well through testing almost all of the roms here in this section i have found out that every rom does have 3g but if you select HSDPA/HSUPA you will lose your 3G connection and can only have it again if you disable HSDPA/HSUPA. This seems very odd because the hermes and kaiser would switch between the two depending on which one had the stronger connection. i welcome others to test this as i think it is interesting and should be looked into.
HackMimic said:
well through testing almost all of the roms here in this section i have found out that every rom does have 3g but if you select HSDPA/HSUPA you will lose your 3G connection and can only have it again if you disable HSDPA/HSUPA. This seems very odd because the hermes and kaiser would switch between the two depending on which one had the stronger connection. i welcome others to test this as i think it is interesting and should be looked into.
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Hmmm Curious..
I am currently running RomeOS 1.21 and am about to update to 1.51.
mine switches no problem between the two.
If i can't get a HSDPA signal then it auto switches to 3G..
will see if the new rom changes anything.
Dean
let me know because i have been observing and have only seen it auto change from H to E or G whichs sucks when it use to go from H to 3G. travel the entire bay area for my job and both phones side by side with me act different. so wierd.
HackMimic said:
let me know because i have been observing and have only seen it auto change from H to E or G whichs sucks when it use to go from H to 3G. travel the entire bay area for my job and both phones side by side with me act different. so wierd.
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I Thought H was the same as 3g. Isn't Att's 3G network run on HSDPA?
HackMimic said:
well through testing almost all of the roms here in this section i have found out that every rom does have 3g but if you select HSDPA/HSUPA you will lose your 3G connection and can only have it again if you disable HSDPA/HSUPA. This seems very odd because the hermes and kaiser would switch between the two depending on which one had the stronger connection. i welcome others to test this as i think it is interesting and should be looked into.
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Click to collapse
HSDPA/HSUPS is 3G. If you are referring to WCDMA vs HSPA there would not be a stronger connection for either because they are on the same frequency.
Fact is on the Hermes/Kaiser the HSPA was downstream only (HSDPA) , on the raph its has bi-directional HSPA (HSDPA and HSUPA) therefor the towers you are broadcasting to with the device will have HSPA mode on continuously as apposed to only when you are receiving from them since the device is receiving and transmitting using HSPA.....which is why the HSDPA mode "H" symbol only appeared during data transfer on the older devices, there was normally a short delay (when using the device as a modem for example) before the "H" appeared and the data began coming in.
Notice how you need to reboot if you choose to deactive HSPA alltogether? The radio stack probably needs to start a new session on the network to change from HSPA back to UMTS only. Indeed when you set standard 3G mode you should get the "3G" symbol rather than "H".
The service rep at ATT told me the other day that HSDPA is actually different then 3G. THe HSDPA is typically meant for the Laptop Connect cards. Since the inception of the iPhone on 3G if you haven't noticed your speeds have dropped significantly.
How true is this I don't know...but when I am using a ROM like RRE that has HSDPA my speeds are much faster then with 3G.
ryncppr said:
The service rep at ATT told me the other day that HSDPA is actually different then 3G. THe HSDPA is typically meant for the Laptop Connect cards. Since the inception of the iPhone on 3G if you haven't noticed your speeds have dropped significantly.
How true is this I don't know...but when I am using a ROM like RRE that has HSDPA my speeds are much faster then with 3G.
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HSPA (3.5G) is just another coding method, it still uses the 3G frequencies as with UMTS (aka normal 3G). The theoretical bandwidth due to the more complex an efficient coding method means you can get ALOT more bandwidth down the same frequency than with UMTS. So technically UMTS and HSPA can both be encompassed into the "3G" terminology although they use different coding techniques, the video calling and voice stuff are handled identically afaik, data transmission is where they differ.
This kind of improvement can be seen in the 2G technologies with GSM/GPRS/EDGE.
HSDPA is a "higher speed" data connection than 3G... but its still a "3G" frequency data connection. So on-the-face-of-it, they are one and same, just one is faster than the other.
thank you so much. i am a very visual and analytical person. love to compare behavour. glad i got a real answer about this as i have been reading for days on this and it seems kind of cloudy with the fuze on information. thank you again for the replys.
Wow, there's quite a bit of information, some conflicting, about the various 3G-related terminologies here. So I might as well add my take on it all
Let's compare 2G terminologies to 3G ones, as that should make it easier for some to understand.
GSM - the very basic 2G standard
UMTS - the very basic 3G standard
GPRS - upgraded GSM to packet switching - faster data access - dubbed 2.5G
HSDPA - upgraded UMTS to faster downlink speeds - dubbed 3.5G
EDGE - upgraded GPRS to faster data access - dubbed 2.75G
HSUPA - upgraded UMTS to faster uplink speeds - dubbed 3.75G (occasionally)
Finally, HSPA is simply a term encompassing HSDPA and HSUPA.
I hope this helps more than it hurts
Trancecoder said:
GSM - the very basic 2G standard
UMTS - the very basic 3G standard
GPRS - upgraded GSM to packet switching - faster data access - dubbed 2.5G
HSDPA - upgraded UMTS to faster downlink speeds - dubbed 3.5G
EDGE - upgraded GPRS to faster data access - dubbed 2.75G
HSUPA - upgraded UMTS to faster uplink speeds - dubbed 3.75G (occasionally)
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There i fixed it for you
shotta35 said:
There i fixed it for you
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WCDMA is the air interface for UMTS as
TDMA is the air interface for GSM.
At the same time, GSM is used to describe a phone system that uses GSM/TDMA and UMTS/WCDMA versus the CDMA phone system used by Sprint/Verizon/Qualcomm.
Confused yet?
NuShrike said:
WCDMA is the air interface for UMTS as
TDMA is the air interface for GSM.
At the same time, GSM is used to describe a phone system that uses GSM/TDMA and UMTS/WCDMA versus the CDMA phone system used by Sprint/Verizon/Qualcomm.
Confused yet?
Click to expand...
Click to collapse
PLEAAAASEEE can we go into how OFDM and QPSK work?? i want to see some heads explode...scanners style.
NuShrike said:
WCDMA is the air interface for UMTS as
TDMA is the air interface for GSM.
At the same time, GSM is used to describe a phone system that uses GSM/TDMA and UMTS/WCDMA versus the CDMA phone system used by Sprint/Verizon/Qualcomm.
Confused yet?
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LOL, newbs reading this will and should be confused. I only edited it to make his comparisons between GSM and UMTS which is should be, not GSM and WCDMA which aren't in the same "group"
shotta35 said:
LOL, newbs reading this will and should be confused. I only edited it to make his comparisons between GSM and UMTS which is should be, not GSM and WCDMA which aren't in the same "group"
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*head explode*
what are decent speeds for HSPA connections?
shotta35 said:
There i fixed it for you
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Thanks. I really shouldn't post anything when it's late, especially when my head feels twice its size due to a particularly annoying cold
NuShrike and Mr. Vanx has explained it.
These jargons always confusing for us, laymans. Easiest term is i think CDMA (2000,1X, EVDO) is used almost exclusively in US, while GSM and WCDMA (UMTS) is in almost everywhere else of the world (around 3.5 billon users as of now - open www.gsmworld.com). Except Japan, they have their own customized system.
Reasons of difference? Matter of choice, more like when you decide using VHS instead of BetaMax. I think part of the reason why US choose CDMA instead of GSM you may ask Qualcomm's technical people, as they hold majority of the copyrights and licenses in CDMA technology. Not only in driverless chipsets... LoL.
Actually, we in Indonesia also adopt CDMA in smaller and narrower market. But the gov limit them to be Fixed Wireless. Now, what does the jargon: Fixed Wireless means?? Another head exploded... LoL =D
3G icon shows when the phone's sitting idle, H shows when data's being transferred.
My phone shows H all the time now because this market has moved on from UMTS + HSPDA to a HSPA market now. This is ONLY as a result of using the non-AT&T ROM, if you use that it will say 3G because AT&T has disabled it (the icon, not speeds) to cause less confusion.
As for what's typical HSPA speeds? Well on the AT&T network i've seen as high as 2Mbps (on a 3.6Mbps HSPA network) but there are places in Europe that are deploying 7.2Mbps and in Australia they are launching 21Mbps!!!
Does anyone know if Nokia Siemens downlink dual carrier software be used in a radio rom to make faster data available to those of us who only get 2G with our Fuze/ TP on T-mobile US?
If the answer is yes, that would be awesome. My Edge connection seems a bit slow for stuff like youtube in high quality.
I'm a recent owner of the motorola atrix but am very familiar with different mobile telecom technologies. I'm curious if anyone using the motorola atrix is actually connecting to the HSPA+ network or if AT&T has limited these devices to HSPA only. I believe you can check this by going to settings > about phone > status. Look for Mobile network type and it should say either GSM, EDGE, UMTS, HSPA or HSPA+
I'm currently in the Dallas market (one of the most rapidly developed AT&T markets) and am only connecting to the HSPA network. Hopefully this is not the case for everyone...
HSPA is what i connecting to on 2.3.4 build but i was on + on 2.2.2 I Think it
has to due with how ur APNS are set up.
Yea, I guess that could be the case. I'd like to hear from other members hopefully...
I am currently looking at purchasing a used Dell Streak, it is in Australia (so am I) but the seller says it was originally from the USA. Looking at a few different sites, the spec for American Streaks says UMTS 850. (Eg.: http://forum.xda-developers.com/wiki/index.php?title=Dell_Streak )
The network I would most like to use here is Australia is Telstra's NextG network; it is described here: http://whirlpool.net.au/wiki/3g_for_network_engineers
thus:
""3G" is a broad category of standards and services around "broadband" mobile wireless voice and data. Universal Mobile Telecommunications System (UMTS) is part of this family and is the standard used for 3G services in Australia. Telstra's NextG product is a UMTS implementation using a Wideband CDMA (W-CDMA) radio carrier in the 850 MHz band. There are "legacy" pockets of 2100 MHz used in some areas. Most modems are capable of automatically switching between the two bands, though not always of making the best choice. Some Telstra technical staff recommend sticking to the 850 MHz band."
I know that the Dell Streak version sold here by Optus (Telstra didn't sell them)
was NOT usable on the NextG network, but the info above from the links seems to imply that a Streak built for the USA would be?
Am I correct, or am I missing something?
Thanks, Bernie.
Yes, the US Dell Streak will work on Telstra's NextG.
Currently using it. Getting around 2770kbps down and 1339kbps up.
so um.... hardware should be the same, so a baseband / radio flash + custom mod should enable it?
you running a custom rom or a us standard?
cheers mate
blues
Thanks bluhound,
I'm also interested to know if you can update an Aussie or UK version like live_blues suggests. Any idea?
Thanks, Bernie.
You don't have to flash anything. The US firmware will work with NextG out of the box.
I don't think you will be able to flash an Aussie ROM as only Optus has the Streak and that model operates on the 900Mhz freq, not Telstra's 850Mhz.
I am currently running on StreakDroid 1.9.1 with DSP v360.
Dell Streak FAQ - xda wiki
See the last two lines, roms do not determine/affect your 3G freqs or lock status, it's determined solely by the configuration applied to the device when it was manufactured.
Roms do not care what submodel/lock status you have, you can install any rom and it wont change anything here.
There is also no concept of a AUS rom as the only roms loaded on devices sold there are unbranded/retail (unless they changed it some time during it's lifetime)
thx Manii, so its a manufacturing thingy... interesting... im sporting a UK Streak in Oz, guess I would just have to try
I currently have a Blackberry 9650 and 9000 and I use them both (long story) and I'm looking to buy an Android phone but I have certain requirements and while it doesn't appear I can find my dream phone, if certain features can be taken advantage of, then I can lean a certain way. I noticed that the Galaxy S 9000 (1st gen) had a weird setup where they disabled the 850mhz 3G band and that through the secret menu you can re-enable that 850mhz band because for some stupid reason it was disabled. Anyway looking at that menu I see that you can selectively enable and disable bands. So in my area on AT&T for what ever stupid reason, despite having better signal on the 850mhz band and even in the off peak hours (like 4am) just about any phone I'm using will hop around between 1900mhz and 850mhz 2G or 3G (depending on if I force 2G, 3G or LTE mode). The difference between 1900mhz and 850 is literally the difference between a call cutting in and out and having good signal, at least with a Galaxy S4.
I want to know if the original S is the only phone where certain bands (not just GSM, LTE, UMTS etc.) can be selected. My mom has a Galaxy S4 and I spent several hours playing around with the secret menus but I couldn't find a way to selectively enable/disable certain frequencies.
Is there a way on the S4, or even S3 or S2 to selectively enable/disable specific mhz not just choosing GSM, LTE, or UMTS? Or prehaps another android phone brand. Is there an app or do I have to get something like cyanogenmod to do these sorts of things on these phones?