Related
I've been back and forth with Samsung over this. My new S8 (the unlocked USA version, SM-G950U1) has a poor signal in some office buildings, frequently losing signal entirely. Other phones at the same time and place have a strong signal with 4G LTE service. We've tried reflashing the software, changing the sim card, and booting it in safe mode. The same sim card in a different phone gets a signal. I've run Open Signal on multiple phones at the same time to compare results and to show to service reps so they can see what's happening, though that gets me no closer to understanding the source of this problem.
In most places, this S8 works fine and has a great signal. Any thoughts about what could be causing it? Has anyone else experienced this?
Due to summer travel, I didn't catch the problem until after my 14-day return period. Samsung claims I need to mail them the defective one "for repair" and plan to be without my phone for 9-11 days, which seems absolutely crazy to me. (I made a big fuss and they offered to expedite it, but that's still 5 days without my phone.) Looking for last-ditch suggestions... anyone? Thank you!
Edit - more technical details including network screenshots posted here: https://forum.xda-developers.com/galaxy-s8/help/galaxy-s8-unlocked-sm-g950u-maintaining-t3680887
Had the same issue. Had to have to repaired.
They changed everything except the screen and frame.
The issue occured after a software update. After repairs the issue returned after the Orea update... but isnt as bad as before. I seem to have lost Band 5.. 850Mhz
My phone also *just* updated to Oreo, and I think the problem may be back in a milder form. I haven't had a chance to really test or debug it, yet.
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.
Good luck! Please let me know if you figure anything out with your phone after its oreo update!
It is because you will not be on the network band that is stronger
Since flashing my phone back to Nougat I still cannot enable band 20 which I need for better signal. So I’m stuck with poor signal
wezzel98765 said:
It is because you will not be on the network band that is stronger
Since flashing my phone back to Nougat I still cannot enable band 20 which I need for better signal. So I’m stuck with poor signal
Click to expand...
Click to collapse
Are you using the unlocked USA version, SM-G950U1 ? If you load the *#2263# service menu, you can't enable/disable LTE band 20?
If that's the case, I'm not sure why that's happening! When you flashed back to Nougat, did that include a flash back to the baseband you were previously on?
I'm using the g950F from UK unlocked to all networks
Almost all networks rely very heavily on Band 20 in my town to provide good coverage- so with our It I have a major problem
Facing same issue - loss of lte signal - s8+ switching to weaker lte band
Just got the S8+ and updated it to the latest OREO. After detailed diagnosis using service codes, the issue is that the phone is definitely prioritize a weaker LTE BAND Signal during radio activity with the network tower.
Getting full signals on with the same SIM card on other phones.
The new service mode is also not operable or I don't know the key yet. Using *#0011# only shows the SERVICE MODE (Stack 1 & Stack 2), but is not navigable using the Q0 and Q 0000 keys.
Anyone found a solution to this problem or do we have to wait for an update to fix this?
Enter the BAND service mode menu via the native dialer by dialing *#2263#
(2263 spells BAND)
If this doesn't work, what android software build are you running? (It still works for me, on my S8, running oreo G950U1UES5CRL2 )
Solved - jan security patch update
Hi, Just got the update for the JAN SECURITY PATCH UPDATE.
Its working fine now. They fixed the bug. So relieved, finally able to use the handset properly now.
Cheers!
dovesong said:
Enter the BAND service mode menu via the native dialer by dialing *#2263#
(2263 spells BAND)
If this doesn't work, what android software build are you running? (It still works for me, on my S8, running oreo G950U1UES5CRL2 )
Click to expand...
Click to collapse
That's excellent! And also interesting; I'm still waiting for my Jan update, and I'm hoping the delay means it will be my PIE upgrade... *crosses fingers*
Hi,
Both my daughter and I have OP2 devices. She runs OOS 3.6.0 and I have Resurrection-Remix-N-5.8.5 (highly recommended BTW), with the latest 3.6.0 firmware. Now, neither of us are able to connect to LTE, but only to 3G. It doesn't seem like an operator issue, as my son's ASUS ZenFone 2 device is able to connect to LTE with the same operator. For what it's worth, I can see using the Network Cell Info Lite app that my device is connected to a nearby 3G antenna, while my son's ZenFone is connected to a more far away 4G antenna. Would appreciate any insight regarding this matter.
OK, found the reason (even if not a very comforting one): Got the US model of this phone, which doesn't support LTE band 3, used by all operators here.
So I have a free spot on my family plan and was thinking I could just get a BYOD sim and stick it in a 4G LTE stick for use with my Android HU. All the ones I have seen has compatible miss all the relevant bands for US use, specifically for AT&T. Does anyone in the US have any suggestions?
I second this thread for Verizon.
Sent from my iPhone using Tapatalk Pro
So I finally got my dongle and SIM card and it is working and pretty much without any extra apps or root.
I purchased the HUAWEI E397 4G usb dongle 100M data card Unlocked 4G LTE MODEM B397Bu-501 - the important part is the -501 at the end they have several models with different band compatibility and the 501 was the one with AT&T compatibility.
On my Eonon GA2167 after I installed the stick the Cellular Networks entry showed up automatically in the options, I was able to edit the APN data there (you will likely want to be connected to wifi when you do this, if it's trying to provision data you wont be able to select APN data). I just copied the APN data from my phone and it worked. Using Cricket (AT&T).
I had some trouble getting it to work at first, it would recognize the USB stick allow me to edit APN and then connect to the network but I had no data connectivity. Eventually it started working. Not sure if this was after I copied every APN setting (previously I had just entered name, apn and the MNC and MCC) once I added the MMS/MMSC data and APN type it started working a little after that. But it could also been on the network side since it was a new SIM I had just activated hours earlier and had been inserted into 2 other phones (to help try to activate it).
Anyway if someone wants a stick that works on AT&T bands in the US this should work. The headunit only shows a 3G connection and reports WCDMA with signal check lite, but I think that's due to the firmware of the HU not being setup for 4G LTE, with a speed test I get about 8-9 Mbps down and 6-7 up, not super fast but I believe that is LTE speeds since HSPDA doesn't support uploads that fast, also the stick itself shows a cyan LED with is meant to be for LTE connected network. Either way its way faster than the wifi connected to the hotspot on my phone (not sure if its the wifi antenna or what but wifi performance is very subpar on this unit). Also it connects quicker on startup (and does so automatically) than wifi.
jakejm79 said:
So I finally got my dongle and SIM card and it is working and pretty much without any extra apps or root.
I purchased the HUAWEI E397 4G usb dongle 100M data card Unlocked 4G LTE MODEM B397Bu-501 - the important part is the -501 at the end they have several models with different band compatibility and the 501 was the one with AT&T compatibility.
On my Eonon GA2167 after I installed the stick the Cellular Networks entry showed up automatically in the options, I was able to edit the APN data there (you will likely want to be connected to wifi when you do this, if it's trying to provision data you wont be able to select APN data). I just copied the APN data from my phone and it worked. Using Cricket (AT&T).
I had some trouble getting it to work at first, it would recognize the USB stick allow me to edit APN and then connect to the network but I had no data connectivity. Eventually it started working. Not sure if this was after I copied every APN setting (previously I had just entered name, apn and the MNC and MCC) once I added the MMS/MMSC data and APN type it started working a little after that. But it could also been on the network side since it was a new SIM I had just activated hours earlier and had been inserted into 2 other phones (to help try to activate it).
Anyway if someone wants a stick that works on AT&T bands in the US this should work. The headunit only shows a 3G connection and reports WCDMA with signal check lite, but I think that's due to the firmware of the HU not being setup for 4G LTE, with a speed test I get about 8-9 Mbps down and 6-7 up, not super fast but I believe that is LTE speeds since HSPDA doesn't support uploads that fast, also the stick itself shows a cyan LED with is meant to be for LTE connected network. Either way its way faster than the wifi connected to the hotspot on my phone (not sure if its the wifi antenna or what but wifi performance is very subpar on this unit). Also it connects quicker on startup (and does so automatically) than wifi.
Click to expand...
Click to collapse
Thank you for this info! Where did you buy yours?
Has anyone tried this on a Joying_JY-UM135N or JY-UM135N2?
When I look at this listing on aliexpress, further down, it lists a number of "Network Bands", including the -501. How should I interpret this? Does the modem support all those bands, or do I have to specify when ordering? When I search for "huawei e397" on Amazon, it shows me a -53 version. Is this the same as the -501, or different? I'm also curious as to why the only hit I get on aliexpress is a listing in the Netherlands. ??
GaryGood said:
Thank you for this info! Where did you buy yours?
Has anyone tried this on a Joying_JY-UM135N or JY-UM135N2?
When I look at this listing on aliexpress, further down, it lists a number of "Network Bands", including the -501. How should I interpret this? Does the modem support all those bands, or do I have to specify when ordering? When I search for "huawei e397" on Amazon, it shows me a -53 version. Is this the same as the -501, or different? I'm also curious as to why the only hit I get on aliexpress is a listing in the Netherlands. ??
Click to expand...
Click to collapse
There are 5 different variants (2 off which offer CDMA/EVDO for 3/2G). They are all the same base stick but vary depending on bands supported.
This website details each on and the bands its supports: https://www.4gltemall.com/huawei-e397-4g-lte-mobile-internet-key.html
I bought mine from Aliexpress, you will want to make sure you specifically get the -501 for AT&T I believe the -53 supports some T-Mobile bands.
You might want to hold off till I can report more tho. After initially getting it working, it is proving to be inconsistent, I'm not sure if its a low power issue (I have ordered a Y USB cable) or something else. The -501 don't support the full compliment of AT&T bands and I'm not sure if that is the problem, it is missing band 2 for 3G and Bands 2, 4 and 12 (though 17 is kind of part of 12). I know in my area they use Band 2 for both LTE and 3G and I'm not sure if that is my issue. I seem to struggle to get it to work at home but if I am driving around town it will pop up and connect, FWIW once its connected its solid even at home until I disconnect and try to reconnect.
I will update has I make progress.
I have the exact same head unit and have the exact same issue, except I live in Australia and I'm pretty sure I have a spare Telstra (AU telco) dongle lying around, so it literally just works right out of the box? I thought these do support 4G, or at least I thought I saw it advertised like that (or maybe those are the Android 8.0 ones). What else have you done with your head unit OP, not many ppl it seems have this model and look to modify it lol.
It supports 4G speeds, when I get a connection in a 4G area on a band my dongle supports, the icon on the headunit shows 3G, but I get 4G speeds. I thinks its just a case of the limited firmware not supporting the icons and reporting for 4G but since all data transfer is handled by the stick then it works at those speeds.
A bit of an update. I bought a USB Y cable in case lower power was an issue, for the first 4 times after getting the cable things worked right away at boot up with no interference, that was a couple of days ago, since then it hasn't happened since. I am likely going to order a Momentum 313U, its AT&T branded and supports its full compliment of bands, but no idea on Android support. The only 2 things I could find about Android support was a generic listing on Aliexpress showing what appeared to be a 313U and stating it was an Android device and a Pilipino website saying it wasn't recognized by an Android Tablet (I think that's what google translate was telling me).
Failing that I will order a Huawei 303C, it supports the full compliment of AT&T 3G bands and is on the confirmed working list. No 4G but I think AT&T still has full coverage of HSPDA in my area along with LTE.
I have the exact same head unit from eonon and purchased the AT&T usb velocity stick off their site and plugged it into the USB port and it does not recognize it. The led is lit up on the stick but nothing on the head unit. It would be nice since this one has external antenna ports and supports LTE. Is there any software I need to install on the head unit?
Another update: I ended up buying a Huawei E303c stick, works on all the AT&T 3G bands and I haven't had an issue with it at all. max download speed has been around 3 Mbps but that is enough for voice commands, Pandora and navigation so I'm happy. I got closer 10+Mbps with the 4G stick, but I only worked some of the time (I think due to AT&T using multiple 4G bands in my area and the stick not supporting them all).
Anyway the Huawei E397 is up for sale and I'll suffer with 3G speeds.
jakejm79 said:
Another update: I ended up buying a Huawei E303c stick, works on all the AT&T 3G bands and I haven't had an issue with it at all. max download speed has been around 3 Mbps but that is enough for voice commands, Pandora and navigation so I'm happy. I got closer 10+Mbps with the 4G stick, but I only worked some of the time (I think due to AT&T using multiple 4G bands in my area and the stick not supporting them all).
Anyway the Huawei E397 is up for sale and I'll suffer with 3G speeds.
Click to expand...
Click to collapse
I just got a Huawei E303c stick for AT&T. I plugged it into my generic Atcgfheny Oreo head unit and it shows no 3G icons. It blinks a blue light, but not connectivity on the head unit. Is there something else I need to configure? I can't find any settings in the menu.
I've just bought a V20 and noticed that it's a Taiwanese model (model LG-H990DS, with TWN firmware). The first two issues that I've noticed are:
- it won't connect to 4G (I'm on Plusnet Mobile, which uses the EE network). It will only connect to 2G according to the notification bar
- it won't connect to either the 2.4GHz or 5GHz wifi networks on my Asus RT-AC68U router (although it will connect to a Belkin access point that I have elsewhere in the house).
Are the above caused by basic hardware incompatibilities, or can they be resolved by a firmware update?
itm said:
I've just bought a V20 and noticed that it's a Taiwanese model (model LG-H990DS, with TWN firmware). The first two issues that I've noticed are:
- it won't connect to 4G (I'm on Plusnet Mobile, which uses the EE network). It will only connect to 2G according to the notification bar
- it won't connect to either the 2.4GHz or 5GHz wifi networks on my Asus RT-AC68U router (although it will connect to a Belkin access point that I have elsewhere in the house).
Are the above caused by basic hardware incompatibilities, or can they be resolved by a firmware update?
Click to expand...
Click to collapse
Hi
The H990DS should have no problem connecting EE network as it is The Global version and supports LTE bands 3,7 and 20 which are used in UK and EE uses 3 and 7. I have a Verizon V20 which I use on Virgin and it has no problem connecting as Virgin piggyback on EE as well.
It may be your firmware needs updating.
Sent from my Nokia 7 plus using Tapatalk
Stransky said:
Hi
The H990DS should have no problem connecting EE network as it is The Global version and supports LTE bands 3,7 and 20 which are used in UK and EE uses 3 and 7. I have a Verizon V20 which I use on Virgin and it has no problem connecting as Virgin piggyback on EE as well.
It may be your firmware needs updating.
Click to expand...
Click to collapse
My current firmware is V10i-TWN-XX. Should I be looking for a different version? If so, what's the recommended way of obtaining and flashing it?
That is the most current version of the firmware.
Theoretically Oreo will be released in August, barring further delays.
Silly thoughts:
Which SIM card slot is the SIM in? 1 or 2? It can make a difference when using two SIM's - only one will get 4G/LTE while the other gets 2G.
Is the phone new, never previously been used?
Finally see the attached screenshot of the network settings under: Networks/More/Mobile Networks/Network Mode. If for some reason it got set to 2G that could be the problem.
Note: I'm only using 3G network access so that's why in the screenshot it only shows 3G (Notification bar) even though it's set to auto LTE.
As for the WiFi issues, mine seems to be a bit quirky in not always connecting to some routers, 99% is no problem then you can run into one that for what ever reason it refuses to connect. At the radio station I work at (part time) my V20 simply refuses to connect even though I have the password. Works fine with my tablet & Motorola phone but no go on the V20. Go figure.
Best of luck figuring it out.
itm said:
My current firmware is V10i-TWN-XX. Should I be looking for a different version? If so, what's the recommended way of obtaining and flashing it?
Click to expand...
Click to collapse
Thanks for that. I have my SIM in the SIM1 slot, and my Preferred Network Mode is GSM/WCDMA/LTE Auto, which I guess is correct. The phone is second-hand (bought from Music Magpie).
I have now managed to get 3G (with "H" displayed - HSPA presumably), but I haven't been able to get 4G anywhere that I've travelled in London so far.
In the last day it has also finally recognised my Asus router, so that's a big step forward.
Hey i have an lg v20 h990n as far as can tell from reading specs its got the same frequencies and bands mine works totally fine with ee o2 and vodafone its suppose to work with three ... it also works with my tp link vr600v2 works fine with 5ghz and 2.4ghz also my sisters and partners carrier supplied routers i might suggest that you received a defective one id return it if you cant get it sorted music magpie charge loads too for this phone
Rakuten Mobile (partner: AU mobile) in Japan is an MVNO that has a new UN-LIMIT plan.
There are many phones incompatible with their network (and partner network) and I'd like to understand why.
For example the Oneplus 5 supports all their+partner frequencies but it still can't grab the network (2G/3G and 4G).
There is a trick using a hidden setting in Android which is "LTE only". In that case, we can connect to the Internet.
1. We can't receive calls and can't call if the 4G isn't available because it happens via their "Rakuten Link" app (kinda VOIP).
2. The quality is awful, I receive a new complain of "echo" in the voice at each call.
Could you help me to understand what's the technological reason behind that?
If it isn't the frequencies, what can it be? I've searched everywhere, they never say the reason behind that incompatibility.
Thanks!
Dunno if you're still watching this thread but here's been my experience with Rakuten Mobile:
I have a rooted OP5T. Didn't work out of the box even after putting in the APN settings.
Did some digging around on Japanese blogs and enabling VoLTE does get me connected to the network. You can make calls over the network or use their Link app to use wifi/data instead. Both worked fine in the limited testing I've done. Data was also fine and pretty quick. This worked well for at least a few months.
However, some months later, the fixes and patches I have applied to get VoLTE enabled on my phone doesn't seem to stick or something is resetting it. If I stay home, my connection will stay on indefinitely, however if I go outside, after a few minutes my signal will drop and stay off until I reflash the fixes, or now it seems to reconnect if I reboot the phone. I am starting to think switching cell towers might be doing something? I have more testing to do.