pic wasn't attached.
the link is here:
https://cdn.geekzone.co.nz/imagessubs/blogd3a2c17e2cf1e72f6bb63a8294390093.jpg

sbiddle

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#316860 10-Apr-2010 19:00

These are simply OS menu options and not related to the hardware.

There are 3 versions that do 850 - the AT&T one, the Telstra model and the Telecom NZ model. Both the AT&T and Telstra models have customised operator software. If your phone was an 850 model it would work - the fact it doesn't indicated you have the 900 model.

Damager

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#316863 10-Apr-2010 19:05

sbiddle: These are simply OS menu options and not related to the hardware.

There are 3 versions that do 850 - the AT&T one, the Telstra model and the Telecom NZ model. Both the AT&T and Telstra models have customised operator software. If your phone was an 850 model it would work - the fact it doesn't indicated you have the 900 model.

Correct-a-mundo as per sbiddle. They're just OS menu options unrelated to hardware.

I have a Telstra model and the same options exist in there too. I firmware flashed mine immediately so didnt have a chance to check the original options. I checked with someone who still had the generic Telstra firmware and it says exactly the same thing.

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reekydesert

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#317295 12-Apr-2010 12:42

sbiddle: These are simply OS menu options and not related to the hardware.

There are 3 versions that do 850 - the AT&T one, the Telstra model and the Telecom NZ model. Both the AT&T and Telstra models have customised operator software. If your phone was an 850 model it would work - the fact it doesn't indicated you have the 900 model.

hi thanks Sbiddle, so that option screen doesn't actually tell what frequency the phone supports... is there a way to find that out? say i want to buy anoher phone, how do i know if it supports 850 wcdma?

sbiddle

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#317337 12-Apr-2010 14:05

reekydesert:
sbiddle: These are simply OS menu options and not related to the hardware.

There are 3 versions that do 850 - the AT&T one, the Telstra model and the Telecom NZ model. Both the AT&T and Telstra models have customised operator software. If your phone was an 850 model it would work - the fact it doesn't indicated you have the 900 model.

hi thanks Sbiddle, so that option screen doesn't actually tell what frequency the phone supports... is there a way to find that out? say i want to buy anoher phone, how do i know if it supports 850 wcdma?

Presumably look at the product code on the phone and then Google it.

I have no idea what sort of product codes the WM devices use but Nokia label everything with a 1,2 or 3 after the product name to designate the band, ie E71-1, E71-2, E71-3

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#317349 12-Apr-2010 14:21

reekydesert: hi thanks Sbiddle, so that option screen doesn't actually tell what frequency the phone supports... is there a way to find that out? say i want to buy anoher phone, how do i know if it supports 850 wcdma?

If you are buying in store look at the label on the box - they will list the bands there, under the IMEI.

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PhoneChick

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#317364 12-Apr-2010 15:11

This will tell you if the device will work or not. Need the IMEI number first though. http://www.telecom.co.nz/mobile/ournetwork/phonecompatibility

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