Database Info

3G?

Is 3G software or hardware? In otherwords, Can a GSM PDA phone edition be converted to 3G? If 3G works with GPRS, why not?
Therefore will we soon see a 3G SD card similar to a Wi-Fi card?
Is there a XDA or i-Mate 3G on the cards any time soon?
Thanks
calli

3G or UTSM is a new network the name is because it's the 3th generation of wireless phone networks
the first ones were analog much like directed walktalky's really
2th one was gsm and CDMA
.....
so no it's not software
it operates on a different frequency band
and yes 3g phones are backward compatible so they also works
when there is no 3g service reach
this is the upcomming xda 4 device which support 3g
http://www.edbpriser.dk/Listprices.asp?ID=94253
what 3g really offer that 2g dont is
video phonening
and much much faster datatransfers

this is the upcomming xda 4 device which support 3g
http://www.edbpriser.dk/Listprices.asp?ID=94253
Click to expand...
Click to collapse
Hmmmm...that looks like a printer to me
I have a 3G data pcmcia card from Orange and I have also tried Vodaphones one.
I'm not impressed with the speed.
It keeps being touted as "broadband for your phone", but it's nowhere near there yet. I have yet to see it reach ISDN speeds.

T.Y.M.SAI said:
i am using 5G
Click to expand...
Click to collapse
...to reply to a 15-year-old post...

[Q] 3g weak in buildings!!!

Hi guys, my 3g (Tmobile) at home is excellent, but whenever I'm in school buildings, internet rarely works even though there are 3 or 4 bars does anyone know a solution for this??!!
Thank You

I have this same problem except my connection is bad at home and good everywhere else
Sent from my rooted nexus s

My whole connection sinks when I'm in school buildings, most of the time no connection at all (emergency calls only). I see people on 20$ boost mobile phones still being able to atleast text.
Sent from my Nexus S

The 3g issues arise from the frequency at which days data is transferred. Because it is high its building penetration it is less than other similar technologies
Sent from my Sublime MoDaCo Nexus S running Netarcy's amazing kernel!

kenvan19 said:
The 3g issues arise from the frequency at which days data is transferred. Because it is high its building penetration it is less than other similar technologies
Sent from my Sublime MoDaCo Nexus S running Netarcy's amazing kernel!
Click to expand...
Click to collapse
yup we need both 1700+2100 to make a proper 3G connection
while AT&T, Rogers, etc. they only need 850 or 1900, but they do not need both
i had to sacrify my 850 for the AWS, due the amazing price package

said before, tmobile's 3g network uses high frequencies which have bad building penetration, 1700/2100mHz. the lower the frequency the better the penetration of structures, like 850mhz is much better at going into buildings, reaching far distances, and better propogation properties.
nothing can be done about it, its a law of physics limitation. the only solution is to double the amount of towers/distance between towers in half.

GSM LTE phones vs CDMA LTE Phones radios

I found an interesting article about radios and LTE connections. The Radio Performance Disparity of the Galaxy Nexus on GSM and CDMA - Mobile Central - Binary Outcast
I have the oppurtunity to either go with ATT or Verizon. The article makes it seems that GSM is a better bet for LTE phones especially in areas with poor reception. I am hoping people can provide insight/comments on LTE phones for GSM and CDMA carriers and the article.
The Radio Performance Disparity of the Galaxy Nexus on GSM and CDMA
The Samsung Galaxy Nexus. It's Google's flagship phone that is designed to complement the Android 4.0 “Ice Cream Sandwich” operating system software. With high end specifications (for 2011) and highly optimized software, the Galaxy Nexus is supposed to show off what Android can really do without any interference from carriers and OEMs. However, that wound up not truly being the case in the United States with the CDMA/LTE variant for Verizon Wireless and Sprint.
By and large, the CDMA/LTE variant sold by Verizon Wireless and Sprint is the same as the original HSPA+ model that is now sold by Google on the Play Store (at least in terms of hardware). It has the same CPU, RAM, NFC chip, screen, cameras, etc. The only hardware difference is the cellular radio structure.
The original UMTS HSPA+ model uses an Intel XG626 baseband modem that is connected to an antenna structure that supports quad-band GSM and penta-band WCDMA for global usage. For Americans, it means that it works on the HSPA+ networks for both AT&T and T-Mobile USA.
The CDMA/LTE variant uses a VIA Telecom CBP7.1 CDMA2000 baseband modem, connected to an antenna structure that supports dual-band CDMA2000. The Sprint model adds another CDMA2000 band that is exclusive to Sprint. Both CDMA/LTE variants use a Samsung CMC221 LTE baseband modem, but the Verizon Wireless variant is set up for LTE band class 13 (Upper 700MHz C block), while the Sprint variant is set up for LTE band class 25 (U.S. Extended PCS, also known as PCS+G). The Verizon Galaxy Nexus has a user-accessible SIM card slot while the Sprint one does not.
While the Intel (formerly Infineon) baseband used to be troublesome on AT&T's network (as many iPhone users that didn't own an iPhone 4S can attest to), the latest generation of basebands work fine on both AT&T and T-Mobile. With 3GPP Release 7 support, it has a maximum downlink throughput of 21Mbps while it has a maximum uplink throughput of 5.76Mbps. In general, the Galaxy Nexus works very well on AT&T and T-Mobile.
However, it isn't the same for the CDMA variants of the Galaxy Nexus. The VIA Telecom CDMA chip is notorious for weak performance. Other notable devices that use the chip are the Samsung DROID Charge and the Samsung Stratosphere. Searching on the web about these devices turns up a lot of complaints about CDMA service quality with these devices.
Jason Perlow of ZDNet experienced more than his fair share of issues while trying to live off of the 4G LTE connection his Galaxy Nexus provided. But he was trying to live off of 4G LTE, not CDMA2000. So why was he affected? Well, the truth is, CDMA/LTE devices require both radios to be active and connected. Not to mention, network authentication and feature provisioning actually goes through the CDMA system, not the LTE one.
The bridge between CDMA2000 and LTE is rather brittle and is prone to failure, because LTE wasn't designed to be bridged with CDMA2000 like that. It was intended to be installed alongside GSM and WCDMA networks, and it handles it a lot better with those networks. So when something goes wrong in the rather terribly buggy CDMA system, the whole phone can and usually does fail. If Verizon Wireless had upgraded the CDMA2000 system to UMTS HSPA+ like most other CDMA2000 carriers across the globe, it would have avoided dealing with this problem.
Also, the CDMA/LTE Galaxy Nexus lies to you (at least, it does now). Originally, the “bars” that indicate signal strength would actually indicate the signal strength of LTE if it was connected to an LTE network. When everyone started complaining about how weak the signal was compared to the Motorola DROID RAZR and Motorola DROID Bionic, Anandtech investigated. It turned out that the signal strength was actually accurate, and that LTE signals are incredibly weak. Previous devices used the CDMA signal strength to determine how many “bars” of signal you have. The Galaxy Nexus did not. It used the LTE signal strength when it was connected to LTE, and the CDMA signal strength when it wasn't. Verizon Wireless issued an update shortly afterward that changed the behavior to match older LTE devices. Newer LTE devices do the same as well.
Combining the fact that the Galaxy Nexus has to work incredibly hard to maintain an LTE signal with the fact that the CDMA2000 radio is horrible and has a difficult time holding onto the connection will lead anyone to the conclusion that it is a recipe for disaster. Is it any wonder why Jason Perlow and many others have so many problems with the CDMA/LTE version of the Galaxy Nexus? Not really.
Of course, this is excluding all the issues with timely updates that Verizon Wireless has caused for Galaxy Nexus owners. Including this issue just makes the problem worse. There are ways to work around some of the issues, though some workarounds will result in permanent degradation of performance. However, it doesn't mean anything if it takes forever for anyone to get any updates that implement them.
In the end, I really can't solidly recommend the CDMA/LTE version of the Galaxy Nexus to anyone. Nor can I recommend any CDMA2000 device that uses a VIA Telecom CDMA baseband modem. The pitfalls just make it a bad experience for everyone.[

Will the snapdragon S4 chip from Qualcomm help with this issue?

Techno Buffalo has an article about T-Mobiles transition to LTE and a T Mobile person stated that their enhanced backload will help T Mobile's LTE. will this help AT&T's LTE Too? http://www.technobuffalo.com/news/w...backhaul-is-the-key-to-a-users-4g-experience/

Here is another article talking about the challenge CDMA has with LTE when the LTE signal is weak
http://www.phonearena.com/news/How-...-you-dont-need-it-and-save-on-battery_id32990

small error?
Hey didn't have time to read what you wrote but gsm is 2g and wcmda is 3g and 4g and LTE is also 4g so what you wrote did not make much sense GSM WCMDA and LTE are 3 different types of radios and here is a tip lo let people help you faster dont add more to what you wrote edit it instead because now it looks like 3 people already helped you
thanks if it helped :good:

For me this is highly theoretical. I recently moved from Dayton, Ohio to Kingsland, Georgia with a Verizon Galaxy Nexus (CDMA). In both places, if I allowed the LTE radio, the phone would get too hot to handle comfortably, and 3G isn't that great either. But in my neighborhood, there is no AT&T or T-Mobile data signal at all. That severely limits practical choices.

One more http://www.extremetech.com/mobile/110711-what-is-lte/7

[Q] Clean Rom Question [Network]

Hi Guys,
So I've been running Clean Rom for roughly 6 months now, still running version 5.1 (Android Version 4.0.4) on my HTC ONE XL.
My One XL is a Telstra branded phone and thus has the capability for 850MHz. I was running on the Vodafone network and therefore not using said band, however I have recently swapped over to Telstra (Was never with them in the first place).
Unfortunately I'm not seeing the gains in reception I was hoping for, and I am currently finding that when going to locations where there should be signal, albeit edge, crappy signal, I am receiving none. My question is, does Clean Rom disable the 850MHz frequency or does it still support it? Is there a way I can check whether I am accessing the 850MHz network, and if so, how? If it isn't am I able to turn on th 850MHz frequency?
Looking forward to getting this sorted. Cheers.

ROM shouldn't make much difference in band compatibility. Since your version supports 850 MHz for both 2G (EDGE) and 3G, it should work regardless of ROM, and you don't need to "turn it on". There are "secret codes" you can enter into the dialer that will tell you information about the bands, and also signal strength. Just use the XDA search function, and you should be able to find them.
You might see some slight improvement if you are not currently on a Jellybean radio, and flash one (if hboot 2.14 or higher, you will need to s-off). But I wouldn't bet on it making a huge difference.
What makes you think you should have (crappy) reception in the mentioned locations? From reception on another phone? Every phone is different (antenna design, etc.). Since you mentioned the reception at the location is already crappy, its probably more of a antenna issue than a ROM issue.

redpoint73 said:
ROM shouldn't make much difference in band compatibility. Since your version supports 850 MHz for both 2G (EDGE) and 3G, it should work regardless of ROM, and you don't need to "turn it on". There are "secret codes" you can enter into the dialer that will tell you information about the bands, and also signal strength. Just use the XDA search function, and you should be able to find them.
You might see some slight improvement if you are not currently on a Jellybean radio, and flash one (if hboot 2.14 or higher, you will need to s-off). But I wouldn't bet on it making a huge difference.
What makes you think you should have (crappy) reception in the mentioned locations? From reception on another phone? Every phone is different (antenna design, etc.). Since you mentioned the reception at the location is already crappy, its probably more of a antenna issue than a ROM issue.
Click to expand...
Click to collapse
I'm not sure where you're located, Telstra is the largest Telco in Australia with the largest and best coverage. Vodafone unfortunately has a very bad reputation for reception. Swapping from Vodafone which does not use an 850MHz band to Telstra, which does, has netted me reverse effects. I am receiving worse reception, which should not be the case. If I go into fringe areas where edge is the best signal you receive, I will receive none, where as in town locations where more than the 850 band is used, I receive okay signal. Just seems like I'm not picking up the 850 band.

As I already mentioned, search for the "secret" dialer codes. There are codes that will tell you the cell tower signal, and I believe band, which sounds like what you need.

None of the dialer codes seem to allow me to see what particular frequency I'm using. Unless I'm just completely missing something? The only thing that seems to provide me with info on the radio only states Network Type and the DBM.

[Q] Poor signal strength compared to other devices?

Hi,
I just bought my One S (had a Desire before that) and Im very happy with it, except for the signal and especially the mobile internet. I always had 3+ signal bars in my house, now I have 1 or sometimes none. I use my phone at school to google some stuff but while other devices (Blackberry Bold, S4 mini) can acess the internet I have no connection. Sometimes I have 2 bars and E(DGE) but my browser or Whatsapp wont work.
My friends have always 3G/H and inside the school I never have more than E, but I set my phone to GSM/WCDMA auto.
Sometimes the phone loses the connections even on flat areas like fields.
Is there a way to improve my signal strength? A new Radio ROM?
P.S: My One S has the S4, everything original and no root, S-ON

What software version are you on? And what carrier?
Mine has way better signal than my sisters S3 and it's about equal to my girlfriends Iphone4s, but we're on Telus/Bell network which has HSPA only, no 2g network, so I set it to WCDMA only. I haven't had any problems with reception dropping or data drops at all, but I've heard of some issues with the same phone on the Rogers network which has 2g as well like some of the US carriers.

Software Version: 3.16.401.9
HTC SDK API: 4.63
Baseband: 1.15.50.05.29_10.30.50.08L
Thats all I found under Software...
Im from Germany and I dont know if youre familiar with the carriers here, but I use congstar therefore the D1-network of the german Telekom which is pretty good here. Look like Im on the newest RadioROM, so how to improve my connection?

Looks like I'm on an older radio starts with 1.11 instead of 1.15. Does your network have regular gsm?
Sent from my HTC One S using xda app-developers app

I can use EDGE when setting my phone to GSM only, but I have not more than 2 bars even outdoors...on WCDMA only I have none or 1 bar outdoor, in buildings: no connection. So yes, I have GSM and WCDMA.

Well I don't know, you could try rooting and flashing a different radio, and some build.prop tweaks that affect the connection, but there is no guarantee that will fix it. Is it still under warranty? Rooting may be risky if you're still under warranty. Could try talking to your carrier and see if they can do anything.