As I understand, Verizon operates on 850 MHz for voice & text, 1900 MHz for 3G and 700 MHz for 4G, is this correct? I read this somewhere, but the main reason I came to this conclusion is that when I get a text or send data on 4G, my desktop speakers "buzz" due to RF noise, but when I send 3G data, there is no noise, and I know 1900 MHz doesn't cause any RF noise similar to WiFi. Anyway, just wanted to confirm.
I thought voice was 800 Mhz. Also, 3G coverage is a mix of 800/1900 depending on your area I believe. 800 for normal 3G and 1900 for broadband (at least I think...).
Vorfidus said:
I thought voice was 800 Mhz. Also, 3G coverage is a mix of 800/1900 depending on your area I believe. 800 for normal 3G and 1900 for broadband (at least I think...).
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3G is broadband, I'm not sure what you refer to as regular 3G. Usually anything 2G or below is narrow band, and usually voice is over 1xRtt or GSM, not CDMA or WCDMA, because CDMA was built for data and not as a realtime network for voice.
CDMA is Verizon's 3G. I'm not questioning whether voice is on 800 or 850 (which is a minor detail), either could be correct, if you read 800, then it is probably 800, I just wanted to know for sure that voice and text are always on the lower frequency (800 or 850), which has a better range than 1900, and that CDMA / 3G is on the higher frequency (1900), which goes through obstacles and walls easier, and not vice versa. I've never heard my 3G data ever make RF noise, that's why I'm assuming it's on the 1900 MHz band.
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I got my Infuse a few weeks ago and while I'm happy with the speeds over the Captivate (which never seemed higher than 2mbps) I don't think I am getting HSPDA speeds.
With 2-5 bars I am averaging around 1.5-3.5mbps in and around Boston which is all covered by AT&T's "4G" service (Im only talking HSPA+ here not LTE). My highest was 6.7mbps and 7.4 mbps once a week or so ago.
In looking at my "Mobile Network Type". I think that I am very infrequently if ever seeing it say HSPDA. It generally says UMTS.
Am I correct in saying the UMTS is the 3G service that basically the IPHONE gets?
Is anyone else out there seeing faster speed and their "Mobile Network Type" say HSPDA regularly?
UMTS is ATT's basic 3G service...and is generally a very slow network but has a big coverage base....
HSPA is the newer 3G service which gets even better speeds but it still limited in some areas.....An iPhone as you mentioned will connect to UMTS or HSPA depending on cell tower location......HSPA+ which is what the INFUSE connects to is nothing more then HSPA with better backhaul for higher speeds but has the same coverage and range of regular HSPA.
HOWEVER, the way it works is that it connects to the STRONGEST signal at the time, if UMTS is outputting a stronger signal from a cell tower you will latch onto that one more often then HSPA....
At work and traveling to and from, i am usually on HSPA, but at home that signal is weak (location of cell tower with HSPA amplified) so i am usually on UMTS...
actually hspa runs on top of umts and only switches when you start downloading. if you idle, it should say umts.
The Jack of Clubs said:
actually hspa runs on top of umts and only switches when you start downloading. if you idle, it should say umts.
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That's not always true, it depends on the cell site architecture the device is pinging - my device and many previous device idle on HSPA frequently and in other spots, UMTS.
Sent from my SAMSUNG-SGH-I997 using XDA App
A useful post to tweak your 4G settings: http://forum.xda-developers.com/showthread.php?t=1127980&highlight=HSPA+cat+control&page=2
anyone can do that???
3G is HSPA. Some carriers are just more specific about the connection, hence one might see an E instead of 2G or an H instead of 3G and H+ instead of 4G. Here in the US the only carrier that's specific about the connection used is sprint which displays an Ev (for EvDO) to indicate 3G (even tho their speeds are more like 1G).
I wonder HSDPA is an enhanced 3G which the speed is faster than 3G. Lumia diagnostics has built in setting to turn on or off the HSDPA that I wonder it can set the phone in default 3G or user defined HSDPA. Hence Lumia user can still select in radio setting lower to 2G connection in order to save more standby time.
angler said:
I wonder HSDPA is an enhanced 3G which the speed is faster than 3G. Lumia diagnostics has built in setting to turn on or off the HSDPA that I wonder it can set the phone in default 3G or user defined HSDPA. Hence Lumia user can still select in radio setting lower to 2G connection in order to save more standby time.
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this is exaclty what i ask for, at least save some battery life...
remember how the iphone 3G has great battery life?
because it does not use HSPDA, only 3G, and this is during web usage too..
If my carrier has a HSPA+ 42Mb network, and I have a smartphone with a HSPA+ 42Mb radio and my speed is around 25-30 Mb for example, that means that any other smartphone with a 21, 14.4 and 7.2 HSPA radio should be surfing at their top (theoretical) speed?
HSPA an HSPA+ have inherent problems. If you are getting anywhere near 8Mbps please post a screenshot. More likely that you get between 2-6 Mbps with 170-300 latency or ping and your indoor coverage is worse. This is due to 2 reasons. One, HSPA+ is only 3G with a bit more bandwidth and two, the frequency is 1800mhz or greater which means even a simple window can worsen signal strength.
HSPA+ is not an independent technology, but is a licensed technology making it limited by regulations. Many carriers are using it until their LTE matures. LTE operates at up to 10X the speed, allows double the cells using data, half the cost to the carrier, and a latency around 100 for more responsive sessions. The major players in LTE right now is Seimens out of Germany and Lucent ehre in the states. Their test dummy is Verizon who has 64% of the wold wide LTE market and this is being passed onto Vodofone, an others. In the states ATT has now contracted Seimens and a lesser known company who supplies the core equipment to develop their network. Right now ATT stands at 7% of the world market in LTE.
boosterp said:
HSPA an HSPA+ have inherent problems. If you are getting anywhere near 8Mbps please post a screenshot. More likely that you get between 2-6 Mbps with 170-300 latency or ping and your indoor coverage is worse. This is due to 2 reasons. One, HSPA+ is only 3G with a bit more bandwidth and two, the frequency is 1800mhz or greater which means even a simple window can worsen signal strength.
HSPA+ is not an independent technology, but is a licensed technology making it limited by regulations. Many carriers are using it until their LTE matures. LTE operates at up to 10X the speed, allows double the cells using data, half the cost to the carrier, and a latency around 100 for more responsive sessions. The major players in LTE right now is Seimens out of Germany and Lucent ehre in the states. Their test dummy is Verizon who has 64% of the wold wide LTE market and this is being passed onto Vodofone, an others. In the states ATT has now contracted Seimens and a lesser known company who supplies the core equipment to develop their network. Right now ATT stands at 7% of the world market in LTE.
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Very good words, very informative, I really apreciate it. But I was looking for some light about what I asked.
As You can see in my signature I got 6.67Mbps with a ping of 121, and my phone was on 3G not even on H(HSDPA), and this video shows high speed with the Huawe E372(not in my country, I just found it on youtube).
http://www.youtube.com/watch?v=1PUawx4Au_8&feature=related
here in Dominican republic Orange dominicana had a 14.4Mbps HSDPA network, and now they claim they have a 42Mbps HSPA+ network working in Santo domingo and Santiago and coming soon in other areas.
So, my question is, if I get speeds over 21Mbps, let say between 25-30Mbps, that would mean I will get the top speed in devices with a 21, 14.4 and 7.2 Mbps radios? or I could get 25Mbps with devices with a 42Mbps HSPA+ radio (Huawei E372, for example), and get less than 14.4Mbps in devices with a 14.4Mbps radio, etc?
note: I tried to use the youtube feature but didn't work.
A little tougher to answer based on the specific set up in your country. I only gave a background as example or foo for thought regarding HSPA+. I would venture to guess that you could potentially hit that 25Mbps mark depending on traffic, network conditions, interference, and base equipment. If you are within 2 km of a tower and not in a null sector of the broadcast with no interference it would be possible but mostly at burst speed an not sustained. Let me know what develops, PM me with your speeds when you can test it.
Hello,
Does anybody know if there is a big difference in power consumption of 3G or 4G? Every chipset is different, and I'm unable to find the power usage of both modems.
I am using a provider that uses 900 MHz, 1800 MHz and 2100 MHz for LTE and 900+2100 MHz for 3G.
I am getting full bars almost everywhere. On 3G and 4G.
I've locked the 4G frequency on 900 MHz-only, so my phone doesn't switch between frequenties and that I always have the best reception.
Kind regards,
Pilovali
LTE uses less power on the SD410 SOC in most cases... there is no need to lock the frequency either, the phone and tower will agree on the best signal, although the one you are using now may seem like the best, it is may not be in all conditions, buildings, interference areas, etc.
Alright, that's what I wanted to know. I'll keep my Moto G on LTE then
I always thought that 3G uses less power than LTE.
Pilovali said:
Alright, that's what I wanted to know. I'll keep my Moto G on LTE then
I always thought that 3G uses less power than LTE.
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It used to be that way... Go back to HTC Rezound or Samsung Galaxy S2 LTE days and yes, LTE radios would suck a battery dry in no time, but modern SOCs are far more efficient.
Alright, thanks for the feedback!
How can you close a thread, btw?
It works but too low signal...
Every other band is working 2100 1800
So what's the problem?