Related
Does anyone know if the Verizon Trophy will do CDMA on AWS with the correct PRL on any of the available radio software?
Also is there a app or a way to show cdma call info such as channel, PN, rssi?
http://www.microsoft.com/windowsphone/en-us/buy/7/details.aspx?id=1685
It says "HSPA:AWS 2100" and that is the GSM Trophy. I think its safe to assume that the Verizon model supports it as well + CDMA.. but.. well.. AWS is new one on me. I won't pretend to fully understand what your talking about. XD *haha* I better go do some reading.
TheXev said:
http://www.microsoft.com/windowsphone/en-us/buy/7/details.aspx?id=1685
It says "HSPA:AWS 2100" and that is the GSM Trophy. I think its safe to assume that the Verizon model supports it as well + CDMA.. but.. well.. AWS is new one on me. I won't pretend to fully understand what your talking about. XD *haha* I better go do some reading.
Click to expand...
Click to collapse
AWS is advanced wireless services. It's the FCC name for the band of spectrum the 1700 and 2100mhz range.
What I'm not really sure about is if the same radio is used for both CDMA and HSPA. The phone can do AWS if using HSPA, but it uses the cellular and PCS bands for CDMA. (800 and 1900mhz)
The issue is that the radio need to be programmed for those bands and there is hardware needed to make it happen. So a phone programmed for 800mhz can't just switch to 2100mhz unless there is hardware present.
The Verizon version of the phone might just have an extra radio thrown into the case that operates seperatly from the GSM one. If that is the case then it wouldn't be possible to use CDMA on that frequency. If it's all tied into the same radio then it seems like it could be done in software. In either case I'm not sure if will ever happen because you'd probably need to write your own firmware to do so. (It really wouldn't make sense for HTC to waste time seeing if the phone would do CDMA on 2100 if it wasn't designed to)
For reference there is a great article covering the bands here:
http://www.phonescoop.com/articles/article.php?a=99
There is also the full version of the spectrum chart online here: http://www.ntia.doc.gov/files/ntia/publications/2003-allochrt.pdf
There is a dev screen you can get to on the phone to show signal strength and a few other options. If you dial ##634# you can select field trial. You can see Channel #, band class, Active Set Pilot PN, Rx Signal Strengh, Rx Power (dbm) under the EVDO screen. There is also a section for 1x and GPS. I'm not sure if another option shows up for HSPA if the phone is on GSM...
EDIT: The best I can tell is that AWS uses UMTS/WCDMA so the phone should support that. HSPDA is just a faster version of WCDMA so since the phone can do HSPDA on 2100mhz it would be able to slow down to WCDMA speeds. The only time I could see it possibly being an issue is if CDMA was being used on 2100mhz and not UMTS.
Only thing I am seeing inside of the newest Verizon Trophy software (mango v3 8107) is that they added support for CMAS.
Code:
[HKEY_LOCAL_MACHINE\Software\Microsoft\ShortMsg\Settings]
"CmasOperatorEnabled"=dword:1
[HKEY_CURRENT_USER\Software\Microsoft\ShortMsg\Settings]
"CMASAlertOption"=dword:1
[HKEY_CURRENT_USER\Software\Microsoft\SMS\Broadcast]
"TestPort"=dword:4370
As for radio, there is only one radio software.. but from what I can tell, the CPU/radio has all the same support as the Trophy GSM, but with the added CDMA. AWS should work, but only via GSM bands.
Does UK LG G2 (D802) support LTE Band 20 (800 MHz) used by O2 UK?
Does anyone know this?
Use info command
okgnew said:
Does anyone know this?
Click to expand...
Click to collapse
1) Go to Phone, just enter following command,
*#*#4636#*#* (no need to press Green Dial Button after this).
2) Once you enter last *, Testing menu will appear. From that menu,select "Phone Information"
3) Scoll down little and you will see "Set Preferred network type". There is dropdown at this location which shows all the networks.
Just note,This is testing menu. It will show all the options like CDMA/WCDMA, GSM, LTE etc. It does not mean that all the networks are supported.
Just insert LTE sim and change option of preferred network from above list to LTE only and check if that works.
Officially it supports 850, 900 bands. But I am wondering if the bands are only controlled software side seeing that the antennas and hardware seem to be streamlined across all versions.
On the box it says:
LG-D802
LTE 2100/1800/2600/900/800
6GB
BLACK BLACK
Thank you for the test menu you solved my problem I just bought the d802 would not work on my 4g sim in uk changed to lte and all good thanks.
Sorry to bring this one back form the dead but the original question doesn't appear to be answered to me...?
I am on Three in the UK and they are rolling out 4G on 800Mhz and 1800Mhz. Complete noob here, but from what I have read 800Mhz has greater range and building penetration (at the expense of some speed), which is great. Except that the G2 doesn't actually support 800Mhz LTE, or does it?
yogG2 said:
1) Go to Phone, just enter following command,
*#*#4636#*#* (no need to press Green Dial Button after this).
2) Once you enter last *, Testing menu will appear. From that menu,select "Phone Information"
3) Scoll down little and you will see "Set Preferred network type". There is dropdown at this location which shows all the networks.
Just note,This is testing menu. It will show all the options like CDMA/WCDMA, GSM, LTE etc. It does not mean that all the networks are supported.
Just insert LTE sim and change option of preferred network from above list to LTE only and check if that works.
Click to expand...
Click to collapse
I'm on Tesco mobile (O2) and have the 32GB D802, and my 4G wasn't working in central Manchester (could only get HSDPA) Just followed your instructions and boom, 4G instantly with full signal inside 16mbps on speed test
mole51 said:
I'm on Tesco mobile (O2) and have the 32GB D802, and my 4G wasn't working in central Manchester (could only get HSDPA) Just followed your instructions and boom, 4G instantly with full signal inside 16mbps on speed test
Click to expand...
Click to collapse
same here with tesco, set the above and worked fine, but after restart just defaults back to gsm/wcdma auto as preferred and need to go through the steps again to achieve 4g. Anyway to save this as preferred?
markgranto said:
same here with tesco, set the above and worked fine, but after restart just defaults back to gsm/wcdma auto as preferred and need to go through the steps again to achieve 4g. Anyway to save this as preferred?
Click to expand...
Click to collapse
+1 Same here. would like to know as well. Kinda dumb that LG doesn't have LTE as a choice on an LTE supported device...
---------- Post added at 11:44 AM ---------- Previous post was at 11:38 AM ----------
markgranto said:
same here with tesco, set the above and worked fine, but after restart just defaults back to gsm/wcdma auto as preferred and need to go through the steps again to achieve 4g. Anyway to save this as preferred?
Click to expand...
Click to collapse
I found and downloaded the free app 4G LTE Switch from the play store to help with this.
While it doesn't solve the problem of having to manually select LTE after each reboot, it saves you from having to dial the code yourself. Instead, just launch the app and it takes you right to those settings. I find it very useful and time saving! :good:
islandboy_2000 said:
+1 Same here. would like to know as well. Kinda dumb that LG doesn't have LTE as a choice on an LTE supported device...
---------- Post added at 11:44 AM ---------- Previous post was at 11:38 AM ----------
I found and downloaded the free app 4G LTE Switch from the play store to help with this.
While it doesn't solve the problem of having to manually select LTE after each reboot, it saves you from having to dial the code yourself. Instead, just launch the app and it takes you right to those settings. I find it very useful and time saving! :good:
Click to expand...
Click to collapse
cheers for the heads up, i'll give it a bash, still find it very strange that a 4G phone doesn't come with an easier way to actually activate 4G.
markgranto said:
cheers for the heads up, i'll give it a bash, still find it very strange that a 4G phone doesn't come with an easier way to actually activate 4G.
Click to expand...
Click to collapse
No problem man. I didn't give up searching and actually followed this thread, where it says "No 4G/LTE?" and tried putting my networks actualy LTE band (17) in there instead of 11 and 13. While it now gived the option of selectiong LTE in the dropdown menu of preferred networks, for some stupid reason, the phone STILL doesn't save the setting and you still have to go back to the menu again after a restart to enable LTE.
While it is even easier than the method I said earlier, still frustrating that even after selecting it in the menu, that it still defaults back to GCM/CDMA!
There just HAS to be a way to make this stick. Any devs out there who could look into this further???
The thread: http://forum.xda-developers.com/showthread.php?t=2681205
Hello,
I am from Portugal, so your mobile could say something rather different. But in essence is all the same.
My version is the D802, International model, just like yours.
1.st step - Provider:
The provider part is always the first to be deal with.
Make sure you go to your operator and ask to enable your SIM-card to have access to LTE.
2.nd step - Equipment:
Go to Definitions -> "Network" tab -> "Sharing connecting & Network" on the bottom -> "Mobile Network" third from last ->
a) Make sure that "Enable Data" is checked;
b) Go to "Network Mode" and choose the option: "GSM (2G) / WCDMA (3G) / LTE (4G) auto".
This way you will always have automatic access to the best network available.
All the people who choose the 4G/LTE only option should check this mode, so you can access 3G when 4G is not available, instead of having no connecting.
Any doubt you have, just ask!
Best regards.
hitardo said:
Hello,
I am from Portugal, so your mobile could say something rather different. But in essence is all the same.
My version is the D802, International model, just like yours.
1.st step - Provider:
The provider part is always the first to be deal with.
Make sure you go to your operator and ask to enable your SIM-card to have access to LTE.
2.nd step - Equipment:
Go to Definitions -> "Network" tab -> "Sharing connecting & Network" on the bottom -> "Mobile Network" third from last ->
a) Make sure that "Enable Data" is checked;
b) Go to "Network Mode" and choose the option: "GSM (2G) / WCDMA (3G) / LTE (4G) auto".
This way you will always have automatic access to the best network available.
All the people who choose the 4G/LTE only option should check this mode, so you can access 3G when 4G is not available, instead of having no connecting.
Any doubt you have, just ask!
Best regards.
Click to expand...
Click to collapse
Step 2 in bold, that's not an option. 3 options are
1. GSM / WCDMA auto
2. WCDMA only
3. GSM only
However when using the 4G switcher app you can change it to GSM (2G) / WCDMA (3G) / LTE (4G) auto and it works fine, but on reboot just defaults back to GSM / WCDMA auto.
Our D802 supports 1800 Mhz and 2600 Mhz frequencies for sure.
But to get the LTE toggle to show up in the network selection menu, we need to insert a LTE capable sim or usim. Tried and tested and not a here say.
If you do not get LTE option in network selection then your sim is not LTE capable. Simple.
sanke1 said:
Our D802 supports 1800 Mhz and 2600 Mhz frequencies for sure.
But to get the LTE toggle to show up in the network selection menu, we need to insert a LTE capable sim or usim. Tried and tested and not a here say.
If you do not get LTE option in network selection then your sim is not LTE capable. Simple.
Click to expand...
Click to collapse
Well the sim I have is LTE capable, When I change the options with the 4G switcher app I instantly get the 4G signal and can get speeds of near 50mbps.
markgranto said:
Step 2 in bold, that's not an option. 3 options are
1. GSM / WCDMA auto
2. WCDMA only
3. GSM only
However when using the 4G switcher app you can change it to GSM (2G) / WCDMA (3G) / LTE (4G) auto and it works fine, but on reboot just defaults back to GSM / WCDMA auto.
Click to expand...
Click to collapse
The option in my phone is:
"GSM (2G) / WCDMA (3G) / LTE (4G) auto"
All this information at one option.
So the phone can choose the highest band level.
This is a problem with your ROM or a problem with your SIM.
And, as I said in my first post, go always first to your provider and ask him form help.
Making sure the SIM part is enabled and fully accessible.
The bands are not important here.
That is because, if you bought your smartphone in the UK, LG made available the D802 model to make your smartphone antenna frequencies correspond to those available at your country.
This will matter if you want to achieve maximum speed of 150Mbps.
But if you want just the regular user experience, you sure have access to LTE network.
In wikipedia (I could not find a good source, as GSMArena make no reference on the version D802)
Wikipedia -> LG G2 -> Specifications
D802 supports 4G/LTE bands:
800, 900, 1800, 2100, 2600
And here you can see the bands of your provider/network:
Wikipedia -> List of LTE networks -> Europe
EE: 1800, 2600
Hutchison 3: 800, 1800
O2: 800
UK Broadband: 3500, 3600
Vodafone: 800
This is wikipedia information, so take this with a pinch of salt, and search for a better source.
hitardo said:
The option in my phone is:
"GSM (2G) / WCDMA (3G) / LTE (4G) auto"
All this information at one option.
So the phone can choose the highest band level.
This is a problem with your ROM or a problem with your SIM.
And, as I said in my first post, go always first to your provider and ask him form help.
Making sure the SIM part is enabled and fully accessible.
The bands are not important here.
That is because, if you bought your smartphone in the UK, LG made available the D802 model to make your smartphone antenna frequencies correspond to those available at your country.
This will matter if you want to achieve maximum speed of 150Mbps.
But if you want just the regular user experience, you sure have access to LTE network.
In wikipedia (I could not find a good source, as GSMArena make no reference on the version D802)
Wikipedia -> LG G2 -> Specifications
D802 supports 4G/LTE bands:
800, 900, 1800, 2100, 2600
And here you can see the bands of your provider/network:
Wikipedia -> List of LTE networks -> Europe
EE: 1800, 2600
Hutchison 3: 800, 1800
O2: 800
UK Broadband: 3500, 3600
Vodafone: 800
This is wikipedia information, so take this with a pinch of salt, and search for a better source.
Click to expand...
Click to collapse
Its a UK sim free handset, and i'm on tesco (which is O2).
Sim card is fine as tested in another 4G phone and defaults to 4G as it should after collecting the APN settings from the network. Checked the APN and both the exact same compared to the one the LG G2 is using.
I'm using stock rom and this happened initially on JB, then updated to KK, factory reset, and still the same, then updated last week, still the same.
From reading this thread looks like i'm not the only one.
markgranto said:
Its a UK sim free handset, and i'm on tesco (which is O2).
Sim card is fine as tested in another 4G phone and defaults to 4G as it should after collecting the APN settings from the network. Checked the APN and both the exact same compared to the one the LG G2 is using.
I'm using stock rom and this happened initially on JB, then updated to KK, factory reset, and still the same, then updated last week, still the same.
From reading this thread looks like i'm not the only one.
Click to expand...
Click to collapse
Wikipedia, and other websites, say O2 only acquired 800MHz band for LTE.
And LG G2 D802 only supports:
850 (band 5), 900 (band 8), 1800 (band 3), 2100 (band 1), 2600 (band 7) MHz.
I saw this at PhoneArena, GSMArena and ATGSM.
This brings a problem for people which their carrier only emits LTE at 800MHz, when not supported by come smartphones.
But I recommend you all to ask LG about the frequencies supported by the LG G2 D802 version, and ask your network carrer/ provider for LTE frequencies.
That way you will be absolutely sure about its compatibility or not.
hitardo said:
Wikipedia, and other websites, say O2 only acquired 800MHz band for LTE.
And LG G2 D802 only supports:
850 (band 5), 900 (band 8), 1800 (band 3), 2100 (band 1), 2600 (band 7) MHz.
I saw this at PhoneArena, GSMArena and ATGSM.
This brings a problem for people which their carrier only emits LTE at 800MHz, when not supported by come smartphones.
But I recommend you all to ask LG about the frequencies supported by the LG G2 D802 version, and ask your network carrer/ provider for LTE frequencies.
That way you will be absolutely sure about its compatibility or not.
Click to expand...
Click to collapse
wikipedia is saying....LTE band support 800/900/1800/2100/2600, however tesco (o2) are definitely on 800mhz, so must be something to do with LG so it will no doubt be them who has to answer the question, and never do anything about it.
Hello,
I have been using my Meizu MX5 for about two months now without the 4G network working. I have recently updated to the latest firmware and I am currently running Flyme OS 4.5.2.7A and that has not solved any issues either.
I have checked that the phone settings are configured properly.
Network Mode is set to "4G First".
The phone is pending between, H-, H and H+ connection (3G I believe?)
I have checked with my provider and these are the following frequencies which should be providing 4G in my country (Sweden) for the provider:
800Mhz, 900MHz, 1800MHz, 2600MHz
Other providers have the same frequencies as well.
I have also gotten two new SIM-Cards during this period of time without it solving any issues. I have tried the SIM cards in some other phones and they get 4G connection without any issues.
I have been in contact with Meizu customer support in China and after some random troubleshooting of factory resetting and reinstalling the same firmware on the phone without solving anything.
They have also provided me information regarding the different bands/frequencies which the phone operates on:
GSM/GPRS/EDGE (900/1800/1900MHz)
WCDMA/HSPA+: Band 1/2/8 (900/2100MHz)
FDD LTE: Band 1/3 (1800/2100MHz)
TD-SCDMA: Band 34/39 (no freqency specified)
TD-LTE: Band 38/39/40/41 (no frequency specified)
I am not 100% sure on how this works but according to the information I am given, the phone and my provider share at least one frequency for the 4G network and therefore I do not understand why it is not working.
I am sure that it is software related and thus I won't send my phone back to China (4-8 weeks delivery time and all expenses has to be paid by me) for them to troubleshoot.
Anyone here who has knowledge which could give me an answer?
Kind regards,
Martin
Hi mate.
I had this problem but upgraded to new firmware late last night and it came on. Thankfully!
Give it a try
Hi,
I have checked the upgrade app on the phone and it says I have the latest firmware.
Which firmware version are you running?
Kind regards,
Martin
Maybe it is an APN related problem. Look if you have the same data as in the other phones that 4G works
iicc said:
Maybe it is an APN related problem. Look if you have the same data as in the other phones that 4G works
Click to expand...
Click to collapse
Hi iicc,
Thank you for the reply.
I have checked the APN settings about four-five times and I can't find any inconsistencies. I have even crosschecked it with a support technician from my provider.
The only things I can think of is either my anntenna being gimped, that the firmware is not properly developed or that somehow there's trash in my system and that my phone maybe needs a complete wipe and reinstallation.
After the upgrade to firmware 4.5.2.7A the phone does not even hint on trying to connect to 4G. Pre-upgrade it atleast connected to 4G for about 5 seconds and then went down to 3G.
Kind regards,
Martin
hawdes said:
Hi iicc,
Thank you for the reply.
I have checked the APN settings about four-five times and I can't find any inconsistencies. I have even crosschecked it with a support technician from my provider.
The only things I can think of is either my anntenna being gimped, that the firmware is not properly developed or that somehow there's trash in my system and that my phone maybe needs a complete wipe and reinstallation.
After the upgrade to firmware 4.5.2.7A the phone does not even hint on trying to connect to 4G. Pre-upgrade it atleast connected to 4G for about 5 seconds and then went down to 3G.
Kind regards,
Martin
Click to expand...
Click to collapse
And have you tried to factory data reset the phone?
hawdes said:
Hello,
I have been using my Meizu MX5 for about two months now without the 4G network working. I have recently updated to the latest firmware and I am currently running Flyme OS 4.5.2.7A and that has not solved any issues either.
I have checked that the phone settings are configured properly.
Network Mode is set to "4G First".
The phone is pending between, H-, H and H+ connection (3G I believe?)
I have checked with my provider and these are the following frequencies which should be providing 4G in my country (Sweden) for the provider:
800Mhz, 900MHz, 1800MHz, 2600MHz
Other providers have the same frequencies as well.
I have also gotten two new SIM-Cards during this period of time without it solving any issues. I have tried the SIM cards in some other phones and they get 4G connection without any issues.
I have been in contact with Meizu customer support in China and after some random troubleshooting of factory resetting and reinstalling the same firmware on the phone without solving anything.
They have also provided me information regarding the different bands/frequencies which the phone operates on:
GSM/GPRS/EDGE (900/1800/1900MHz)
WCDMA/HSPA+: Band 1/2/8 (900/2100MHz)
FDD LTE: Band 1/3 (1800/2100MHz)
TD-SCDMA: Band 34/39 (no freqency specified)
TD-LTE: Band 38/39/40/41 (no frequency specified)
I am not 100% sure on how this works but according to the information I am given, the phone and my provider share at least one frequency for the 4G network and therefore I do not understand why it is not working.
I am sure that it is software related and thus I won't send my phone back to China (4-8 weeks delivery time and all expenses has to be paid by me) for them to troubleshoot.
Anyone here who has knowledge which could give me an answer?
Kind regards,
Martin
Click to expand...
Click to collapse
Let me try to come up with something that might be your problem. If you are using 3 as your mobile provider then they use FDD-LTE band 7 & 20 none of which are supported by the MX5 and 3 are also using TDD-LTE band 38 which is supported by the MX5, but might not be available in your area.
If you are on Net4Mobility then they use FDD-LTE 3,7,8 & 20 of which only 3 is supported, so it could that in your area there is no coverage with band 3.
If you are on Telia, the story is pretty much the same as Net4Mobility as they use FDD-LTE 3,7 & 20.
In order to get more from your phone. You can open up google and search for 'meizifan eu' and go to the website. They have a pretty good description of how you install the international version of FlyMe on your MX5, the international version is called 4.5.2.7i. I believe it activates some other FDD-LTE and TDD-LTE bands.
1800Mhz band is a short range, higher bandwidth frequency which usually is less common and given that it has a short range it most likely isn't available in your area.
nasty_suicide said:
Let me try to come up with something that might be your problem. If you are using 3 as your mobile provider then they use FDD-LTE band 7 & 20 none of which are supported by the MX5 and 3 are also using TDD-LTE band 38 which is supported by the MX5, but might not be available in your area.
If you are on Net4Mobility then they use FDD-LTE 3,7,8 & 20 of which only 3 is supported, so it could that in your area there is no coverage with band 3.
If you are on Telia, the story is pretty much the same as Net4Mobility as they use FDD-LTE 3,7 & 20.
In order to get more from your phone. You can open up google and search for 'meizifan eu' and go to the website. They have a pretty good description of how you install the international version of FlyMe on your MX5, the international version is called 4.5.2.7i. I believe it activates some other FDD-LTE and TDD-LTE bands.
Click to expand...
Click to collapse
Thank you for the reply nasty_suicide!
I am using Comviq Tele2 as provider, which should use the Telia net.
This is what I believe as well, but I really thought there was no way to flash the international version onto the phone and was about to abandon ship by buying a new phone yet again.
I will try to install the International version as soon as I have time to follow through the steps. I have found the guide on Meizufans.
Once I have installed the international version I'll let everyone know the outcome.
Kind regards,
Martin
Hi Hawdes,
I've exactly the same problem as you do, please post back once you instal I version. I was planning to do so but since I already have everything installed I didn't want to go through trouble for nothing.
What were the results of this? Is it true that firmware can affect the signal received?
upgraded to the latest firmware yet?
Samsung galaxy s7 4G problem
What about in Samsung galaxy s7 version of Flyme OS?? I cannot see 4G option.
I have a problem with the Samsung Galaxy S8 unlocked, carrier-free USA version (SM-G950U1) and the way it interacts (or fails to interact) with certain cell towers/bands/frequencies while trying to connect with T-Mobile.
Inside some large buildings, it doesn't get a signal. What *appears* to be happening, based on my limited knowledge of these things, is that the phone can't see/maintain a connection to any LTE or GSM signals, and keeps defaulting to CDMA.
Other phones DO have service at the same time and place, *including* my Galaxy S5 with the same T-Mobile sim card that I'm trying to use in my S8. I can take my S8 outside (or into many other buildings) and it maintains an LTE/GSM signal without problems. The trouble spots are consistent, so this is annoying to debug because I have to go to certain places, but once I'm there, the problem reliably happens.
Since my old phone with my current sim card still works in these same locations, I don't think it's exclusively a carrier problem, and is either a) something wrong with the phone, or b) something wrong with the interaction between T-Mobile and the unlocked Galaxy S8. Because I can't find discussion anywhere online about option B, I've been assuming it was option A. However, I've tested 2 S8's so far and both had the same problem, so now I'm not sure what to think. I've just picked up a third S8 that I'll test in the next few days.
All the S8's are running the latest stock Touchwiz software and are not rooted.
Does anyone know enough about these things to help? I'm attaching screenshots of info from the app LTE Discovery - all tests are using the same T-Mobile sim card except in one case, as noted:
** (QA) S8 at location "V", with no LTE and a HSPA+ signal -103 dBm. It appears to be connecting to/only see CDMA towers.
** (QB) S8 at "V", with no LTE and a GSM (?) signal -97 dBm.
** (QC) S8 at "V", with a VERIZON sim card that I briefly borrowed to test with, with LTE on band 13 with -108 dBm and a CDMA 1xRTT signal at -96 dBm.
** (QD) S5 at "V", an LTE signal on band 4 with -113 dBm and GSM -69 dBm.
** (QE) S8 at location "P", with no LTE and a HSPA+ signal -99 dBm. It appears to be connecting to/only see CDMA towers.
** (QF) S8 at "P", with no LTE and a CDMA (?) signal -89 dBm.
** (QG) S8 at "P", with an LTE signal on band 2 (through a CDMA tower?) at -130 dBm. The cell radio is "connecting" and it sees a bunch of LTE and GSM towers that it apparently decides not to use...
** (QH) S5 at "P", an LTE signal on band 4 with -113 dBm and GSM -75 dBm.
What on earth is going on? Anyone else experiencing this? Your insights are appreciated!
(This is a follow up to the thread I posted at https://forum.xda-developers.com/galaxy-s8/help/s8-signal-loss-buildings-phones-4g-lte-t3660313)
(Also possibly of interest, discussion of this same question at https://www.reddit.com/r/tmobile/comments/7351hb/galaxy_s8_unlocked_smg950u_not_maintaining_tmo/)
dovesong said:
I have a problem with the Samsung Galaxy S8 unlocked USA version (SM-G950U) and the way it interacts (or fails to interact) with certain cell towers/bands/frequencies while trying to connect with T-Mobile.
Inside some large buildings, it doesn't get a signal. What *appears* to be happening, based on my limited knowledge of these things, is that the phone can't see/maintain a connection to any LTE or GSM signals, and keeps defaulting to CDMA.
Other phones DO have service at the same time and place, *including* my Galaxy S5 with the same T-Mobile sim card that I'm trying to use in my S8. I can take my S8 outside (or into many other buildings) and it maintains an LTE/GSM signal without problems. The trouble spots are consistent, so this is annoying to debug because I have to go to certain places, but once I'm there, the problem reliably happens.
Since my old phone with my current sim card still works in these same locations, I don't think it's exclusively a carrier problem, and is either a) something wrong with the phone, or b) something wrong with the interaction between T-Mobile and the unlocked Galaxy S8. Because I can't find discussion anywhere online about option B, I've been assuming it was option A. However, I've tested 2 S8's so far and both had the same problem, so now I'm not sure what to think. I've just picked up a third S8 that I'll test in the next few days.
All the S8's are running the latest stock Touchwiz software and are not rooted.
Does anyone know enough about these things to help? I'm attaching screenshots of info from the app LTE Discovery - all tests are using the same T-Mobile sim card except in one case, as noted:
** (QA) S8 at location "V", with no LTE and a HSPA+ signal -103 dBm. It appears to be connecting to/only see CDMA towers.
** (QB) S8 at "V", with no LTE and a GSM (?) signal -97 dBm.
** (QC) S8 at "V", with a VERIZON sim card that I briefly borrowed to test with, with LTE on band 13 with -108 dBm and a CDMA 1xRTT signal at -96 dBm.
** (QD) S5 at "V", an LTE signal on band 4 with -113 dBm and GSM -69 dBm.
** (QE) S8 at location "P", with no LTE and a HSPA+ signal -99 dBm. It appears to be connecting to/only see CDMA towers.
** (QF) S8 at "P", with no LTE and a CDMA (?) signal -89 dBm.
** (QG) S8 at "P", with an LTE signal on band 2 (through a CDMA tower?) at -130 dBm. The cell radio is "connecting" and it sees a bunch of LTE and GSM towers that it apparently decides not to use...
** (QH) S5 at "P", an LTE signal on band 4 with -113 dBm and GSM -75 dBm.
What on earth is going on? Anyone else experiencing this? Your insights are appreciated!
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US Unlocked S8's model # is: G950U1. I have the same model and used it on T-Mobile for about 2 months before flashing firmware on it. My work building has Band 4 and Band 12. There are spots in the building where phone would have low Band 4 signal, then would connect to Band 12. I haven't seen any weird behavior of the signal in my building. The reason I keep bringing my building as an example is because it is very tricking for phones without band 12 to properly have signal there, at least on T-Mobile.(haven't checked other carriers)
Then I flashed my phone with T-Mobile firmware and continue to have coverage as I did when my phone was running an unlocked firmware. You could flash your phone with T-Mobile's firmware which will give you all T-Mobile features, but will also give you few of their apps, but they can be disabled.
If you decide to flash the phone, use "flashing standard firmware" option - https://forum.xda-developers.com/galaxy-s8/how-to/snap-guide-flashing-standard-fw-carrier-t3625817
Charkatak said:
US Unlocked S8's model # is: G950U1. I have the same model and used it on T-Mobile for about 2 months before flashing firmware on it. My work building has Band 4 and Band 12. There are spots in the building where phone would have low Band 4 signal, then would connect to Band 12. I haven't seen any weird behavior of the signal in my building. The reason I keep bringing my building as an example is because it is very tricking for phones without band 12 to properly have signal there, at least on T-Mobile.(haven't checked other carriers)
Then I flashed my phone with T-Mobile firmware and continue to have coverage as I did when my phone was running an unlocked firmware. You could flash your phone with T-Mobile's firmware which will give you all T-Mobile features, but will also give you few of their apps, but they can be disabled.
If you decide to flash the phone, use "flashing standard firmware" option - https://forum.xda-developers.com/galaxy-s8/how-to/snap-guide-flashing-standard-fw-carrier-t3625817
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Thank you! So you think the S8 isn't properly connecting to band 4 or 12, and that could be the problem? It does look like it might only ever be connecting to bands 2 and 4, so if it doesn't by default connect to band 12, maybe that is the problem. Although my S5 connects to band 4 in both those spots, but my S8 doesn't, so I don't know if band 12 is really the issue.
I have the unlocked AQH3 firmware and bootloader installed now - I assume this is the "XAA" version? If I try flashing the T-Mobile version of that same firmware release, should I expect that to change something about the network settings/capabilities that I can't otherwise change? And this does not require root, correct?
Thanks again!
dovesong said:
Thank you! So you think the S8 isn't properly connecting to band 4 or 12, and that could be the problem? It does look like it might only ever be connecting to bands 2 and 4, so if it doesn't by default connect to band 12, maybe that is the problem. Although my S5 connects to band 4 in both those spots, but my S8 doesn't, so I don't know if band 12 is really the issue.
I have the unlocked AQH3 firmware and bootloader installed now - I assume this is the "XAA" version? If I try flashing the T-Mobile version of that same firmware release, should I expect that to change something about the network settings/capabilities that I can't otherwise change? And this does not require root, correct?
Thanks again!
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Root isn't needed.
I don't really know what changes it will bring as far as networking capabilities, but if it is the T-Mobile firmware, then it most likely be very well suited for its network. Unlocked model still connected to band 12 and I don't know if your city or place has band 12, but you can easily find out by using LTE Discovery app and it will show you. Flashing to T-Mobile firmware gave me the ability to place "video call, have advanced massaging and has DIGITS service build into the phone app" + some people also mention that 4x4 MIMO and 256 QAM are also supported on T-Mobile's firmware + I have read stories that they got better signal as well.
An update, for anyone else having this issue: my best theory has been that the phone was prioritizing non-LTE signals over a weak LTE signal. How I fixed it the first time: enter the BAND service mode via the native dialer by dialing *#2263# (2263 spells BAND). Clear all bands, then select all LTE bands (ONLY LTE) and apply the changes. This forces the phone to use only LTE signals, no matter their strength. It's worth noting that you may need to alter this when traveling through areas without LTE service, by re-entering the menu and selecting all bands and applying the changes.
My phone *just* updated to Oreo, and the problem may be back, although I haven't had a chance to thoroughly test or debug it, yet...
I have a ta-1083 with bands b7 and b28 blocked, I've searched in several places on google and still could not find something that can release these bands,
Has anyone with this problem been able to solve this problem?
I like the device, but it's already boring with this situation
Thank you all
No way. It's not going to happen. Quit wasting your time and buy another phone that has the bands you need.
Thanks for the answer, and this is very sad to read
6.1 plus supports all the bands. You can use this code *#*#4636#*#* to change bands and it works.
gopu5 said:
6.1 plus supports all the bands. You can use this code *#*#4636#*#* to change bands and it works.
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Yes, it runs on 4g, but in bands like b5 and b3, but these are not standard here in Brazil, the network with the largest coverage is b7 that runs at 2600mhz,
So it fluctuates a lot between bands and often loses the signal altogether
I've changed a lot in these settings, but it doesn't solve 100%
JavaDroid_ said:
Yes, it runs on 4g, but in bands like b5 and b3, but these are not standard here in Brazil, the network with the largest coverage is b7 that runs at 2600mhz,
So it fluctuates a lot between bands and often loses the signal altogether
I've changed a lot in these settings, but it doesn't solve 100%
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LTE only option you can choose
gopu5 said:
6.1 plus supports all the bands. You can use this code *#*#4636#*#* to change bands and it works.
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No, you don't know what a band is. You can't use the test menu to add additional LTE bands. Kindly refrain from posting this idiocy here.
I know what is LTE Bands. 6.1 Plus supports all the bands but the fact it is configured in such a way the user can't change it hence the network switches bands automatically.
The LTE Only option configure the network to the 4G but yes you don't have the option to lock a particular frequency unlike other stock Android devices.
I dont know about other countries but here in India I use Jio 4G with 6.1 Plus my phone locks into 850Mhz , 1800Mhz & 2300Mhz (Jio supports it) simultaneously depending upon the conditions in my location.
The Android one might have disabled advanced band locking (FDD & TDD) feature. I'm not talking idiocy here.
gopu5 said:
I know what is LTE Bands. 6.1 Plus supports all the bands but the fact it is configured in such a way the user can't change it hence the network switches bands automatically.
The LTE Only option configure the network to the 4G but yes you don't have the option to lock a particular frequency unlike other stock Android devices.
I dont know about other countries but here in India I use Jio 4G with 6.1 Plus my phone locks into 850Mhz , 1800Mhz & 2300Mhz (Jio supports it) simultaneously depending upon the conditions in my location.
The Android one might have disabled advanced band locking (FDD & TDD) feature. I'm not talking idiocy here.
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You are not talking about the same thing. The OP of this thread wanted to unlock bands that this phone doesn't normally support. We're not talking about "band locking".
Oh yeah this doesn't supports 2600Mhz