Develop Bugs

HTC DESIRE 8181 V's 8183 NEXT G DESIRE:

i found this on another forum. thought it be good for the confused ones thinking of buying. hope this explains a little better
So your looking to pick up a HTC Desire of eBay reasonably soon.
Is there any difference between Aus (delivered/imported 8181 Desires on eBay) vs NextG 8183 branded HTC Desires sold on eBay ?
because The NextG 8183 ones on eBay are currently fetching approx $100 more than none NextG 8181 Branded ones.
Q:
Is there any difference between Aus delivered/imported Desires (on eBay) vs NextG branded HTC Desires sold on eBay. From what I can tell they should all support the same frequency space, so there shouldnt be any difference.
A:
There are two different models of Desire....
Telstra sells one that supports UMTS 850/2100 The actual Telstra Next G branded ones have got some Telstra "Apps" loaded into the ROM which cannot be easily removed, however they are simply links to Telstra services. They are unlocked.
Models sourced overseas usually support UMTS 900/2100, which won't work on NextG.
Pick wisely.
Q:
The NextG Versions will still operate on Optus/Voda/etc right? The frequency ranges all seems to match up. Some online stores are selling NextG and none NextG versions, just dont want to shoot myself in the foot.
A:
Yes, the Next G version will work on Optus 3G, but only in metro areas. It does not support the 900 MHz frequency used by Optus or Voda in regional areas, meaning outside city, you'll only get 2G.
It does not support the 900 MHz frequency used by Optus or Voda in regional areas
Hmmm ok, thats weird because according to the HTC Site (and this is where im getting confused) with all the "Exclusive to Telstra NextG" Branding, it supports the following
HSPA/WCDMA:
* Australia: 850/2100 MHz
GSM:
* Australia: 850/900/1800/1900 MHz
Q:
Do they cripple the NextG version and rip out the 900mhz ?
A:
Australia: 850/900/1800/1900 MHz
Those are GSM frequencies, not UMTS.
To make it abundantly clear:
Telstra specs:
HSPA/WCDMA:
•Australia: 850/2100 MHz
GSM:
•Australia: 850/900/1800/1900 MHz
Optus specs:
HSPA/WCDMA:
•Australia: 900/2100 MHz
GSM:
•Australia: 850/900/1800/1900 MHz
3G is around the world but Yes the US carrier At&T use it..
To help you, AT&T use the 850MHZ band while the other mobiles providers (ie T-Mobile) all use the 900 etc if you are grey importing a US phone the rule of thumb is if the phone works on AT&T then it will work on Telstra 3G network..
Telstra have two different 3G networks and they are 'branded' differently, yet they are both technically 3G at the end of the day.
1. Telstra 3G = 2100mhz, is only implemented in metropolian areas.
2. Telstra NextG = 850mhz, is implemented Australia wide and superceeds their 2100mhz implementation.
As you can see they are both 3G. The NextG branded product has more bandwith available to it, (not that 2100 doesn't have enough, just the way Telstra's implementation is).
Speed wise, telstra do have the fastest network, but in time, others will catch up. NextG is not some magical creative, even if Telstra subtly make you think that.
The issue with handsets is that they either come in 850/2100 variants (i.e compable on Telstra 850 3G) or 900/2100 variants (compatible with other networks in australia including the Telstra 3g branded service on the 2100 network).
Futher, this is not to be confused with similar GSM frequencies (then you get 2G coverage)
Q:
So is NextG just better coverage, or is it faster too? I was lead to believe there was a speed increase.
A:
Both.
The downside to having more coverage and web speed, is being stuck with Telstra..
If you have voda or Optus, you need the desire A8181.. if you're with Telstra you need the A8183
I have Optus meaning my phone model is A8181 & it's $100+ cheaper
CHEERS:

This is well written explanation, I'm sure it/has helped many ;-)
Sent from my HTC Desire using XDA App

Rural coverage for HTC Desire with 3 Mobile
I just want to clarify if the same is applicable with 3 Mobile as Voda have meraged. I'm a 3 customer and I'm moving to Trentham, Victoria. 3 and Voda have said there would be call and text coverage only in the area. 3 is bringing out the Desire later this month but I don't know which one. I've been told there's more Telstra towers in the area but will not swap suppliers as I have a good plan from when they were Orange. Thanx for the help.

If you get an 81 and use telstra, it will be slower.
if you get an 83 and use a Non-telstra network, it will be slower.
If you get an 83 on telstra, Root and grab T-Mod.
Simple! XD
</shamelessplug>

Hi there.
I am confused. I am thinking of getting A8183 and am a vodafone user. Will 3g work for me?

I'm pretty sure it says above only in metro areas mate
Sent from my CM7.1 Desire using XDA App

www.vodafone.com.au/personal/aboutvodafone/network/network-850/index.htm
vodafone going 850mHz

I have the 8183, rooted and running on LiveConnected (Optus). I have very little drama with mobile internet, regardless where I use my phone around Cairns.
I find I get drop outs if I venture too far west, but north to Pt Douglas/Mossman, inland to Atherton Tablelands/Millaa Millaa/Malanda and all the way south to Townsville (including Hinchinbrook region), signal is strong and on song.
I have never understood people that gripe about their 8183s not working properly on other networks...unless they happen to live in Oodnadatta, there should not be an issue.

[Q] Change Defy 3G Frequency?

Hello I live in New Zealand and we have a network here called Telecom XT which uses 3G freq: 850 & 2100 mhz.
Unfortunately all Motorola Defy sold here have their freq specified as: 3G Network: HSDPA 900 / 2100
I see in the development section there is a way to flash files to restore 3G coverage and one of the files has the 850 & 2100mhz that our Telecom XT network uses. Does this mean I can flash this file to enable those frequencies on this phone or does it mean that the Chinese versions of Defy have a different chip that supports the different frequency?

Hey,
Unless the Defy has a tri band WCDMA chip (which im pretty sure it doesn't) then you can't simply flash new radio firmware/RIL to enable frequencies.
If you want an XT compatible desire, your best bet is something from T-Mobile or more ideally Telstra Australia's NextG network, which is the same as XT. Mobicity for example sells NextG handsets which will work perfectly on XT.
If you have the 900mhz Defy i believe you are limited to Vodafone/2Degrees. Flashing these Radio/RIL fixes i think were because those with 850mhz handsets with issues running radios designed for 900mhz.

Just to confirm, Defy hardware can only do certain pairs of frequencies (e.g. as say mentioned on gsmarena.com) irrespective of what ROM is put on it ?
Is there anyway to find out (from model/serial number or other way) what hardware one has ? (for 3G frequency)
I'm pretty sure about mine, though I bought this Defy 2nd-hand and flashed it, so just wanted to be sure. (I flashed it with 900/2100 MHz ROM and it seems to work fine on T-Mobile 3G in London, UK. But wonder if there is a way to check - perhaps for another unit....)

HTC DesireHD radio questions

Hello,
I currently use a HTC Desire HD handset, so far everything has been awesome.. One problem is that the network provider I am using (Vodafone Australia) is pretty much hopeless. The alternative is to go with Telstra, however they use different HSPA frequencies to those that my handset supports.
Vodafone Australi - 900/2100
Telstra Next-G - 850
I have a few questions which I've been unable to categorically answer from other posts.
1) is it possible to flash alternative firmware for the radio?
2) is there firmware which supports Quad Band HSPA for HTC handsets?
3) What is the actual radio chipset used in the Desire and Desire HD?
I travel a fair bit around the world, the normal Australian vodafone frequencies work well in the EU and many parts of Asia, however If I do go with a Telstra frequency then I loose the roaming, hence the question about Quad Band HSPA/UMTS.
Regards,
Jimmy.

tha'ts a really good question, i want to know about that too.. and btw, who uses 850mhz frequency? wtf... =oP

Radio frequencies are hard coded into the cpu chipset, and thus cannot be changed by flashing a new radio
Sent from my Desire HD using Tapatalk

[Q] T-Mobile & Desire Revolution HD/12.54.60.25_26.09.04.11_M2 Radio

Hi everyone,
Was wondering if anyone was having problems with the following setup:
- Desire HD running Android Revolution HD 5.1.7 (will update later)
- T-Mobile
- 12.54.60.25_26.09.04.11_M2 Radio
Since flashing this radio/upgrading to this version of the Revolution HD rom about 10 days ago I've noticed a huge performance boost from the battery. However I think the radio is causing problems as I'm unable to send/receive MMS messages or have any 3G/HSDPA signal..
I've been over in Canada and noticed I was unable to get 3G speeds and was always stuck on Edge. I put this down to being in another country and Fido said I had the European version of the phone which wasn't compatible with their data network. I was a bit surprised because I figured the phone was compatible with all frequencies (as covered on the Tech Specs page of htc.com)but I'm not sure whether that lists the frequencies for say the "European" version of the phone *and* the "North American" version of the phone..

HSPA Frequencies in Europe (PCS): 900 / 2100
HSPA Frequencies in North America (PCS): 850 / 1900
The Telus DHD and Inspire 4G are the exact same device internally, the only difference is the "AT&T" in chrome on the metal housing rather than "HTC" on it for the Inspire 4G.
Every other DHD will not support north american bands, thats why you're limited to EDGE, since its the highest GSM gets (which supports the north american frequencies since that radio controller is quadband)
Not only that, but apn settings need to be entered for any data to work correctly (even if the frequencies are supported)
The general HTC Webpage shows the European/Asian frequency support of the phone, unless you choose a north american portal (US/Can)

JSLEnterprises said:
HSPA Frequencies in Europe (PCS): 900 / 2100
HSPA Frequencies in North America (PCS): 850 / 1900
The Telus DHD and Inspire 4G are the exact same device internally, the only difference is the "AT&T" in chrome on the metal housing rather than "HTC" on it for the Inspire 4G.
Every other DHD will not support north american bands, thats why you're limited to EDGE, since its the highest GSM gets (which supports the north american frequencies since that radio controller is quadband)
Not only that, but apn settings need to be entered for any data to work correctly (even if the frequencies are supported)
The general HTC Webpage shows the European/Asian frequency support of the phone, unless you choose a north american portal (US/Can)
Click to expand...
Click to collapse
Thanks for the response.
..Just realised I forgot to finish the post! (I'm blaming Jetlag).
..Anyway I got back to the UK on Thursday and have been unable to get 3G/MMS since I returned. I've walked all around the city today and at no point have I got anything other than Edge or GPRS coverage.
I've checked all the APN settings etc and all is fine.

[Q] India verson on T-mobile?

I've been using the One-V I bought on the internet, It's from India I believe. The phone works great good speeds. Now I have changed to T-mobile but I only get Edge connectivity. I see on the specs that the Asia version of this phone doesn't cover the 1700 band. Can I just flash the US version of the radio to the phone, or is it that the hardware doesn't run 1700?
I've tried flashing a T-mobile radio but no difference, so I'm wondering if it's hardware?
Cheers