[Q] force to 3G only? - Verizon Samsung Galaxy S III

The 4G service at work between 8:30am to 5:30pm is literally unusable. I have 3 bars but as soon as everyone shows up, the data literally slows to a trickle. This wasn't always the case and I'd like to test the modem in 3G mode. My theory is that the 4G uplink is saturated but possibly not the 3G pipe. I don't believe the software provides this functionality to the user normally but since my device is rooted, is there a way to temporarily tell the modem to switch to 3G? I'm proficient in linux/unix and comfortable in a shell environment so a solution along those lines is fine for now.
Running android 4.4.2 w/ baseband i535OYUDNE1 (most recent OTA update from verizon), towelroot and supersu.
-Kevin

https://play.google.com/store/apps/details?id=com.cc.signalinfo
Use the additional info button a the bottom of the main screen.

bobloblaw1 said:
Use the additional info button a the bottom of the main screen.
Click to expand...
Click to collapse
Thanks for the suggestion. I iterated through all of the options under "preferred network type" e.g. WDMA, CDMA, EVDO, GSM, etc. Changing the mode would remove the LTE symbol from the phone (and disable data) but I could never get the 3G symbol to show up. Is there another option I might be missing?

That's odd. I'm on 4.3TW and the CDMA (prl) option works.
Are you sure 3g data is present at your location.?

bobloblaw1 said:
That's odd. I'm on 4.3TW and the CDMA (prl) option works.
Are you sure 3g data is present at your location.?
Click to expand...
Click to collapse
I can remember having 3g at one time here but I'll wait to answer that until I get home where I frequently get dropped to 3g.
But, I noticed something interesting in looking at the power metrics. As I said I have 3 signal strength bars and the 4G LTE symbol. But this app says I have -61 db(71%) LTE RSSI signal and 2db(44%) LTE SNR. Doing some google searches I found a verizon document that says that RSSI should be greater than -58db and SNR should be greater than 12.5db for LTE to work correctly on their network. So that would seem to indicate why my data performance is bad and not necessarily a saturated uplink to the tower. So, is the signal strength meter actual reporting CDMA (voice) RSSI?

smalco44 said:
I can remember having 3g at one time here but I'll wait to answer that until I get home where I frequently get dropped to 3g.
But, I noticed something interesting in looking at the power metrics. As I said I have 3 signal strength bars and the 4G LTE symbol. But this app says I have -61 db(71%) LTE RSSI signal and 2db(44%) LTE SNR. Doing some google searches I found a verizon document that says that RSSI should be greater than -58db and SNR should be greater than 12.5db for LTE to work correctly on their network. So that would seem to indicate why my data performance is bad and not necessarily a saturated uplink to the tower. So, is the signal strength meter actual reporting CDMA (voice) RSSI?
Click to expand...
Click to collapse
I confirmed that the app won't push me to 3g at home either and I am frequently on 3g there.

smalco44 said:
I confirmed that the app won't push me to 3g at home either and I am frequently on 3g there.
Click to expand...
Click to collapse
hah, and now I'm at work and realized, my work phone is 3G (verizon) only and its got 5 bars. Any ideas what's going on?

Related

N5 chooses hspa+ over LTE ??

This is my first time with LTE phone and it seems like at times I have to go into mobile networks and select 3g then select LTE again for the LTE symbol to pop up? I'm on straight talk and just didn't know if this was normal or if the phone will select hspa signal if its better than the LTE signal ?
Sent from my Nexus 7 using xda app-developers app
i think by default it will when idle fall back to the strongest network cause it saves battery.
but when you need data it will attempt to switch to the fastest available.
cant say for sure but this is what appears to happen on all my phones falls back to 3g and when data is needed it shifts to HSPA+
newtonfb said:
This is my first time with LTE phone and it seems like at times I have to go into mobile networks and select 3g then select LTE again for the LTE symbol to pop up? I'm on straight talk and just didn't know if this was normal or if the phone will select hspa signal if its better than the LTE signal ?
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
I'm getting the same behavior on T-Mobile. My Nexus 4, which was never intended to have its LTE radio used, would stay on LTE, come hell or high water, while I'm in the city and fight to keep it as I left. The Nexus 5 seems picky about it's LTE and only uses it if it deems it good enough. If LTE gets 2 bars or lower, it goes back to HSPA. If you force "LTE only" under the secret dialer menu, it will use its LTE, but when you switch it back to LTE/GSM (PRL), it drops LTE and uses HSPA+. I'm like, "The hell is your problem, your highness?"
I had high hopes driving into work today. I was expecting it to get on LTE much sooner, but it didn't switch until I was deep within the city until I entered the parking structure (which my N4 would still have LTE). While I sit here at work, it refuses to switch to LTE while in the building where my N4, in the same spot, would be happily on LTE.
I just don't get it. I thought LTE would be much better on this device, instead it is worse. I feel like this is a bug of some sort. We are in an age where carriers will begin shutting down their legacy networks (of course, T-Mo is nowhere near as ready), and this phone treats LTE like Sprint WiMax!
Not sure about straight talk but I'm in lte with att if I'm in a lte area.
Sent from the jaws of my Hammerhead!
Just took mine right out the box and as it booted it went right into LTE.
On tmboile.
---------- Post added at 07:36 PM ---------- Previous post was at 07:31 PM ----------
Just took mine right out the box and as it booted it went right into LTE.
On tmboile.
AndroidKills said:
Just took mine right out the box and as it booted it went right into LTE.
On tmboile.
---------- Post added at 07:36 PM ---------- Previous post was at 07:31 PM ----------
Just took mine right out the box and as it booted it went right into LTE.
On tmboile.
Click to expand...
Click to collapse
I suppose I should re-flash my phone then. It's just silly how my phone keeps preferring HSPA+ over LTE. When I had LTE enabled on my Nexus 4, my battery life really didn't change. I suppose it had, but it wasn't perceptible to me.
I've had really good luck with it connecting to an LTE network when inside of a LTE area.
However this morning I was streaming from soundcloud while driving and I was 10 minutes into the city with LTE coverage and it would switch. As soon as I ran speedtest it switched. So I believe what was said up above to be true. It needs a good reason probably too switch if your current network mode is doing fine for your current data needs/battery.
I did read this phone is using Qualcomm s news LTE chip which saves power. That could probably play a role.
Either way I'm totally fine with it because it responded to my need of a lot of data instantly by switching to LTE when I ran speed test.
So hey if it saves me battery and h+ is enough for streaming from soundcloud I'm not going to argue with it.
Hold this helps.
Sent from my Nexus 5 using xda app-developers app
Couple of things to keep in mind.
One, your phone will say 3g when not using LTE or HSPA+. This is to save battery, it only shows LTE or H when you are downloading something, or loading a webpage.
Secondly, I have noticed my phone will choose a strong HSPA+ signal over a weak LTE signal. At home, I have a solid LTE connection, so it always says LTE, but at work it switches back and forth from 1 bar of LTE to full bars of HSPA+. Speed wise, they are still comparable, at around 5-6mb/s. At home though, my LTE is around 40mb/s.
Hope this helps.
ArkAngel06 said:
Couple of things to keep in mind.
One, your phone will say 3g when not using LTE or HSPA+. This is to save battery, it only shows LTE or H when you are downloading something, or loading a webpage.
Secondly, I have noticed my phone will choose a strong HSPA+ signal over a weak LTE signal. At home, I have a solid LTE connection, so it always says LTE, but at work it switches back and forth from 1 bar of LTE to full bars of HSPA+. Speed wise, they are still comparable, at around 5-6mb/s. At home though, my LTE is around 40mb/s.
Hope this helps.
Click to expand...
Click to collapse
So, my Nexus 4 keeping its LTE active all the time except for when making/receiving calls was a "bug" of the hacked radio then? I'm not being sarcastic, I just never owned a true LTE phone before, but my friend who has a Nexus 5 says his LTE has been staying on. It really doesn't make sense for LTE to behave this way as it will replace the legacy networks at some point in the future in which you won't have anything else to fall back to.
Oddly, I haven't noticed this at all. I'm on t-mobile, and my nexus 5 defaults to LTE when I have LTE selected as preferred connection. It doesn't switch to 3g during dormancy as far as I can tell (when I turn the screen back on, its already on LTE).
dijit4l said:
I'm getting the same behavior on T-Mobile. My Nexus 4, which was never intended to have its LTE radio used, would stay on LTE, come hell or high water, while I'm in the city and fight to keep it as I left. The Nexus 5 seems picky about it's LTE and only uses it if it deems it good enough. If LTE gets 2 bars or lower, it goes back to HSPA. If you force "LTE only" under the secret dialer menu, it will use its LTE, but when you switch it back to LTE/GSM (PRL), it drops LTE and uses HSPA+. I'm like, "The hell is your problem, your highness?"
I had high hopes driving into work today. I was expecting it to get on LTE much sooner, but it didn't switch until I was deep within the city until I entered the parking structure (which my N4 would still have LTE). While I sit here at work, it refuses to switch to LTE while in the building where my N4, in the same spot, would be happily on LTE.
I just don't get it. I thought LTE would be much better on this device, instead it is worse. I feel like this is a bug of some sort. We are in an age where carriers will begin shutting down their legacy networks (of course, T-Mo is nowhere near as ready), and this phone treats LTE like Sprint WiMax!
Click to expand...
Click to collapse
If you don't mind, would you share how to force LTE only under the secret dialer menu?
Thanks.
[EDIT]
I think I found it with the code *#*#4636*#*# -> phone information -> set preferred network type: LTE only
When I do this and reboot, my bars just disappear, and my APN in my mobile network settings disappears too. I'm using net10.
Anybody know a fix to this?
Megiddo2000 said:
If you don't mind, would you share how to force LTE only under the secret dialer menu?
Thanks.
[EDIT]
I think I found it with the code *#*#4636*#*# -> phone information -> set preferred network type: LTE only
When I do this and reboot, my bars just disappear, and my APN in my mobile network settings disappears too. I'm using net10.
Anybody know a fix to this?
Click to expand...
Click to collapse
I don't have to reboot, myself. When I force LTE only, the phone drops HSPA and goes to LTE.
I'd say put it back to GSM/LTE Only (PRL) and then reset your APN settings.
dijit4l said:
I don't have to reboot, myself. When I force LTE only, the phone drops HSPA and goes to LTE.
I'd say put it back to GSM/LTE Only (PRL) and then reset your APN settings.
Click to expand...
Click to collapse
when i try dialing that number it says "Connection problem or invalid MMI code."
What's wrong?
_untitled_ said:
when i try dialing that number it says "Connection problem or invalid MMI code."
What's wrong?
Click to expand...
Click to collapse
woops, my bad. the code is:
*#*#4636#*#*
(forgot to flip the hashtag asterik in the back)

[Q] HSPA Fallback

Hi everyone,
I was looking around and I read that the Nexus is suppose to fallback to HSPA when the LTE signal is weak or non-existent.
I was curious as to when the phone actually considers the LTE signal weak. In my room, I only get 1 bar on LTE (~115 dBm), sometimes losing the signal completely, however I have never actually seen it fallback to HSPA.
So my question is, when does the phone automatically switch from LTE to HSPA?
Thanks in advance!
Current setting on my phone:
LTE (Recommended) is selected as the "Preferred network type"
[LTE/GSM auto (PRL) in the hidden menu]
Yes it will automatically switch when you not in a LTE area.. Its not based on signal strength.. Its based on your area and the area without Lte must have hspa to work or it will switch to 3g or Edge if hspa is unavailable...
Sent from my Nexus 5 using XDA Premium HD app
As in previous reply, it only falls back if there is no signal. Sometimes signals are weak and connection drop. Your phone tries to connect back to LTE. Since LTE signals are still in the air, it wouldn't switch to HSPA. If you think you will benefit from HSPA compared to LTE, you can manually change it.
areazus said:
As in previous reply, it only falls back if there is no signal. Sometimes signals are weak and connection drop. Your phone tries to connect back to LTE. Since LTE signals are still in the air, it wouldn't switch to HSPA. If you think you will benefit from HSPA compared to LTE, you can manually change it.
Click to expand...
Click to collapse
Hey, thanks for the quick reply.
I guess now my question is, how long will the phone wait before it gives up on looking for a LTE signal and switch to HSPA?
I initially thought that the phone would fall back to HSPA if the LTE signal is too weak.
Thanks in advance!

LTE Only Searching For Service Battery?

Hi everyone. Quick question. I searched but didn't find much, but I was wanting to use LTE only (*#*#4636#*#*, Phone, LTE Only), and it does work but on Sprint, it disables 1x and pretends like the phone has no coverage and then does the "Searching for Service" and the battery drains like crazy. Any ideas?
MrObvious said:
Hi everyone. Quick question. I searched but didn't find much, but I was wanting to use LTE only (*#*#4636#*#*, Phone, LTE Only), and it does work but on Sprint, it disables 1x and pretends like the phone has no coverage and then does the "Searching for Service" and the battery drains like crazy. Any ideas?
Click to expand...
Click to collapse
That mode disables all voice and texting abilities, I don't think you can use that on a phone, especially not a phone on Sprint.
turn it back, if the phone doesn't think it has a good enough signal to use LTE, trust it and drop to 3G you'll be better off.
Use global setting for Sprint
Sent from my Nexus 5
I don't want 3g though because my phone has the power to get a signal but if it gets down to 1 bar roughly (driving between towers and I'm in a fairly big city so it's not a coverage/reception issue) and it drops to 3g, despite the fact that it'll get stronger if it waits 5 more seconds.
you can not get/make phonecalls on lte only, period. its for data only.
indeed. setting it through the dialer to lte only, makes that lte data channel the only channel, it kills the ehrpd / 1x cdma 200 ip hand-off needed for voice paging to & from the network..
but NOW i know WHY you were forcing lte only via the dialer (didn't know at 1st)
but where you are (if you're on srpint) this is what' was reported happening -
Sprint used to have "same-as-native" 3G service in the western half of Kansas via those carriers, and even used to show it as Native on their coverage maps. Then it changed to Off-Network roaming a couple years ago. They even stopped Native service along I-70 through most of Kansas and eastern Colorado. Sounds like some of those carriers aren't being too accommodating to Sprint nowadays.
via the HoFo App
i didn't know, the hometown of sprint, was having such a hard time covering, it's own home state..
j'vai said:
indeed. setting it through the dialer to lte only, makes that lte data channel the only channel, it kills the ehrpd / 1x cdma 200 ip hand-off needed for voice paging to & from the network..
but NOW i know WHY you were forcing lte only via the dialer (didn't know at 1st)
but where you are (if you're on srpint) this is what' was reported happening -
Sprint used to have "same-as-native" 3G service in the western half of Kansas via those carriers, and even used to show it as Native on their coverage maps. Then it changed to Off-Network roaming a couple years ago. They even stopped Native service along I-70 through most of Kansas and eastern Colorado. Sounds like some of those carriers aren't being too accommodating to Sprint nowadays.
via the HoFo App
i didn't know, the hometown of sprint, was having such a hard time covering, it's own home state..
Click to expand...
Click to collapse
That's inaccurate for me as I'm in central KS. That only applies for west KS. I'm in a native market with LTE, NV, and band 25 and 26.
MrObvious said:
I don't want 3g though because my phone has the power to get a signal but if it gets down to 1 bar roughly (driving between towers and I'm in a fairly big city so it's not a coverage/reception issue) and it drops to 3g, despite the fact that it'll get stronger if it waits 5 more seconds.
Click to expand...
Click to collapse
ok.. central ks..
what were your settings prior, to lte only?
Just LTE/CDMA. There are times I want to set LTE only so I don't drop 4g. Of course I have service with that setting.
Sent from my Nexus 5 using xda app-developers app
you know, that going via the keypad to set LTE only you'll kill the fall back bridge to 1xrtt voice & evdo 3g, right?
& every time you want to have voice service you'd have to do the toggle to undo LTE only , then when you want it back LTE only ..
you say "you don't want evdo 3g" but the devil in the details are, you'll not have voice service ither, that way..
is it worth that trouble?

[Q] OnePlus One LTE BAND selection?

Is there a way to see and change the LTE BAND that my phone is on? Rogers support aws, 2600, 700. So I was wondering if I could manually change between them. The S5 has that option in the hidden menu, so I'm hoping I could do the same on this one.
Thanks.
The phone choose the band himself, if he don't find bands authorized by your phone company, he can't use them.
tonymtl said:
Is there a way to see and change the LTE BAND that my phone is on? Rogers support aws, 2600, 700. So I was wondering if I could manually change between them. The S5 has that option in the hidden menu, so I'm hoping I could do the same on this one.
Thanks.
Click to expand...
Click to collapse
*#*#46363#*#* > Phone information > Set Preferred Network Type > 'LTE/GSM auto (PRL)'
That's as far as you can get in telling it what network to operate on. It won't let you select specific bands (at least not stock). Mine was set to 'TD-SCDMA, GSM and LTE' out of the box (international version) and since I don't plan to use my phone in China anytime soon, it didn't make sense for the phone to waste resources searching for a TD-SCDMA (China's homebrew 4G) signal. Haven't noticed much improvement to my LTE signal though, still the weakest radio I've seen in a 'flagship' in a while.
Thanks.
I am also on Rogers.
Does that mean when I am on the phone, it will revert to EDGE instead of 3g by using the LTE-edge setting?
I have major issues with reception on this phone.
LTE Works Fine but the 3G/H+ signal is awful, absolute disaster on this phone. It is extremely, extremely weak. And I lose coverage often and over 50% of the times my calls go straight to voicemail because Rogers uses 2g/3g for calling. The phone can't drop back to 2G or 3G in time to receive calls when on LTE
Rly frustrating. Have tried playing with all the settings.
Same issue
hashim71 said:
I have major issues with reception on this phone.
LTE Works Fine but the 3G/H+ signal is awful, absolute disaster on this phone. It is extremely, extremely weak. And I lose coverage often and over 50% of the times my calls go straight to voicemail because Rogers uses 2g/3g for calling. The phone can't drop back to 2G or 3G in time to receive calls when on LTE
Rly frustrating. Have tried playing with all the settings.
Click to expand...
Click to collapse
I'm having issues with 3G H+ too. Dont know its CM issue or not coz I had nice H+ signals on Color OS...
Can't even use internet data. most of the time network drops after using internet for a bit.. Network just suddenly gone and after that it comes back with no internet. Internet comes back online after a while...
Really worried.. and annoyed coz can't seem to find any solve for this. Even Mahdi rom had this issue..

How do I know if I'm getting 4g signal?

I just changed the old seem I've had for a few years to a new "4g compatible" sim card since my new moto g has 4g. The thing is there has been no change in the icon I get on my status bar when I'm not connected to any WiFi. It's still a letter H and the signal triangle. Is the icon supposed to be different when I get 4g?
It is suppoded to say 4G or LTE, depenidng on the rom. I get LTE on custom roms and 4G n stock. Also check on the mobile networks settings the prefered type is 4G
It varies by model, carrier, and country. Symbols you will see for 4G are: 4G, LTE, H, H+. Like the previous post said make sure you have 4G/LTE select as preferred in your network settings. You can test your speed to see if it's 4G with apps like Speedtest from the Play Store.
https://play.google.com/store/apps/details?id=org.zwanoo.android.speedtest&hl=en
bobbyphoenix said:
It varies by model, carrier, and country. Symbols you will see for 4G are: 4G, LTE, H, H+. Like the previous post said make sure you have 4G/LTE select as preferred in your network settings. You can test your speed to see if it's 4G with apps like Speedtest from the Play Store.
https://play.google.com/store/apps/details?id=org.zwanoo.android.speedtest&hl=en
Click to expand...
Click to collapse
Speedtest isn't really a reliable way of determining connection type, I have seen areas where 3G/HSPA is much faster than LTE and other places where LTE is 100 times faster than 3G. The best way is by the symbol next to your mobile connection when WiFi is off, or use an app like Network Signal Info which will give you very detailed information about both your mobile and wifi connections.

Categories

Resources