Develop Bugs

Which icon's better

I'm running CM7 RC1v2 and I didn't have any connection for a little until I just switched basebands but it's switched automatically from 3G to an H, is that good or bad?
Swyped from my MB525 using XDA App

H stand for HDSPA or High-Speed Downlink Packet Access or 3,5G.
It's faster than 3G and if avaiable in your region and carrier it's good. Don't worry
regards

I'm with tmobile is this like 4g?
Swyped from my MB525 using XDA

not really, 4G is a different protocol and network, even faster than those described in my prior post. Just like 3g and HDSPA are different from EDGE or 2G.
4G isn't even supported by our device. As I'm a stranger to T-mobile I can't confirm which networks they make available to you, but if you have an H icon in your defy and it's surfing the web normally, you obviously have HDSPA coverage where you are.

[Q] Anyone else experience weird behavior with data connection, 3G to H and back?

Is this an Android feature or is there something wrong with my 3G?
What happens is that whenever I am using my browser and searching on Google and my data connection shows 3G, when I click something it switches to H. Then, after page load, it changes back to 3G.
It makes me wonder if something is wrong with my 3G, or it is some battery-optimizing done by the phone.
Am I missing something? I did not notice this with my HTC Desire, it stayed on 3G or H until connectivity became worse or better.

perfectly normal,as 3G just being the band you can be called on,but once you start browsing and download stuf,your conection turns into HSPDA(thus the H) this is the data conection integrated in 3G(its faster than actual 3G)
you can see it as a download mode.
H is just a download indicator if you ask me.
thus maybe your HTC was downloading constand or had a lower refresh rate?
the described action you present is pretty common on my nexus S

Yes this is normal behaviour in stock Android.

Great to hear, thanks
Yeah it was constant on my HTC Desire, either on H or 3G. Apps were the same, so I don't think Desire did some background work that Nexus isn't doing.
I like it, thanks!

Every phone I've had from the Nexus One would do this - usually stock roms don't show an "H," only 3G, so you can't tell that it's switching between.

My HTC desire would switch between 3g and h on Orange but if I roamed on to t mobile it would permanently show as H. I guess it can also depend on the network.
Sent from my Galaxy Nexus using Tapatalk

You don't want it to stay on H .. it uses heaps more battery. There's also limited capacity on the network to support H connections. If everyone connected in H they would run out. It's meant to be temporary while you need to download a webpage, etc.

Mine is doing this too
Sent from my Galaxy Nexus using Tapatalk

I think there's been a thread on this already, but just to reiterate:
This is just a feature of UMTS and HSPA. Using HSPA takes more battery than UMTS or EDGE, so you only want it on when you are actively downloading or uploading data. Otherwise, UMTS serves just fine for background data and syncing.
When you're reading a web page (your example), there's not a lot of data being transfered, and you're sitting on UMTS. As soon as you click a link, it switches to HSPA, pulls down the info, and switches back again.
To my knowledge, stock android shows the difference between 3G and H pretty accurately. Carrier and/or manufacturer customized ROMs often tend to lead towards leaving "H"/"H+"/"4G" in the status bar more than 3G. If you watch your "about phone" > "status" screen, you'll see your phone switches between UMTS and HSPA quite often, even if the interface is preferring to show you "H". I think its mostly a marketing tactic that also reduces customer confusion.
So bottom line, you should be happy it switches to save your battery!

I have this and trust me, it cains battery.

I have never seen H in my Nexus S.
So this is good
Sent from my Nexus S using XDA App

gogol said:
I have never seen H in my Nexus S.
So this is good
Sent from my Nexus S using XDA App
Click to expand...
Click to collapse
That's because the Nexus S is a 3G phone that doesn't have the hardware required to transmit HSPA+ signal.

matt2053 said:
That's because the Nexus S is a 3G phone that doesn't have the hardware required to transmit HSPA+ signal.
Click to expand...
Click to collapse
The Nexus S is HSPA capable. just not HSPA+.

Actually HSPA doesn't use _more_ battery when you're camping. It only uses more battery while transferring, but even thats debatable. Eg 10mb downloaded in 1 minute over HSPA vs 5 minutes on 3G - which uses more battery to complete the task?
What does use extra battery is IF it has to switch to another tower to get you HSPA. However the network is pretty smart at choosing the most efficient thing to do, although it is biased to move people to towers which allow the most number of subscribers to be on the network. For example, if you are in a built up area and there are 3 towers within range, one perhaps right next to you, you may be switched to one further away so that one can service a user on the edge of its signal area. Although this uses more of your battery, it allows both of you to use the network rather than just 1.

Booo. So I just upgraded from a mt4g (the old one) to a GN, and now when I stream Sirius, it cuts out as it switches between H & 3G. I used Wifi today because it was driving me crazy. I wish there was a switch to turn off 4G, not 3G also.

Is it possible Turn off 4G and use 3G?

I think the biggest battery drain for the phone is the 4G radio. Is it possible turns it off and use 3G?

you can't. you either have data on or data off. What drains the battery more is having your phone switch between edge/3g/H/H+ automatically.

Our phones are not like an lte phone. Our 4g is really just souped up 3g so you either get edge our 4g.
Sent from my SGH-T989 using xda premium

jessejames111981 said:
you can't. you either have data on or data off. What drains the battery more is having your phone switch between edge/3g/H/H+ automatically.
Click to expand...
Click to collapse
When your phone is switching from 3G to H (which you don't see anymore, all you see now is E or 4G) your not switching technologies. Back when you saw 3G vs H it just ment your phone was idle and not transferring data. When H came on, you were doing data.
There is also no difference in switching from HSPA to HSPA+. It is the same data, just one is a little faster.
Now, before T-Mobile launched HSPA, yes, there was Rev99 data which was slow like Edge and your phone only displayed 3G. But that has been gone for a long time.
As far as switching from GSM to UMTS (Edge data to HSPA data) yes, that will cause battery drain if it is continuous. This is because the phone is trying to reestablish a data connection.
In summary, you no longer see 3G on your phone, only 4G which replaces the 3G/H icons. When you are connected to 3G you are NOT switching technologies when you use HSPA data, your just activating data thus you are NOT draining more than normal amounts of battery. When you switch from 2G to 3G you ARE switching technologies so if your continuously bouncing from 2G to 3G that can cause increase in battery drain.
---------- Post added at 07:04 PM ---------- Previous post was at 07:02 PM ----------
thecalip said:
I think the biggest battery drain for the phone is the 4G radio. Is it possible turns it off and use 3G?
Click to expand...
Click to collapse
No, everyone is VERY confused with this. They are the same radio. HSPA+ is the data side of 3G. T-Mobile is just calling it 4G because Sprint got away with hit with their WiMax. EVER cell site on T-Mobile's network has HSPA activated. This means there is no longer 3G data.
---------- Post added at 07:11 PM ---------- Previous post was at 07:04 PM ----------
xsteven77x said:
Our phones are not like an lte phone. Our 4g is really just souped up 3g so you either get edge our 4g.
Sent from my SGH-T989 using xda premium
Click to expand...
Click to collapse
Again, people do not know true definitions.
HSPA - 3.5G
WiMax - 3.5G
LTE - 3.5G
Ture 4G technologies are:
WiMax 2 and LTE Advanced.
NO CARRIER IN THIS NATION HAS EITHER OF THOSE TECHNOLOGIES ACTIVATED!!!
Sprint turned on WiMax (not 2nd generation) and called it 4G. So why not follow suit do the same thing. It's all marketing.

thecalip said:
I think the biggest battery drain for the phone is the 4G radio. Is it possible turns it off and use 3G?
Click to expand...
Click to collapse
well, the drain is likely due to dual cell usage. You can disable dual cell which will knock your top speed down to 21 (theoretical) Mbps. So get to service mode select Debug Screen - > Phone Control -> NAS Control -> RRC(HSPA) Control -> Change RRC Revision ->
DL speeds for items listed are as follows:
R99 = 384kbps
Rel 5 = 7.2
Rel 6 = 14.4
Rel 7 = 21
Rel 8 = 42
hope this helps

Couldn't you force your phone on the 850 UMTS frequency? I say this because I thought HSPA /+ran on the 1700 and 2100 bands so theoretically you could actually be on 3G. I know jugs rom allows you to switch the data icons displayed to 3G for UMTS and H/4G for HSPA /+

iLeopard said:
Couldn't you force your phone on the 850 UMTS frequency? I say this because I thought HSPA /+ran on the 1700 and 2100 bands so theoretically you could actually be on 3G. I know jugs rom allows you to switch the data icons displayed to 3G for UMTS and H/4G for HSPA /+
Click to expand...
Click to collapse
T-Mobile doesn't use/have 850 range.
Let me see if I can explain this a little better. T-mobile launched their 3G network on a UMTS platform utilizing WCDMA technology. It's like Verizon and Sprints CDMA but with the W which stands for Wideband. CDMA stands for Code Devision Multiple Access. Wideband is what allows T-Mobile to have such high data rates. Standard CDMA has a 2.5MHz bandwidth while WCDMA has a 5MHz bandwidth for each carrier they are utilizing. Currently, most (not all) major cities have dual carrier launched so those sites are actually using 10MHz of bandwidth. This allows for 42Mbps speeds. 21 for each carrier. We are actually starting to deploy 3rd carrier which will allow 1 carrier just for voice so the full 42Mbps is use solely for data. 84 is a COMPLETELY different story and I will not bother with that for now.
Moving on. When T-Mobile built their network they built it with HSPA in mind. You see, HSPA and HSPA+ are add on data technologies that work on a WCDMA network. They are NOT a separate signal to your phone. Following? Hope so! So, with that said, when your device is connected to a 3G cell site, the data available is HSPA+ and the voice is over what you are calling 3G. They are, in fact, the same signal.
HSPA/HSPA+ data is on the same signal as your 3G voice. You are NOT receiving 2 signals. You CANNOT separate them.
Now, on to frequencies. There are 2 modes that you can run WCDMA in, full duplex and half duplex. T-Mobile decided to go with full duplex. I'm assuming (low man on the totem pole here so don't know for sure) this was to have greater data rates. This is why T-Mobile uses 2 frequencies. 1 in 1700 band for transmit, 1 in 2100 band for receive. This is also where T-Mobile differentiates from ATT (and exceeds! ) because ATT went with half duplex and only uses 1 frequency. So, T-Mobile phones have the ability to transmit and receive at the same time while ATT phones do not.
With all of that said, and hopefully understood, you should now know that it DOES NOT MATTER WHAT THE FRIG ICON YOUR PHONE SHOWS!!!!. Sorry, been trying to get that point across. The firggin icon doesn't not mean ****. The fact that you can have a 3G icon and a separate H does not mean ****. If you do have separate 3G and H icons like older T-Mobile phones and you can see it switching that is because while your phone is idle (NO DATA) it will display 3G. While your phone is doing data (ON THE SAME CONNECTION) it will display H. It is a simple indicator to let you know you are using HSPA data.
T-Mobile did away with both icons and replaced them with the 4G icon when they went to the 4G ad campaign. Get it, got it, good!
---------- Post added at 09:49 AM ---------- Previous post was at 09:40 AM ----------
AUTX_buckeye said:
well, the drain is likely due to dual cell usage. You can disable dual cell which will knock your top speed down to 21 (theoretical) Mbps. So get to service mode select Debug Screen - > Phone Control -> NAS Control -> RRC(HSPA) Control -> Change RRC Revision ->
DL speeds for items listed are as follows:
R99 = 384kbps
Rel 5 = 7.2
Rel 6 = 14.4
Rel 7 = 21
Rel 8 = 42
hope this helps
Click to expand...
Click to collapse
I don't think your actually disabling the 2nd carrier. I think your just limiting the max data rate your phone will do. As I previously stated, the phone will connect to what the cell site has. You will always be connected to a 10MHz bandwidth if the site is a dual carrier site.

setzer715 said:
T-Mobile doesn't use/have 850 range.
Let me see if I can explain this a little better. T-mobile launched their 3G network on a UMTS platform utilizing WCDMA technology. It's like Verizon and Sprints CDMA but with the W which stands for Wideband. CDMA stands for Code Devision Multiple Access. Wideband is what allows T-Mobile to have such high data rates. Standard CDMA has a 2.5MHz bandwidth while WCDMA has a 5MHz bandwidth for each carrier they are utilizing. Currently, most (not all) major cities have dual carrier launched so those sites are actually using 10MHz of bandwidth. This allows for 42Mbps speeds. 21 for each carrier. We are actually starting to deploy 3rd carrier which will allow 1 carrier just for voice so the full 42Mbps is use solely for data. 84 is a COMPLETELY different story and I will not bother with that for now.
Moving on. When T-Mobile built their network they built it with HSPA in mind. You see, HSPA and HSPA+ are add on data technologies that work on a WCDMA network. They are NOT a separate signal to your phone. Following? Hope so! So, with that said, when your device is connected to a 3G cell site, the data available is HSPA+ and the voice is over what you are calling 3G. They are, in fact, the same signal.
HSPA/HSPA+ data is on the same signal as your 3G voice. You are NOT receiving 2 signals. You CANNOT separate them.
Now, on to frequencies. There are 2 modes that you can run WCDMA in, full duplex and half duplex. T-Mobile decided to go with full duplex. I'm assuming (low man on the totem pole here so don't know for sure) this was to have greater data rates. This is why T-Mobile uses 2 frequencies. 1 in 1700 band for transmit, 1 in 2100 band for receive. This is also where T-Mobile differentiates from ATT (and exceeds! ) because ATT went with half duplex and only uses 1 frequency. So, T-Mobile phones have the ability to transmit and receive at the same time while ATT phones do not.
With all of that said, and hopefully understood, you should now know that it DOES NOT MATTER WHAT THE FRIG ICON YOUR PHONE SHOWS!!!!. Sorry, been trying to get that point across. The firggin icon doesn't not mean ****. The fact that you can have a 3G icon and a separate H does not mean ****. If you do have separate 3G and H icons like older T-Mobile phones and you can see it switching that is because while your phone is idle (NO DATA) it will display 3G. While your phone is doing data (ON THE SAME CONNECTION) it will display H. It is a simple indicator to let you know you are using HSPA data.
T-Mobile did away with both icons and replaced them with the 4G icon when they went to the 4G ad campaign. Get it, got it, good!
---------- Post added at 09:49 AM ---------- Previous post was at 09:40 AM ----------
I don't think your actually disabling the 2nd carrier. I think your just limiting the max data rate your phone will do. As I previously stated, the phone will connect to what the cell site has. You will always be connected to a 10MHz bandwidth if the site is a dual carrier site.
Click to expand...
Click to collapse
Couple things.
1.
You will always be connected to a 10MHz bandwidth if the site is a dual carrier site.
Click to expand...
Click to collapse
- this statement is false. Your phone is only connected to one carrier at a time in idle mode which means only 5 Mhz
2.
Standard CDMA has a 2.5MHz bandwidth
Click to expand...
Click to collapse
- wrong again CDMA is only 1.25 MHz
3.
ATT went with half duplex
Click to expand...
Click to collapse
- wrong again please lookup FDD (Frequency division duplex) vs TDD (Time division duplex).
if you work for T-Mo and I really hope your not in the engineering department, because most of your technical information you present is incorrect

thecalip said:
I think the biggest battery drain for the phone is the 4G radio. Is it possible turns it off and use 3G?
Click to expand...
Click to collapse
the 4G and 3G radio uses the same circuit
so if you disable 4G you will also need to disable 3G
so technically yes you can disable 3G and work 2G on to receive push data

AUTX_buckeye said:
Couple things.
1. - this statement is false. Your phone is only connected to one carrier at a time in idle mode which means only 5 Mhz
Click to expand...
Click to collapse
Yes, in idle, but we're talking about limiting data here, not idle states. So therefore, if you are connected to a dual carrier site and in a data session you will be utilizing both carriers regardless of your data rate.
2. - wrong again CDMA is only 1.25 MHz
Click to expand...
Click to collapse
Yep, my mistake, typo.
3. - wrong again please lookup FDD (Frequency division duplex) vs TDD (Time division duplex).
Click to expand...
Click to collapse
Was trying to give a simplistic explanation. I guess next time I will just link wikipedia.
The whole point of the discussion was that you cannot turn off the HSPA on your phone and use just 3G. I have not messed with the settings you are suggesting and I don't know that I would as inexperienced users can mess their phones up in those menus. I suppose you could force your phone to R99 mode and that might work but forcing to 21Mbps only I still think you will be using both carriers when using data. Will do testing and report back.

setzer715 said:
Yes, in idle, but we're talking about limiting data here, not idle states. So therefore, if you are connected to a dual carrier site and in a data session you will be utilizing both carriers regardless of your data rate.
Yep, my mistake, typo.
Was trying to give a simplistic explanation. I guess next time I will just link wikipedia.
The whole point of the discussion was that you cannot turn off the HSPA on your phone and use just 3G. I have not messed with the settings you are suggesting and I don't know that I would as inexperienced users can mess their phones up in those menus. I suppose you could force your phone to R99 mode and that might work but forcing to 21Mbps only I still think you will be using both carriers when using data. Will do testing and report back.
Click to expand...
Click to collapse
NP. shouldn't have fired back that hard. Technically you only get DC if their is enough capacity on the site so its not a given. You & Allgamer are correct there is no "4G" radio its all one radio on the chip, however changing that setting actually should affect the software which i'll give a brief primer on.
R99 = 1 code with a spreading factor of 16 (surprisingly probably the least power efficient of the group)
HSDPA (7.2) = 10 codes with spreading factor of 16 (in our case likely the most efficient power wise)
HSPA (14.4) = 15 codes with spreading factor of 16
HSPA+ (21) = 15 codes with spreading factor of 16 & 64QAM
HSPA+ (42) = HSPA+(21) * 2.
so with the phone not having to decode 64QAM + using less codes the CPU shouldn't have to ramp up as much to process the data.

AUTX_buckeye said:
so with the phone not having to decode 64QAM + using less codes the CPU shouldn't have to ramp up as much to process the data.
Click to expand...
Click to collapse
I totally agree with this. I'm still not convinced, though, that switching form single to dual carrier is doing much as far as battery drainage. It's not like switching modes between GSM and UMTS or LTE and CDMA (Verizon/ATT world) and trying to reestablish on the network. I mean I guess it could cause a little but something is my brain is just saying that the switching isn't doing that much. Now doubling the bandwidth and data rate, yeah, that is definitely increasing battery usage but the switching itself I just don't know.
Honestly I get mixed battery life depending on my daily usage so testing would be hard. That is unless it's huge differences. I set my phone to Revision 8 and see it its huge improvements.
On a side note, and could just be that phone, but 2 of my friends have Thunderbolts and they get like 2-4 hours of battery life. Something WILL have to be done to fix battery life on LTE.

Well, as somebody said i tried the service mode and got too excited and ****up alot of stuff, wiped and installed jug again but looks like the settings got saved . Anyway to reset all the settings there?

Husam2011 said:
Well, as somebody said i tried the service mode and got too excited and ****up alot of stuff, wiped and installed jug again but looks like the settings got saved . Anyway to reset all the settings there?
Click to expand...
Click to collapse
Exactly what settings did you touch and what is currently NOT working.
No, no master reset that I know of.

setzer715 said:
Exactly what settings did you touch and what is currently NOT working.
No, no master reset that I know of.
Click to expand...
Click to collapse
Basically i touched alot of stuff. Wow i ****ed up!!!! no signal and nothing is showing, no dbm or carrier but when i go to settings/networks it shows up att and tmobile in carriers
It also says RRC: IDLE, BAND 5 in basic info
I messed up with Fake Security something, Antenna/adc, network control
Edit: Putting the sim that came with the phone in, it connected and showed dbm but then after 1min it just had an x on the network bars.

Husam2011 said:
Basically i touched alot of stuff. Wow i ****ed up!!!! no signal and nothing is showing, no dbm or carrier but when i go to settings/networks it shows up att and tmobile in carriers
It also says RRC: IDLE, BAND 5 in basic info
I messed up with Fake Security something, Antenna/adc, network control
Edit: Putting the sim that came with the phone in, it connected and showed dbm but then after 1min it just had an x on the network bars.
Click to expand...
Click to collapse
I feel like mine said band 4 earlier today but I cant be for sure. I don't have 3G at my house so I can't test till tomorrow.
You could always try reflashing the phone with odin and stock to see if that fixes those defaults but I'm not sure where they are written. Definitely not in the ROM. Maybe the bootloader or radio image have this information stored so flashing stock oden .tar may fix it? Sorry, I really don't know and this is EXACTLY why I said people shouldn't be messing with these settings.

setzer715 said:
I feel like mine said band 4 earlier today but I cant be for sure. I don't have 3G at my house so I can't test till tomorrow.
You could always try reflashing the phone with odin and stock to see if that fixes those defaults but I'm not sure where they are written. Definitely not in the ROM. Maybe the bootloader or radio image have this information stored so flashing stock oden .tar may fix it? Sorry, I really don't know and this is EXACTLY why I said people shouldn't be messing with these settings.
Click to expand...
Click to collapse
Flashing to stock seems to fix it, not flashing modem. Thank god it worked! thanks

setzer715 said:
I feel like mine said band 4 earlier today but I cant be for sure. I don't have 3G at my house so I can't test till tomorrow.
You could always try reflashing the phone with odin and stock to see if that fixes those defaults but I'm not sure where they are written. Definitely not in the ROM. Maybe the bootloader or radio image have this information stored so flashing stock oden .tar may fix it? Sorry, I really don't know and this is EXACTLY why I said people shouldn't be messing with these settings.
Click to expand...
Click to collapse
well... i guess in this case too much info is a bad thing. My suggestion was to TOUCH ONLY the RRC settings ... anything else is a crapshoot
yes T-MOs 3G/4G is "UMTS Band IV"
and for future note... if you don't know what your doing and your screwing around in service mode... take SCREENSHOTS before you mess with anything. Or have a buddy with a phone that is untouched.

AUTX_buckeye said:
well... i guess in this case too much info is a bad thing. My suggestion was to TOUCH ONLY the RRC settings ... anything else is a crapshoot
yes T-MOs 3G/4G is "UMTS Band IV"
and for future note... if you don't know what your doing and your screwing around in service mode... take SCREENSHOTS before you mess with anything. Or have a buddy with a phone that is untouched.
Click to expand...
Click to collapse
Reverting the setting back doesn't/didn't do anything for me. I had to flash stock odin rom+recovery

I know someone said previously that the "4G" icons don't mean much as it will usually show "E" or "4G". However, my phone showed "3G" the other day while I was at home and I only saw this once. Someone on another board said that means it was picking up 1900mhz WCDMA as supposedly T-Mobile is starting to use HSPA on 1900mhz in certain areas. Is that correct?

Is this LTE?

Is this LTE? It still shows 3G in the notification bar but the sidnal doesn't show 1xRtt or EvRev-a insttead its showing and eHRPD ,it is pretty fast compared to what I've been getting her. Also they were where performing upgrades to my towers last week according to customer service.

Yes, it's LTE.
Are you sure you live in an LTE market?
Be mindful the signal strength on this phone is God awful.
However, it is lightning fast once you're on a 4G network.
Sent from my LG Optimus Prime G

Not according to the lists but have noticed new style towers and for the last two weeks have had horrid service and now the data is much faster. I will still bounce off a slow tower now and again where I live but this is phenomenal. I live a short distance from a major interstate so I suspect that's why it got updated not on the "cities list".
But why does the notification bar still show 3G?

It still shows 3G because that's what you're using. When you see the LTE logo that's when it'll be active. Sprint is also updating 3G service as well which is supposed to bring faster speeds as well. I suspect that's what you're noticing.
Sent from my LG-E970 using Tapatalk 2

Customer Service
I spoke to customer service last night and brought up the question of the lack of LTE. His answer was that by the end of February or sooner Sprint is dramatically expanding their courage for LTE as well as their two other signals, a total of three signal expands (3G,4G, and LTE) btw LTE is 4 times faster than 4G from what the rep. told me. So lets cross our fingers and hope that by the end of December we get Jelly Bean and by February we get LTE !

Your rep is high on something.
4G IS LTE.
It's just a type of 4G, similar to how WiMax was 4G, and HSPA+ could be considered 4G, but it's really 3.5G.
LTE is just what the interface is called.
I think by the three bands, he's talking about EvDo, CDMA, and LTE
Sent from my LG Optimus Prime G

This is what I found from another site...good reading and yes my "3G" speeds have significantly improved since the updated structure.
http://s4gru.com/index.php?/topic/1819-what-is-ehrpd/
"In all seriousness, here is a comprehensive understanding of eHRPD:
For the most part, eHRPD is EVDO-A. Both are 3G CDMA technology. EVDO is a High Rate Packet Data technology, and eHRPD is Evolved High Rate Packet Data. It is essentially the same exact technology, except eHRPD data is routed through the LTE core instead of the MSC (switch) so it can maintain the same IP address as LTE. This allows for data hand offs between LTE and 3G. Only LTE devices are capable of eHRPD connections.
eHRPD and EVDO-A are broadcast from the same tower on the same channel using the same technology and the same backhaul. It is one signal, not two different signals. However, if your device is in CDMA only mode (or you have a non-LTE device), your data from your device goes from the site through backhaul to a Sprint MSC switching center is processed and dumped out onto the internet backbone.
If your device is in CDMA/LTE mode and your site has been upgraded to eHRPD, when your device data gets to the site, it goes through the backhaul to a 4G LTE core instead of the MSC. There it is processed and dumped out onto the internet backbone.
So, the only difference in performance between eHRPD and EVDO-A on the same site occurs at the MSC vs. the LTE core. Everything else is pretty much identical between the two. Each site in the Sprint network is tied to a very specific MSC for 1x voice and EVDO data. Sprint has dozens of MSC's scattered around the country. When that MSC experiences problems or has a logjam, it affects all the sites connected to it. And EVDO can slow down (although this is not the big culprit in Sprint 3G deterioration).
In contrast to how the MSC's handle 1x and 3G EVDO data, 3G eHRPD and 4G LTE data are processed through 4G cores. Unlike MSC, sites are not limited to only one core. Sprint is setting up their 4G LTE cores to be dynamic. So if one core is too busy, data can be routed to a different under burdened core.
Performance between EVDO-A and eHRPD should be very similar when on the same channel from the same exact site. The most common difference is that eHRPD will often have faster ping times. And a MSC is more likely to bottleneck than an LTE core, so at peak times EVDO may be slightly slower than eHRPD (when all things are the same)."

When you start using the LTE service in your area the icon will change to this......the picture shows my LS970 in Charlotte NC where LTE is just starting up.
Sent from my LG-LS970 using xda app-developers app

swizz-knife77 said:
When you start using the LTE service in your area the icon will change to this......the picture shows my LS970 in Charlotte NC where LTE is just starting up.
Sent from my LG-LS970 using xda app-developers app
Click to expand...
Click to collapse
Thankyou. By the way did you know there is a section in display settings that you can optimize proportions of indivdual apps so they take up the entire screen? Works great too.

eHRPD is 3G. Its the stop gap between EVDO and LTE. So that the hand off is easier and faster.
Sent from my Galaxy Nexus using xda app-developers app

I did not know that, I will fiddle with the settings immediately lol
Sent from my LG-LS970 using xda app-developers app

TheAceX said:
I spoke to customer service last night and brought up the question of the lack of LTE. His answer was that by the end of February or sooner Sprint is dramatically expanding their courage for LTE as well as their two other signals, a total of three signal expands (3G,4G, and LTE) btw LTE is 4 times faster than 4G from what the rep. told me. So lets cross our fingers and hope that by the end of December we get Jelly Bean and by February we get LTE !
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Omgosh please read and educate yourself and dont EVER listen to.a sprint rep.come here where the pros are(not me lol) LTE is 4g and the rep is an idiot. They may have meant wimax but.should have said that. Now some say hspa isnt 4g (tmobile) its like 3g on steroids but hey if your getting 15megs then it might.as well b. But sorint is cdma so im.straying off. Anyway please read up and learn so when you post those sprint jerks wont make you look well.....like ya dont know. Good luck and message me anytime. If i dont know the answer i can ask.my friends.
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---------- Post added at 05:35 AM ---------- Previous post was at 05:33 AM ----------
times_infinity said:
eHRPD is 3G. Its the stop gap between EVDO and LTE. So that the hand off is easier and faster.
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Now.times_infinity knows his stuff its helpful peeps like you that make us smile. Thank.you
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Flaky data? Read here (non LTE users)

I recently revisited the ##3282# menu to try to cure my constantly unstable data connection. I went under OTHERS and then under HDR/1X Selection and chose EHRPD 1x Mode.
THIS WILL DISABLE LTE
This has made a world of difference in my phone and I hope others can benefit from it. Please chime in if you experience any adverse effects. Calls/text seem to be working better than ever for me along with a rock solid 1mbps data connection.
Edit: looks like I have no ehrpd at my house so I am trying hybrid mode. Seems solid so far.
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Taken from below by s4gru
http://s4gru.com/index.php?/topic/1819-what-is-ehrpd/
For the most part, eHRPD is EVDO-A. Both are 3G CDMA technology. EVDO is a High Rate Packet Data technology, and eHRPD is Evolved High Rate Packet Data. It is essentially the same exact technology, except eHRPD data is routed through the LTE core instead of the MSC (switch) so it can maintain the same IP address as LTE. This allows for data hand offs between LTE and 3G. Only LTE devices are capable of eHRPD connections.
eHRPD and EVDO-A are broadcast from the same tower on the same channel using the same technology and the same backhaul. It is one signal, not two different signals. However, if your device is in CDMA only mode (or you have a non-LTE device), your data from your device goes from the site through backhaul to a Sprint MSC switching center is processed and dumped out onto the internet backbone.
If your device is in CDMA/LTE mode and your site has been upgraded to eHRPD, when your device data gets to the site, it goes through the backhaul to a 4G LTE core instead of the MSC. There it is processed and dumped out onto the internet backbone.
So, the only difference in performance between eHRPD and EVDO-A on the same site occurs at the MSC vs. the LTE core. Everything else is pretty much identical between the two. Each site in the Sprint network is tied to a very specific MSC for 1x voice and EVDO data. Sprint has dozens of MSC's scattered around the country. When that MSC experiences problems or has a logjam, it affects all the sites connected to it. And EVDO can slow down (although this is not the big culprit in Sprint 3G deterioration).
In contrast to how the MSC's handle 1x and 3G EVDO data, 3G eHRPD and 4G LTE data are processed through 4G cores. Unlike MSC, sites are not limited to only one core. Sprint is setting up their 4G LTE cores to be dynamic. So if one core is too busy, data can be routed to a different under burdened core.
Performance between EVDO-A and eHRPD should be very similar when on the same channel from the same exact site. The most common difference is that eHRPD will often have faster ping times. And a MSC is more likely to bottleneck than an LTE core, so at peak times EVDO may be slightly slower than eHRPD (when all things are the same).
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So do you lose access to LTE then? Mine is currently set to CDMA-LTE-EVDO. If one chooses the 1x eHRPD mode, wouldn't you then not connect to LTE where available?
**EDIT**
To answer my own question, i just discovered that doing this disables LTE. Go into ##3282# and View, Advanced and on the bottom, LTE status is "Disabled".
Going back to CDMA-LTE-EVDO. I like my LTE (even the little i get here and there in NYC).

I am unable to test but from what I have read only lte capable phones can even use ehrpd so I don't see why it would not work.
Edit: doesn't work
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Simple because like the LTE ONLY selection ehrpd is ehrpd only mode which is 3g only. But if you get LTE at home try the LTE only selection youll love it.
One more thing your name os eerily similar to my real name

Cool name bro. Lol. Alright did a little editing to reflect lack of lte but otherwise this is really a useful option for me at work. My phone was constantly flipping from 3g to 1x making it unusable but now I get perfect 3g all the time.
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You should mention in the OP that you need your MSL to see the HDR/1X selection menu.

Does this do anything different than going into "network mode" under settings and changing it from "LTE / CDMA" to "CDMA"? If they're the same thing this seems easier.

honki24 said:
Does this do anything different than going into "network mode" under settings and changing it from "LTE / CDMA" to "CDMA"? If they're the same thing this seems easier.
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Seems to be the same thing really, I think..

honki24 said:
Does this do anything different than going into "network mode" under settings and changing it from "LTE / CDMA" to "CDMA"? If they're the same thing this seems easier.
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LordLugard said:
Seems to be the same thing really, I think..
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Its not the same.
Under settings mobile type you will see
CDMA = 1xRTT:6
Speed test 123kbps down 172kbps up
eHRPD = eHRPD:13
Speed test 381kbps down 310kbps up
YMMV
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If you read my initial reply to OP, doing what he suggests just turns off LTE... You might as well go into Settings and set it to CDMA/EVDO only which also turns off LTE. Same thing..

This thread is not about those with LTE its for people with limited and unreliable 3g. Simply just going under mobile networks and choosing cdma did not work it would cycle nonstop from 3g to 1x and was unbearable. Choosing ehrpd disables 1x alltogether creating a stable 3g connection.
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