Samsung Verizon S4 SCH-I545, OS 5.0.1, on Tmobile network, very sporadic signal - T-Mobile Samsung Galaxy S 4

Bought a refurb SCH-I545 Verizon to run on Tmobile network. Created a new APN and have things working but signal is rather poor. Seems to hunt around a LOT from no signal to full signal and data 2G to 4GLTE. Not consistent at all. Many calls being missed and sometimes trying to call out, I have no signal. Tmobile is out of ideas. I think I have most settings right but something is either wrong with the phone or a setting is off.
Can anyone confirm?
I am considering rooting the phone to delete all the bloatware? I am not sure if the boot loader will be opened? I would not mind losing the Verizon boot screen and the "sim is not verizon" BS....
At first, tmobile thought the phone did not support 1,9ghz but all documents I can find say it is fully supported. Do I need some radio apps?

Related

[Rogers] Not allowed by SIM

My original thread has not been moved from the old forum, so I'm just going to link it here:
http://forum.xda-developers.com/showthread.php?t=1757711&highlight=not+allowed+by+sim
Anyway, someone on HoFo posted that if you change your APN to non-LTE, the problem goes away. I did that yesterday and so far I haven't seen the error. However, my coworker did the same thing on his S3 and still got the error. This issue is specific to Rogers network, as other people used their unlocked Rogers S3 on other carriers and did not see the error, but once they put in Rogers SIM back in, it was back. I wish Rogers would get off their ass and fix it!
This happens also on Telus. Not sure if I've done this APN trick, but I have HSPA locked and the modem locked on 850mHz through the service menu *#2263#, and I still get this error sometimes.
a quick flight mode toggle always fixes it.
dektoud said:
a quick flight mode toggle always fixes it.
Click to expand...
Click to collapse
Yeah, same here. It's just annoying when you're in a hurry and need to make an urgent phone call.
Not sure if this helps but I sell cell phones and a memo was released by rogers stating its a error in the firmware and that when rogers reception drops or its out of range it will say this, instead of showing no signal. Its states rogers and samsung are working on a fix for it. Its probably more noticeable on the rogers network than others because they are currently working on expanding there network in most of Canada therefore its probably causing signal drops every now and then.
Sent from my SGH-I747M using xda app-developers app
still having this issue after OTA update
TELUS
Sorry to resurrect an old thread but I purchased an unlocked S3 about 3 weeks ago and I just got this error today. I was not able to make any phone calls until I used the flight mode trick. I thought this problem had been fixed? I'm with fido so it's part of the Rogers family.
Does anyone else still experience this issue?
haven't had this error since the last time i posted which was September
although i find it more often that my phone would lose reception in places or situations where before i would have reception, but just SIM error.
so my guess is that the phone hasn't yet reconnected to the network after losing reception (from underground parking etc) and before it was "showing" reception when it had none and came back with SIM error. now it just flats out says what's going on, which is no reception.

Unlocked HTC 10 issues with T-Mobile

I've just done a bit of traveling with my carrier unlocked HTC 10 on T-Mobile's network, and I've encountered quite a lot of reception issues with this device. I'm not sure what the issue is, but am curious about others experiences road tripping with this device.
Previously I've only used the phone in my home area (Chicago). The device has performed flawlessly there. This past week, however, I road tripped to Maine and back and had a lot of problems with coverage. I'm fairly new to T-Mobile, so I would normally write it off as their network, but my wife's iPhone 6s performed great in these areas, as did my Moto X Pure Edition.
Here are some of the issues I experienced:
In rural Maine, while the phone was roaming on AT&T, many incoming calls and texts would not come through at all. This behavior was intermittent, despite having 3+ bars of AT&T signal.
While the phone was roaming on AT&T, many outgoing texts would fail to send. Rebooting the phone was often the only way to get them to go through. Again, this was with strong AT&T signal.
Moving between AT&T and T-Mobile coverage areas in rural Maine, the phone would fail to reconnect to T-Mobile service on its own. In order to make this work, I would either have to reboot the phone, toggle airplane mode, manually select T-Mobile under Mobile network settings -> GSM/UMTS Options -> Network operators or, if those all failed, run the LTE Discovery app. I'm not sure why that would make the phone reconnect to T-Mobile service, but it seemed to do so consistently.
The phone would lose signal completly in areas where our iPhone 6s and Moto X Pure Edition had LTE signal
The phone would lose LTE signal and move to 2G/EDGE or no mobile data at all in areas where our iPhone 6s and Moto X had LTE signal
I've seen similar issues discussed over in http://forum.xda-developers.com/htc-10/help/awful-lte-signal-update-t3378163, but it seems I'm experiencing more than just weak LTE signal.
Has anybody else experienced anything similar? Or am I having some sort of hardware issue? It seems crazy to me that this device would perform so poorly compared to the iPhone 6s and Moto X Pure Edition, both of which are also carrier unlocked. HTC told me I should try a new SIM, otherwise there might be a hardware issue, but I'm wondering if this is more widespread than just my device.
Haven't had any issues with mine
Sent from my HTC 10 using Tapatalk
I live in Maine and haven't encountered any issues yet. Although I do live in So Maine so T-Mobile is pretty solid here. I would try the new SIM to see if that fixes the problem.
Are you s-off and unlocked? If so which firmware version are you on? The US Unlocked version or something else? If you're not on the US unlocked firmware I would try flashing that, if you're S-Off. If that fails to fix it then I'd suspect a hardware issue.
BladeRunner said:
I live in Maine and haven't encountered any issues yet. Although I do live in So Maine so T-Mobile is pretty solid here. I would try the new SIM to see if that fixes the problem.
Are you s-off and unlocked? If so which firmware version are you on? The US Unlocked version or something else? If you're not on the US unlocked firmware I would try flashing that, if you're S-Off. If that fails to fix it then I'd suspect a hardware issue.
Click to expand...
Click to collapse
I'm on the US Unlocked version--not sure if it's s-off, I haven't done anything to it myself, so I'm using it however it came from HTC. Not sure if they are s-off by default or not.
Unfortunately I won't be back to Maine to test this new SIM this year. I guess I'll have to test locally side by side with my wife's iPhone to try to determine if it's still dropping coverage so regularly once I get out of a metro area.
I have a T-Mobile model that is running unlocked firmware and I experience switching problems when moving from wifi to lte. Simply put, I cannot connect to T-Mobile after leaving wifi unless I reboot the phone.
3's&7's said:
I have a T-Mobile model that is running unlocked firmware and I experience switching problems when moving from wifi to lte. Simply put, I cannot connect to T-Mobile after leaving wifi unless I reboot the phone.
Click to expand...
Click to collapse
Do you use the LTE Discovery app? I wonder if that would work for you too, running though that process once usually made my phone pick T-Mobile signal back up.
Trooper Thorn said:
Do you use the LTE Discovery app? I wonder if that would work for you too, running though that process once usually made my phone pick T-Mobile signal back up.
Click to expand...
Click to collapse
I have in the past on other phones and I will try here
same problem
I had a same experience where my phone roamed onto AT&T network and it would not come back to T-mobile network. This happened when traveling from Michigan to Columbus OH and Michigan to West Virginia.
Both of the time, only way to fix was go to advanced setting and choose carrier or reboot phone.

LTE Connectivity issues

I have a note 4 from att running 6.0.1. Recently the Internet (mobile not WiFi) would start cutting out and completely losing service for no reason every 5 minutes or so. Very agitating if I'm trying to watch a video or do anything on the internet, really. Anyways, I am using Cricket Wireless, which is a subsidiary of ATT. I tried out an ATT sim card as well and the issue is still present. I factory reset my phone and it's still doing it. However, if I ender the developers code into the dialer and brought up mobile network information, I could set the phone to use GSM/CDMA only (no LTE) and the issue went away completely. But now, I have much slower speeds than if I were to be using LTE which kinda sucks. Does anyone know a way to fix this?

AT&T tech support said my OP7T not LTE Compatible

It's HD1907 T-MOBILE. What I need is HD1905. He sent me the wrong one.
I only realized a few hours ago I had no mobile data. I had got calls and texts to work this morning.
After spending 45 minutes on the phone with AT&T they concluded my phone is not recognized as LTE compatible. WTF? It's not even connecting to 3g.lb
I've been buying unlocked phones for years. My last phone was OP5T. I've never experienced anything like this.
I'll probably take it to the corporate store tomorrow but doubt it'll help. Has anyone had problems with AT&T and this phone?
I'm just putting it out there, hoping somebody has an idea...
AT&T worked for me, excellent data speeds, and great signal. But at times it would go from 4 bars to absolutely no signal or data, and lots of dropped calls. After that I went to Verizon, not as good of signal, slower data, but no dropped phone calls or mysterious total loss of signal in an area where it should have been 4 bars.
Droid_Nut said:
AT&T worked for me, excellent data speeds, and great signal. But at times it would go from 4 bars to absolutely no signal or data, and lots of dropped calls. After that I went to Verizon, not as good of signal, slower data, but no dropped phone calls or mysterious total loss of signal in an area where it should have been 4 bars.
Click to expand...
Click to collapse
I'll bet if you look in the settings your model is HD1905 or the global model, not sure the number.
Actually if you could take a look for me and post back here that'd be good. It most likely won't make a difference but I'm curious.
KLit75 said:
I'll bet if you look in the settings your model is HD1905 or the global model, not sure the number.
Actually if you could take a look for me and post back here that'd be good. It most likely won't make a difference but I'm curious.
Click to expand...
Click to collapse
Yes I have the HD1905, but you can totally forget about vowifi with any provider except for T-Mobile. I tried them all, I even had a tech from VZW work diligently to try and get vowifi working. I told him to try and add my IMEI to the approved list, and that did not work either. As far as AT&T, they did not give me the time of day, they just told me I needed and AT&T device, period.
Droid_Nut said:
Yes I have the HD1905, but you can totally forget about vowifi with any provider except for T-Mobile. I tried them all, I even had a tech from VZW work diligently to try and get vowifi working. I told him to try and add my IMEI to the approved list, and that did not work either. As far as AT&T, they did not give me the time of day, they just told me I needed and AT&T device, period.
Click to expand...
Click to collapse
You mean Verizon when you say VZW?
I'm just confused as to how he would be able to add it to the list of approved devices.
Anyway it's BS. If the carrier supports the phone, and the phone is capable of VOLT!/WIFI CALLING, it should work.
KLit75 said:
You mean Verizon when you say VZW?
I'm just confused as to how he would be able to add it to the list of approved devices.
Anyway it's BS. If the carrier supports the phone, and the phone is capable of VOLT!/WIFI CALLING, it should work.
Click to expand...
Click to collapse
Yes Verizon. I have heard hear many times on this site, that phones are blocked from wifi calling by the IMEI, I or they could be wrong.
Vowifi works on the unlocked Pixel, but are they going to butt heads with Google? Volte works fine, I got a network extender, and I can use google voice to make calls over wifi if I really need to.
If vowifi is a must, get an approved phone, that is all you can do.
Droid_Nut said:
AT&T worked for me, excellent data speeds, and great signal. But at times it would go from 4 bars to absolutely no signal or data, and lots of dropped calls. After that I went to Verizon, not as good of signal, slower data, but no dropped phone calls or mysterious total loss of signal in an area where it should have been 4 bars.
Click to expand...
Click to collapse
I worked at AT&T until a few months ago. I can tell you confidently that their tech support is a bunch of dummies. Employees have their own tech support line to call and that one is just as bad. They would routinely tell customers they needed to go to a store to have something done. Then they'd get to the store to find out we literally cannot do that at the store. Stuff like that was super common. One of them even bet me $1,000 that iPhones DON'T reboot when they update, which we all know is all the way wrong.
I halfway think support tells people that stuff on purpose to try to get them to buy something from AT&T. God, I could rant about that place for hours lol
redemptionx11 said:
I worked at AT&T until a few months ago. I can tell you confidently that their tech support is a bunch of dummies. Employees have their own tech support line to call and that one is just as bad. They would routinely tell customers they needed to go to a store to have something done. Then they'd get to the store to find out we literally cannot do that at the store. Stuff like that was super common. One of them even bet me $1,000 that iPhones DON'T reboot when they update, which we all know is all the way wrong.
I halfway think support tells people that stuff on purpose to try to get them to buy something from AT&T. God, I could rant about that place for hours lol
Click to expand...
Click to collapse
Maybe you can answer this for me. Just because a T-MOBILE locked phone is able to make calls and texts on AT&T, does that automatically mean it should be able to connect to mobile data?
I was able to get it to make calls after a refresh signal was sent out, but it could not connect to mobile data . My sim is fine. I even popped it my son's Pixel 3a and LTE started immediately.
The seller is saying the fact that it was able to make calls means it is able to connect to mobile data. And I should take it to AT&T before returning it. I don't think he's scamming. He says he has the same phone on AT&T. And he's sold Hundreds of them. That kinda checks out based on reviews and some of those people do report it works with AT&T.
These phones are hd1907 T-Mobile but supposedly OnePlus unlocks them before sending them out to some sellers. I sort of believe the guy but is it true? If it were locked to T-Mobile could I get it to make phone calls?
Obviously I'm not talking about a hack. Because I thought locked was locked. Is it possible for a locked T-Mobile phone to make calls on the AT&T network?
Also I got AT&T to make it work but once I removed the sim/reinsert it, the thing displays weird behavior. Wifi goes in and out. It forgets the apn settings that were set prior.
redemptionx11 said:
I worked at AT&T until a few months ago. I can tell you confidently that their tech support is a bunch of dummies. Employees have their own tech support line to call and that one is just as bad. They would routinely tell customers they needed to go to a store to have something done. Then they'd get to the store to find out we literally cannot do that at the store. Stuff like that was super common. One of them even bet me $1,000 that iPhones DON'T reboot when they update, which we all know is all the way wrong.
I halfway think support tells people that stuff on purpose to try to get them to buy something from AT&T. God, I could rant about that place for hours lol
Click to expand...
Click to collapse
I agree, ATT was the most horrible experience I ever had. Tracfone may have even had a better customer support.
Verizon CDMA service may be antiquated, but their customer service and tech support is 2nd to none.
KLit75 said:
Maybe you can answer this for me. Just because a T-MOBILE locked phone is able to make calls and texts on AT&T, does that automatically mean it should be able to connect to mobile data?
I was able to get it to make calls after a refresh signal was sent out, but it could not connect to mobile data . My sim is fine. I even popped it my son's Pixel 3a and LTE started immediately.
The seller is saying the fact that it was able to make calls means it is able to connect to mobile data. And I should take it to AT&T before returning it. I don't think he's scamming. He says he has the same phone on AT&T. And he's sold Hundreds of them. That kinda checks out based on reviews and some of those people do report it works with AT&T.
These phones are hd1907 T-Mobile but supposedly OnePlus unlocks them before sending them out to some sellers. I sort of believe the guy but is it true? If it were locked to T-Mobile could I get it to make phone calls?
Obviously I'm not talking about a hack. Because I thought locked was locked. Is it possible for a locked T-Mobile phone to make calls on the AT&T network?
Also I got AT&T to make it work but once I removed the sim/reinsert it, the thing displays weird behavior. Wifi goes in and out. It forgets the apn settings that were set prior.
Click to expand...
Click to collapse
It should have no trouble using data BUT you'll have to change the phone's APN settings to match your carrier before you can. You can google it and find them. It's not hard at all to change. Somewhere under the "network" settings.
Someone correct me if I'm wrong, but as I've understood it the phone will keep trying to access the previous carrier's data network, which is why you didn't have data. But as said above the APN settings should fix that.
redemptionx11 said:
It should have no trouble using data BUT you'll have to change the phone's APN settings to match your carrier before you can. You can google it and find them. It's not hard at all to change. Somewhere under the "network" settings.
Someone correct me if I'm wrong, but as I've understood it the phone will keep trying to access the previous carrier's data network, which is why you didn't have data. But as said above the APN settings should fix that.
Click to expand...
Click to collapse
If I told you the whole story, which started on Friday morning and in the end involved 7 AT&T employees, 6 on the phone and 1 in the store, it'd probably be removed because it's spam. Too long of a story.
But in the end it didn't get to connect to mobile data..at least not consistently. I took it to the store. The guy removed the Sim reset it, turned it off and boom! - LTE, calls and texts. His theory was it takes a little while for it to unlock and get set so when I tried it the other night it wasn't working.
I was happy because it literally took 5 minutes. I ran some errands and was out for like another 2 hours. Everything was working. Some point between the store and my driveway, the signal was gone. I never got it back. Of course I tried reset, remove Sim, reboot, change apn settings.
I called AT&T... the first woman didn't even know what CDMA and GSM was. I politely got her to transfer me to the guy who 'knows his stuff'. He got it to make calls again, but in the end concluded this device can't work on this network. I didn't wanna argue anymore. He had a BS answer for everything including 'If it doesn't work, why DID it work just a half hour ago?'
He said I could try getting a new sim. They have no idea. My son's sim won't work on this phone but pop it in my old phone and it works. And my sim works in his phone. It's not the sim. I know it.
KLit75 said:
It's HD1907 T-MOBILE. What I need is HD1905. He sent me the wrong one.
I only realized a few hours ago I had no mobile data. I had got calls and texts to work this morning.
After spending 45 minutes on the phone with AT&T they concluded my phone is not recognized as LTE compatible. WTF? It's not even connecting to 3g.lb
I've been buying unlocked phones for years. My last phone was OP5T. I've never experienced anything like this.
I'll probably take it to the corporate store tomorrow but doubt it'll help. Has anyone had problems with AT&T and this phone?
I'm just putting it out there, hoping somebody has an idea...
Click to expand...
Click to collapse
That's strange as they both litterly have the same bands besides 71 that 1907 has
This is att bands and oneplus bands
If u haven't tryed I would recommend using the failed to go to your settings and toggle around there all bit make sure it's set for north america
rob420p said:
That's strange as they both litterly have the same bands besides 71 that 1907 has
Click to expand...
Click to collapse
I took it back to AT&T yesterday. There was someone in front of me so I sat down, removed the sim from my working phone, popped it in the op7t... instant lte, calls & texts. The same thing happened the day before I went to at&t. It worked perfectly well there in the store and even 2 towns away but not m my neighborhood which DOES connect to LTE, has for years on every phone we've had.
The tech (if you can really call him that) updated the sim. That got it done. I've had a working phone for 24 hours. BUT no LTE. It only connects to H+.
I haven't had time to call or go back to the store, but I'm hoping it's an easy fix. This has been the weirdest week I've ever had dealing with a phone. I've learned that AT&T doesn't know what they're doing. I still can't believe I needed to explain what GSM and CDMA was to one of the people on the call.
I'm gonna try a few things tonight after work.
KLit75 said:
I took it back to AT&T yesterday. There was someone in front of me so I sat down, removed the sim from my working phone, popped it in the op7t... instant lte, calls & texts. The same thing happened the day before I went to at&t. It worked perfectly well there in the store and even 2 towns away but not m my neighborhood which DOES connect to LTE, has for years on every phone we've had.
The tech (if you can really call him that) updated the sim. That got it done. I've had a working phone for 24 hours. BUT no LTE. It only connects to H+.
I haven't had time to call or go back to the store, but I'm hoping it's an easy fix. This has been the weirdest week I've ever had dealing with a phone. I've learned that AT&T doesn't know what they're doing. I still can't believe I needed to explain what GSM and CDMA was to one of the people on the call.
I'm gonna try a few things tonight after work.
Click to expand...
Click to collapse
That is strange and pethetic the att peaple.dont know what they are doing.if I have time later I'll try to research she if anything comes out
rob420p said:
This is att bands and oneplus bands
Click to expand...
Click to collapse
Thanks for sharing, but I've never really needed to mess around with the settings as far as mobile data goes. It either works out of the box, or at most I'll need to put the apn in manually on some custom roms, but even that's rare.
How does the info you provided apply to my problem. I know the phone can connect to lte. It was connecting briefly on Monday afternoon and while I was at At&T yesterday, it connected before they updated the sim.
Is there something I can do with this? It's a sincere question. I'm not sure if I can apply it somehow. Thanks
KLit75 said:
Thanks for sharing, but I've never really needed to mess around with the settings as far as mobile data goes. It either works out of the box, or at most I'll need to put the apn in manually on some custom roms, but even that's rare.
How does the info you provided apply to my problem. I know the phone can connect to lte. It was connecting briefly on Monday afternoon and while I was at At&T yesterday, it connected before they updated the sim.
Is there something I can do with this? It's a sincere question. I'm not sure if I can apply it somehow. Thanks
Click to expand...
Click to collapse
I think his point was to show that the OP7T does in fact work on all AT&T bands. Normally you don't need to do anything with this if the SIM is provisioned correctly.
What are the chances that you are on the edge of the local AT&T LTE signal so it drops to H+ because that's a stronger connection? At the AT&T store the LTE signal is stronger so the phone is favoring that one. Some phones are more sensitive to signals than others (or more aggressive at switching to a stronger band).
Try using a program like "LTE Discovery" and see what bands you actually are connecting to. It can also let you know what is going on in your area with tower location.
Lost Dog said:
I think his point was to show that the OP7T does in fact work on all AT&T bands. Normally you don't need to do anything with this if the SIM is provisioned correctly.
What are the chances that you are on the edge of the local AT&T LTE signal so it drops to H+ because that's a stronger connection? At the AT&T store the LTE signal is stronger so the phone is favoring that one. Some phones are more sensitive to signals than others (or more aggressive at switching to a stronger band).
Try using a program like "LTE Discovery" and see what bands you actually are connecting to. It can also let you know what is going on in your area with tower location.
Click to expand...
Click to collapse
I'll try that. Thanks.
That's what I said but the guy at the store said it's really not a stronger signal at the store. Plus I know I can get LTE at my house and in the store because all our other phones connect, even this one, briefly at the at&t store.
The seller have me a code to input into the dialer but I'm waiting for tomorrow to put it in. It's my day off. If something goes wrong it won't be a huge deal. I will look into what you sent at some point though.
Droid_Nut said:
Yes I have the HD1905, but you can totally forget about vowifi with any provider except for T-Mobile. I tried them all, I even had a tech from VZW work diligently to try and get vowifi working. I told him to try and add my IMEI to the approved list, and that did not work either. As far as AT&T, they did not give me the time of day, they just told me I needed and AT&T device, period.
Click to expand...
Click to collapse
Your posts are bouncing between VoLTE & VoWiFi.
LTE bands and VoLTE work fine on Verizon's network.
Verizon allows VoWiFi on the OP 8's that they sell. They will not activate VoWiFi on the OP 7 series, the claim is that the phone did not go through their security testing. IIRC VZW doesn't allow VoWiFi on any outside phone.

N920I - Weak 4G. Can no longer make or recieve calls. Possibly a local 3G tower was turned off.

My Galaxy Note 5 SM-N920I purchased December of 2015 can no longer make or receieve calls. My provider is TracFone via the Bring Your Own Phone program. I use their SIM card and it has worked all this time. Until recently the phones features have stopped working. I think they have been disabling the 3G in my area, as everyone is converting to 4G now.
Note 5 is supposed to support 4G but it's definitely been having issues. Text and internet still works. however texts are sometimes delayed on occasion, not always, usually it's fine. Data speed just now was tested at 10 mbps down, 3 mbps up. Signal bars are consistently low, regardless of physical location; inside, outside, other side of town, SIM status shows signal always between -108dBm and -118dBm. This is likely why I cannot make or receive calls, but the question is, why is this happening?
Like I said, I suspect they are shutting down 3G in this area, so the best theory I've been able to come up with is this: perhaps 4G has always sucked on this phone but I never noticed because it would fall back to the good 3G connection. Now that 3G is gone in this area, all I have to use is 4G which is a shoddy connection.
Further research has found in the early days of this phone there were numerous reports of weak/no signal. See these threads:
Fed Up With Terrible Reception
Hey all, I'm kind of venting here and at the same time hoping for some sort of direction because I'm absolutely fed up with my S6. I upgraded roughly a month and a half ago from an S4. My phone usage was below normal for the first week or two as I was busy with a variety of projects. As my...
forums.androidcentral.com
No signal/network on my note 5
Hi everyone, so I just got this note 5 N920P last two weeks but I noticed its OS was lollipop...waited for updates for 7.0 but nothing so I went ahead and downloaded Odin with latest firmware from samobile and did it my self, now here the problems start to show first of all this hands free...
forums.androidcentral.com
One theory was that the 4G antenna they used in the Note 5 / S6 was of poor design. Causing weak signal.
Things I have tried and did not work:
-Contacted TracFone. They confirmed the device is supported and provisioned correctly. They recommended a new SIM card.
-Replaced the SIM card with a brand new one
-Factory reset the device. It's running the stock Android 7.0 Nougat which was the last up to date version available.
-Tinkered with various service menus including *#2263# and *#0011#. Messing about with the LTE band settings didn't change the signal strength ever. Regardless of the LTE band, it stays in that -108 to -118 range, too weak for calling.
What can be done to fix this? Possible ideas:
-Internal antenna replacement, but this seems either expensive to have someone do, or extremely difficult to do oneself. Would it even make a difference? Has anyone tried this?
-Software. Could the issue have been introduced during one of the software updates? Planned obsolescence perhaps? Could we revert to an earlier firmware to potentially resolve this? has anyone tried this?
-Firmware. Could we upgrade the firmware to a later, unsupported version safely? Perhaps the issue was fixd in later Android versions but has not been adressed in older devices that are no longer updated.
I'm the kind of person who likes to use my things until they absolutely die. This Note 5 has been perfectly fine until recently. There is nothing wrong with it. It's still modern, fast, and has a great camera. I would HATE to have to replace a phone for such a stupid reason. Not only is money tight, but it's such a waste when this thing is still perfect apart from this weak 4G signal.
Has anyone else had this issue? Have you resolved it? Any help appreciated. Thank you.
Try a network reset.
Clear sim toolkit data.
Clear system cache.
The access point profile may need updating or maybe the sim?
Contact AT&T advanced tech support.

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