I'm in australia and on Telstra (850Mhz and 2100Mhz).
The main network is 850Mhz but its congested as, and ironically the 'secondary' 2100 network seems to perform better in a lot of areas. However its only really good where the 850 has a problem, and vice versa. Hence I don't want to lock it to that network.
Is there a code I can enter (those *# codes) to do this? as opposed to manually selecting the 2100 network in settings. Or is that the same as long as I've enabled national roaming?!?
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I just bought a T-Mobile Dash 3G and unlocked it. I'm trying for it to log onto a 850MHZ network but I can't find a way to force that band. It keeps logging unto the 1800MHS band.
The only options for Network Type are: GSM or WCDMA
And the only options for Band type are Euro band, US band, or Japan band.
Is there a way to enable more options like GSM(1900+850)+UMTS(1900+850)??
Can somebody please explain GSM vs WCDMA vs UMTS for the bands?
My impression is GSM is 2G and UMTS is 3G and both can supply regular phone service? What's WCDMA then?
T-mobile USA is GSM 850/1900 and what else?
I was thinking if I specify what network and band to use it'll use less batter (ie. no 3g unless I really need it).
this is a really easy google search... or just go to wikipedia....really any search you would try will answer your question.
(you're half right, but mostly wrong)...here's some links for you
http://lmgtfy.com/?q=wcdma+wiki&l=1
http://lmgtfy.com/?q=gsm+wiki
Well I did google already, but still is over my head when I look at the band settings in the TMO HD2.
If WCDMA = UMTS why is there a separate GSM/WCDMA network selection, both allowing bands in GSM and UMTS.
Sounds like GSM is older tech, meaning 2g, whereas 3g is the newer GSM, which is UMTS, which = WCDMA. Therefore, how can you choose UMTS band frequencies on a old GSM network?
Perhaps I'm not phrasing my question correctly. I'm asking these because of the phone settings. I'm trying to figure out if it's more efficient to just tell the phone to look for specific network/band for TMOUSA thereby saving time and battery.
is this just too simple of a question or not many people understand. anyone?
ok, instead of giving you a bunch of info, let me give you just what I think you need.
I'm guessing you're going to Settings>Wireless Controls> Phone>Band and that's where the confusion is coming from. This screen is wrong and the Bands listed there are wrong (they're from previous devices, and htc didn't bother to update that screen).
So, you have 3 main choices there that should be of interest to you as long as you're in the US on Tmobile's network: Auto, WCDMA, GSM (under Network Type).
Auto: switches automatically between GPRS/EDGE/3G (HSDPA, HSPDA+)
WCDMA: 3G (HSDPA, HSPDA+)
GSM: EDGE/GPRS
The only way that playing with the band frequencies could help you would be if you're just interested in Edge/GPRS since tmobile uses two different frequencies there (native 1900 and 850 roaming). For 3g however, Tmobile uses only (and concurrently....as in you need to use both to get 3g and not just one or the other) 1700/2100 frequency.
Long story short, if you're trying to keep the phone from switching between 3g and Edge and you're in an area that has constant 3g, set it to WCDMA. (but note that if you loose 3g but are in an area with Edge, it will not switch to Edge, it will just be 0 bars/reception).
thanks alot, that really clears it up. I don't have data connection besides mms so I figure I may set it to no 3g and save some battery.
I bought an European Optimus 7 and it shows on the box "WCDMA 900/1900/2100, GSM850/900/1800/1900"
There's any way to put this phone to work on 3G WCDMA 850 networks at full speed?
Thanks
I own a Telus version of Optimus 7. My phone has the 900 3G band on it. I will tell you how to check whether your modem supports 850 or not. First, you open up the dialer and enter ##634#. This will install the MFG app, that will be accessible through your app list. The password that it asks is 277634#*#. Now you have access to the manufacturer test/setting menu. Proceed to the Engineer Menu, and then Modem Setting, followed by Band setting. There, you should see all the bands that are available, and WCMDA basically means UTMS or 3G. If you have the 850 band, it should be available in this menu. There are two other things you need to do before gaining access to this band, if available. But in order for me to continue, I need to know which carrier you plan to use this phone on. I am going to assume you want to use this in North America and you have already unlocked it. Let me know, and I shall help you further on making your phone functional for a 3G connection. BTW, I am typing this on my Optimus 7...the keyboard is seriously great, and if it wasn't for the loose buttons, I would have absolutely no regret over my purchase.
Thanks.
I saw here, there are these options available:
1.Automatic
2.WCDMA Only
3.GSM Only
4.WCDMA 850
5.WCDMA 1900
6.WCDMA 2100
7.GSM 850
8.GSM 900
9.GSM 1800
10.GSM 1900
11.WCDMA 900
Sorry for picking up this old thread again but there is no final answer on this.
The point is that I'm having the same problem, I have a european E900 and I can see the WCDMA 850 in the MFG settings. So is this working?
I'm going to Thailand next week and wanted to use True Move 3G which is on 850 Mhz.
Ok, just for the record - I am in Thailand now and the 850Mhz 3G Network from True Move is not working on the European E900.
Hope this helps for those who were looking for this answer.
I have the Vibrant and where I work, t-mobile has really crappy service, yet AT&T has awesome coverage. If I try to do a manual network selection and pick AT&T, it will just give an error "your sim does not allow connection to this network", is there a way to override this with a hack or a program? Or even just disable the 1900 band, since I think t-mobile uses 1900 and at&t uses 850, so in theory if it didn't detect any t-mobile, it should probably pick up AT&T.
Bummer.
I'm in Europe, and from simple direct testing (GT-I9505 vs SGH-I337), both in the same place (away from a big city and inside a moving train), running the same carrier, I found that the GT-I9505 had absolutely no problem running HSDPA+ speeds, whereas my SGH-I337 got up to EDGE... if I was lucky.
Inside a city there's no problem seeing that lovely H+ logo on my status bar, but anywhere else I went - nothing above EDGE.
Digging further, I learned that most of Europe (including my carrier) uses the UMTS at 900 mHz frequency for H+ data speeds, and digging more, I found that the aforementioned SGH-I337 doesn't include that particular frequency at all.
The international S4 has that frequency, even T-Mobile's version has that frequency, but not the particularly nastily locked SGH-I337 (let's not mention that damned locked bootloader).
Does my phone even have the hardware capabilities to turn on that particular UMTS frequency, and if yes, how do I unlock it?
http://forum.xda-developers.com/showthread.php?t=2291589 - this method unlocks AWS (I enabled AWS, haven't tested it yet).
Edit (even before posting):
http://forum.xda-developers.com/showpost.php?p=41739237&postcount=5 - following this post, I dialed *#2263# and that menu opened. In the WCDMA section there's WCDMA 900 - will it work for my specific situation?
I guess the mods will delete this thread, but have to ask, anyway.