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4G lit up but no internet?

So inside my apartment I can make calls, but no internet. There's definitely some static and the person on a land line on the other end said every now and then the call wasn't clear. Literally outside my apartment I get 25Mbps 4G LTE speeds. Weird. I guess my apartment is super insulated? LOL no, it's California the walls are paper thin. What gives?
My wife's iPhone on AT&T works fine inside apparently. My EVO on Sprint works really well.
I don't know if there's any special setting or number to dial to acquire different radio towers...I don't know. But here's the most troubling of all. Why does my 4G (and sometimes 4G LTE) icon light up when I don't have internet?
It tries to connect and all but it's spotty and just fails. I literally can't use internet inside my apartment unless it's on WiFi of course...Yet my wife's iPhone on AT&T can and so can my EVO on Sprint.
I will be testing all around my neighborhood and the San Francisco area...But I keep on Sprint for not having LTE...But if I can't even use the damn phone on AT&T consistently I guess slower speed is better than no speed.
Anyone else with this issue? I'm curious since it's a new phone, new radio, etc. Is it known to have issues indoors?

this sounds similar to some of the problems others are pointing out in all those threads complaining about wi-fi. various fixes being offered. also at least one person had said htc is aware of the problem and claiming there will be a fix by the end of may. you may want to check the other threads.

Mobile data on in settings??
Sent from my HTC One X using xda premium

Yes it's on. It's just really bad inside my apartment and even on my porch (bad as in doesn't work and I have to use WiFi)...I thought maybe some sort of dead zone but again my wife gets signal with her iPhone. I hope it is something that gets fixed. If I can get this amazing 4G in my apt as well as down the block, I'll be a very happy camper.
If I can't use my phone in my apt ill be uh well I might be going back to sprint
Sent from my HTC One X using XDA

tom_m said:
Yes it's on. It's just really bad inside my apartment and even on my porch (bad as in doesn't work and I have to use WiFi)...I thought maybe some sort of dead zone but again my wife gets signal with her iPhone. I hope it is something that gets fixed. If I can get this amazing 4G in my apt as well as down the block, I'll be a very happy camper.
If I can't use my phone in my apt ill be uh well I might be going back to sprint
Sent from my HTC One X using XDA
Click to expand...
Click to collapse
call att and see whats up. Something isnt right.
I was with sprint, good thing i left. I have used more data in 2-3 days than i did with sprint in a month. Lol

Yea I would call AT&T. I think your phone may have a bad 4G chip. I had to send a phone back for every 4G issue in the book.
I just wish AT&T LTE was 25+mbs were I live.

I'm on 4G now inside. I didn't move the phone at all. It was on WiFi and after turning it off on then off a few times the 4G picked up. I see it now as HSPA+ and sometimes it bounces to LTE. But it seems to be working...at least long enough to post this message which is an improvement...
Sent from my HTC One X using XDA

Walked around ny apt. Into the room I had no signal in before for sure... Seems ok. Bars dropped to one but now back in bed I have 3.
Also tested GPS directions today for fun and every few blocks it would lose GPS signal.
Never had such issues on Sprint and I'm not in the boonies...I'm in silicon valley of all places lol.
I don't know...how can you test for bad 4G chip? How can you test signal strength and what do I tell AT&T and what can they do for me? Or will they just say I'm unfortunately in a bad area?
Sent from my HTC One X using XDA

just a comment. i have not had your problem, but i've been following these threads wondering if the problem will eventually turn up for me. i've placed the widgets for mobile and wifi on one of my screens so i can access these easily. turning on mobile while wifi is on does not appear to overrride wifi, but turning wifi on while mobile is on appears to override mobile, as the 3g/h signal for at&t disappears. i'm doing this from home, so i don't know if it works the same way upon leaving home, but maybe... i should also add that i'm on an int'l one x using at&t prepaid.

Played with it some more. Here's how it works. When on WiFi it uses WiFi like it should and doesn't use 4G/mobile network.
The icon for 4G is lit. However, I looked under settings this time more carefully. It says disconnected underneath. If I turn off WiFi it attempts to connect to mobile network but fails. Endless loop.
I turned off everything. Turned on airplane mode. Turned off airplane mode (black box notification pops up with "preparing SIM card" and goes away). The mobile network connects now.
Right now my signal icon seems to switch back and forth from no bars with an X to 2 with 4G and LTE lit. I can't post this message when there are zero bars, so the icon I guess is now accurate. I'm not moving, I don't know why reception would be bad or off/on....can any other electronics cause well known interference?
But at least I could connect. I'm not sure if it was luck or if turning on airplane mode made it easier to reset itself.
Sent from my HTC One X using XDA

I know my speekers at home seem to cause some interference, but the phone win's so then all you hear is a crap load of buzzing.
How I would test for this is to go to a AT&T store and do a "vs" on # bars/holding bars and the DBM rating under "about phone">"status".
If they are both the same then you may need to call AT&T about this. (I hope you don't have to call them 10 times like I did with the big red.)

Tried turning off my speakers here...Still bad. I mean the speedtest won't even complete. I'm stuck on the upload, the download was .74Mbps... 185ms ping. The signal isn't consistent. It says LTE then it goes away. I'm just bouncing around between HSPA, LTE, and nothing at all. Despite the phone not moving...This thing just can't stop hunting for a network.
Under the battery use, clicking on the graph expands it and shows the "mobile network signal" and the bar is 90% or more all yellow and some gaps of nothing even. Some slivers of red.
EVERYTHING else about the phone is amazing...It's just behaving as if I was in the middle of no where or something, but I'm in a small city.
I now know why my friend is ditching AT&T for Sprint I guess...But I'm screwed there too, no LTE and ugly phone design. It's like the HTC One is just some giant tease. A mythical Unicorn. Magic dragon. I just keep chasing it, but I don't think I'm ever gonna catch it

sprint is going to have its version of the one x - the updated evo, i believe, due out this month.
but you should just take your phone back to at&t. others have done so and gotten replacements.

So does it act like this:https://www.youtube.com/watch?v=rDxJoGv3FLA&feature=channel&list=UL
If so, you likely have a bad phone.

so it's a thing? like i can just roll in and be like "i think this phone is broken..." and i'll get a new one? and it's common?
okie dokie. i'll go do it tomorrow.
my internet is kinda like that video. slow and connection is lost.
BUT i have seen it really fast on the speedtest.net app.
on a side note, i did a factory reset and since (just about an hour now) i have not yet seen the constant connect/disconnect issues that i did before.
so it's pretty slow inside my apartment but it's at least consistent. outside it was fast on the LTE. 15Mbps down on the speedtest.net app. again the connection did not drop.
so i can deal with a little slow inside... in the bathroom the densest part of my apartment it was down to 1 bar but still, the mobile network was connected and despite it taking foooooreever to download an app, the play store at least did not fail on the download.
so better, but not perfect.
trying the speed test right now, it failed. thing says 4g lte up top too...why it would fail when the thing says it has signal, i just don't know.
can a phone be broken in this manner? intermittently work? i would say then at that rate its the area. bad signal in the area. ...and if i went into the store and said i want a new phone, i feel as if though they would just say it's the area you're in and the phone is fine... but how is it bad signal when it says LTE on there? and when every other device (a phone on Sprint and my wife's iPad and iPhone on AT&T) work fine? i can't imagine it's a bad area or apt. insulation. but how can the phone be bad if it works "some" of the time?
anyway. i guess i'll go see if i can trade it in.

Mobile network turning on and disconnected with 3 bars 4G LTE
I experienced the same problem after using HTC One X for the first day. I was able to get almost 30 M download and 26 M upload in my house on May 6th but lost the connection to mobile network on May 7th at the same location. When I turn off Wi-Fi, phone tried to connect to mobile network but went into the loop of turning on,disconnect while mobile network button is on. I went through 3 AT&T tech service even got a new sim and did factory reset but the problem just won't go away. The last AT&T tech service told me it is a defected device which I really don't agree. I think it is more an issue with HTC One X working with AT&T 4G LTE. I hope HTC & AT&T can solve this problem soon.

[Q] Why does my AT&T HOX keep switching to EDGE?

I've noticed this only at night time when I'm at home. My phone will be on Edge instead of 4G. Data is fine because I'm on wifi but if I turn wifi off, I will have no data and it will not connect to 4G.
I live in an area without 4G LTE, but we do have HSPA+. I have a few iPhones in my house also and they are not, nor have they ever, switched to Edge in this area. So why does HOX keep doing it? Is there something I need to do like turn of LTE or something?

relic120 said:
I've noticed this only at night time when I'm at home. My phone will be on Edge instead of 4G. Data is fine because I'm on wifi but if I turn wifi off, I will have no data and it will not connect to 4G.
I live in an area without 4G LTE, but we do have HSPA+. I have a few iPhones in my house also and they are not, nor have they ever, switched to Edge in this area. So why does HOX keep doing it? Is there something I need to do like turn of LTE or something?
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Click to collapse
I have yet to see mine display anything but 4G, even when my signal is very low

I have run into the same problem as you, and likewise my iphone 4S never went to edge nor had a signal issue where I live. I think i'm going to take my phone back to AT&T and either ask for another phone or a refund. I really like this phone but having no signal at home is unacceptable.

Some of my "android" co-workers have said it may have something to do with the battery profile? Since we don't have root we can't check it but. But something about the phone is thinking "I don't use 4g at night" so it shuts it down to save battery... anyone?

My first HOX would never switch to "E", but always showed "4G", except when it would lose all bars and show a small X. I finally swapped it out yesterday for another one and the new one hasn't lost the signal completely yet, so I'm guessing there are a few bad HOX's out there with buggy radio firmware.
I'd keep swapping out units until you find one with stable cell reception. My new one finally switched to E today, but that's because I'm barricaded in a fortified complex with no cell penetration whatsoever. Seems to be working as expected.

mine does the same. I live in a low reception area and my 4s can hold on to the hspa signal while the one x goes between edge, no service, 4g. Love the phone but I need my phone to work at home.

Data dropping

My phone has dropped data randomly two times this morning. I could only get it back by doing a switch to airplane mode. Anyone else with this problem? Is this a phone issue that I need to get a new one?
Sent from my HTC One X

Mine has dropped several times. when coming to and from work. It seems to always happen when it connects to wifi. when i leave work and its wifi, i lose all signal entirely.

I don't use wifi though that's the thing. I called ATT and they said it may need a new simcard......which this was. So I swung by and got one and the lady at the store said that my phone may be going bad! LOL wow I love how they train their people.

YES. Most definitely, this is the same problem I'm experiencing. I had another thread posted about how the 4G icon was lit but there was no signal. The icon now seems to be a little more accurate...But still.
At home I switch on WiFi so I don't run up my data but if I look at the settings for mobile network the status underneath in gray text keeps showing that it connects and disconnects. Endlessly. The phone isn't moving. My wife has signal on her iPad and iPhone (I know those are 3G).
I have to turn on airplane mode and then off...Then mobile network on and it seems to help a little. However it's still super spotty.
This is pretty much only indoors but I don't know. I'm going to go around town and try it out. On their coverage map I'm in a big zone of LTE coverage. Outside I have seen 30Mbps on LTE using speedtest.net app. So I don't know. I thought it was very odd given the houses here in CA don't exactly have super thick insulation and every other cell phone (Sprint, my wife's on AT&T, etc.) seem to be AOK. It's just this new One X that just can't stay connected to the 4G.
Going under settings > about > network ...
I see my signal strength....some readings are...
-109 dBm 4 asu
-101 dBm 6 asu
-107 dBm 2 asu
I have no idea what values I should be seeing - what is considered good?
Mobile network type says HSPA. Service state says in service. Icon up top is 4G with one bar. If I turn off WiFi I could not load a web page or anything. That's what annoys me. I usually see like 2 bars and that's fine...But if I see the damn bars and the 4G icon....I sure as hell expect the data to work, even if a little slower.
It's just SUPER flaky. Again outside seems to help but to be honest I haven't sat and watched it. For all I know it could be connecting and disconnecting over and over outside as well but just have a stronger connection when it is actually "on."
I'm annoyed and speechless. I'm not in the boonies. I've never experienced anything like this before. I'm actually at my desk in front of a window. Uh...WTF?

Just picked up lunch and watched the data while on the trip.
This phone is unusable. It's gotta go back. Well, I guess it's welcome back Sprint. Sooooo disappointed.
All I got was HSPA. The only time I get LTE and those fast 30Mbps down is at night time. AT&T is such a joke and their network is NOT ready for this phone.
I'm in Palo Alto, CA. It's not the middle of no where. This is embarrassing. Either that or somehow I have a defective phone or SIM card or something I have no clue here...It's really really bad and I'm obviously not the only one.
3 days and it's been horrible, the only reason why I didn't notice sooner is because I've been using the phone on WiFi most the time.

tom_m said:
Just picked up lunch and watched the data while on the trip.
This phone is unusable. It's gotta go back. Well, I guess it's welcome back Sprint. Sooooo disappointed.
All I got was HSPA. The only time I get LTE and those fast 30Mbps down is at night time. AT&T is such a joke and their network is NOT ready for this phone.
I'm in Palo Alto, CA. It's not the middle of no where. This is embarrassing. Either that or somehow I have a defective phone or SIM card or something I have no clue here...It's really really bad and I'm obviously not the only one.
3 days and it's been horrible, the only reason why I didn't notice sooner is because I've been using the phone on WiFi most the time.
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Click to collapse
how fast is the HSPA you're getting?

1-3.56Mbps down and 0.04-1.03Mbps up.
Out on the street downtown.
Best I've ever had was at night on LTE 30Mbps down and like 17Mbps up.
All to the same test server. Trying servers several states away it varied, sometimes I'd even see 20Mbps down to a far away server.
Again this is all WHEN I'm actually connected to the data network.
The thing just can't hold a connection. Constantly dropped.
edit-- ok so right now same time of day, servers, etc. Sprint's 3G is a little slower, but at least I'm not getting dropped.
and on a side note, i got a REALLY helpful lvl1 tech support lady on the phone. much better experience than i thought. there was an issue in the area before. but basically i'm going to give it another shot. if no good tomorrow, swap for a new phone. they'll call me back friday and we'll see... crossing my fingers.

Any update on this? I've got a new One X and work night shifts twice a week. I've notived tonight that the data drops when the phone is idle and obviously nothing pushes.
There's got to be a way of turning this off. I can see why HTC would call it a feature, but there has to be a flag or a switch somewhere....

Is the radio in this device really that bad?

so long story short I am looking at ditching sprint where I have an EVO LTE. Trust me when I say I am used to crap reception and data speeds. I was reading the thread full of other people who have came from sprint and most seem happy but... I read a lot of comments from long time Verizon users saying things like " I have to contort like a monkey to get a message to go through". Are these just spoiled Verizon users that don't know how good they've got it? Or is coming from sprint a waste of my time? Thanks for any and all input.
PS: Verizon has LTE all over my area, sprint has not announced any LTE anywhere near me. Is the LTE utilized for voice and text? Will this help?
Sent from my EVO using xda premium

Im sure others have problems, but mine has been great. Not a single issue to speak of. Been running CM10 for 2 months now.

Gordon Ramsay said:
so long story short I am looking at ditching sprint where I have an EVO LTE. Trust me when I say I am used to crap reception and data speeds. I was reading the thread full of other people who have came from sprint and most seem happy but... I read a lot of comments from long time Verizon users saying things like " I have to contort like a monkey to get a message to go through". Are these just spoiled Verizon users that don't know how good they've got it? Or is coming from sprint a waste of my time? Thanks for any and all input.
PS: Verizon has LTE all over my area, sprint has not announced any LTE anywhere near me. Is the LTE utilized for voice and text? Will this help?
Sent from my EVO using xda premium
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Click to collapse
NO radio problems here.... I think a lot of people with problems may be on the border of having coverage where they are...? I have FULL bars no matter where I go in Michigan (except in Walmart) LOL I have LTE coverage too and it's been a solid performer and I may drop a call here and there but nothing out of the norm... Just my personal experiences...:good:

My .02
Go to a verizon store, put a rezound side by side to a samsung galaxy s3 and compare the dbm and asu and u will see how terrible the signal is . My phone is constantly at least 20 dbm less than the rezound .
It feels like i am back to sprint or tmobile since i got my device, constant data drops, phone call break ups and 4g/3g handing off is terrible .
Btw this is my 4th sim and second samsung galaxy s3 trial now , still reception in comparison to any htc phone is horrible.
Htc put their 4g antennas on the back cover which i think makes them practically immune to low signal issues.
Its a pretty phone , but if u want a device that actually communicates with satellites and cell towers, then get a real phone . not this one .
waiting for htc dlx

Mine has been completely fine.
Currently not being productive on my S3.

I came from Sprint at the beginning of the month. On Sprint it had gotten so bad that I was on 1 bar 90% of the time in the middle of the New Orleans area. I gave up waiting for it to get better and installed Roam Control so I could force it to roam on Verizon. Forced roaming only gets you 1x data, but it gave me full signal which prevented dropouts and draining the battery.
Now I'm on Verizon with the S3 and have no signal issues. I don't think I've ever seen less than 3 bars. The signal starts might be lower than other phones based on other people's experience but I wouldn't know because I haven't had any problems to make it worth checking. I think it really depends on your area. If your current phone is rooted, you could try Roam Control to get an idea of what the signal strength will be like, although you'll be stuck on 1x data.

I too was scared by the reports in various threads that these devices have horrible radios. We switched to Verizon from ATT because ATT doesn't work at all at my office (searching for reception).
I haven't been looking at dBM or anything but from a functional standpoint I haven't had any issues. There are some areas where before I was getting 4-5 3G bars on my ATT iPhone4 where the SGS3 bounces between 1-3 bars 4G LTE. It's always disturbing when you see 1 bar of reception, but the phone operates well even getting 4-5Mbps in speedtest. If you look at bars (I know not really accurate) and whether or not I can browse, call, etc. the SGS3 compares favorable to the wife's iPhone5. In fact there were a couple places where I was getting 1-2 bars 4G and the iPhone5 dropped to 3G.

Her are some screen shots of my signals after an update last night. These are the best I've gotten on both and better than anything I saw on my Rezound.
Currently not being productive on my S3.

Never had an issue with signal on my S3. You also need to realize that the most vocal people are those that have an issue. For every 1 person posting about an issue there a dozens that have no problem at all.

Signal on my s3 is great its 100 times better then gnex was and about on par with my old droid RAZR.

dwyw42 said:
I came from Sprint at the beginning of the month. On Sprint it had gotten so bad that I was on 1 bar 90% of the time in the middle of the New Orleans area. I gave up waiting for it to get better and installed Roam Control so I could force it to roam on Verizon. Forced roaming only gets you 1x data, but it gave me full signal which prevented dropouts and draining the battery.
Now I'm on Verizon with the S3 and have no signal issues. I don't think I've ever seen less than 3 bars. The signal starts might be lower than other phones based on other people's experience but I wouldn't know because I haven't had any problems to make it worth checking. I think it really depends on your area. If your current phone is rooted, you could try Roam Control to get an idea of what the signal strength will be like, although you'll be stuck on 1x data.
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Click to collapse
This doesn't work, each manufacturer measures it slightly differently. You have to use a third party app to compare phones that are not the same model.
Sent from my iPad using Tapatalk HD

Yes, it is. My GS3 consistently drops in places where my Rezound and iPhone work without a hiccup.

I actually just switched from Sprint to Verizon last week and love it. My gs3 has great reception and the network is very fast. I get a consistent 30 mbps down all over my area. With Sprint I was lucky to get 500 kbps
Sent from my SCH-I535 using xda premium

The Nexus was the worst for reception. The S3 is a close second. It seems to be people in some parts of the country don't notice the issue - possibly because they don't use their phone much or because they have towers that use different technology than the towers in the areas I travel. I spend a lot of time in Los Angeles, Vegas and Dallas. I can be at 4 bars one second and no bars (drop the call) and go back to 4 bars the next.
I was on Sprint and the HTC EVO 3D had that same issue even though the EVO didn't. I did always get crap data speeds on Sprint though. Some phones get great signal like the Motorola - so the question is - which is more imporant to you - the PDA or the phone. I use about 3000 minutes per month so I notice quickly when there are issues with a phones reception. My data speeds on the S3 are much better than I had on Sprint.

No the radios are not bad.
Excellent service, all the time here. In fact, I've never seen my phone with less than 3 bars, anywhere I go. And I travel a lot.

Yes the radios are very bad.....although improving. With the HE radio I finally have seem -99 dbm at my house although most of the time it is around -105. This is much improved compared to the original radio where I saw on average -110. I still drop calls in areas where I never have before. The poster that stated that HTC's have better signal are definitely correct. My wifes old rezound normally saw -80 to -85 at my house and never dropped calls anywhere. My old Thunderbolt was the same. Funny thing is that no matter what direction I go from my house, once I am a minute away I get full reception.....no matter what way I go. The radios don't do a good job of reaching out for the signal. The range is bad. Those stating that they are happy with their radios are probably in areas that don't have any weak spots. I'm holding out for newer radios cause every release seems to be a small step in the right direction.

ercDROID said:
Yes the radios are very bad.....although improving. With the HE radio I finally have seem -99 dbm at my house although most of the time it is around -105. This is much improved compared to the original radio where I saw on average -110. I still drop calls in areas where I never have before. The poster that stated that HTC's have better signal are definitely correct. My wifes old rezound normally saw -80 to -85 at my house and never dropped calls anywhere. My old Thunderbolt was the same. Funny thing is that no matter what direction I go from my house, once I am a minute away I get full reception.....no matter what way I go. The radios don't do a good job of reaching out for the signal. The range is bad. Those stating that they are happy with their radios are probably in areas that don't have any weak spots. I'm holding out for newer radios cause every release seems to be a small step in the right direction.
Click to expand...
Click to collapse
Same exact thing here! You took the words directly out of my mouth.
Sent by one of my many Anthromorphic Personifications

Here are the results of a real world test that I just did with a co-workers HTC Thunderbolt compared to my SG3:
Both phones on 4g and side by side
HTC dBM -66
SG3 dBM -92
I think the results are pretty clear. Nothing else really needs to be said about the quality of the SG3 radio......it is not as good as the competition. If it was close by a few dBM then it would not be of concern to me. A 26 dBM difference is huge!
Because of this difference in signal strength he was able to have much faster download speeds. I was 17 down compared to his 27 down.

Radio Performance

I am curious as to how the phones signal has been for those that own it. I currently have the S3 and have had it since launch but don't like how it gets stuck in 3g or 1x when losing 4g temporarily even though I know i'm back into a good 4g area. Overall signal is good but the transfer between 1x/3g back to 4g is terrible and my next phone i'm hoping to avoid all the frustration.
I have thought of buying the moto x just because its motorola and they're known for good radios. I have some time and am thinking of waiting until the moto x2 or g3 but its one of those things where why wait if it's good.
Thanks in advance.

zim2704 said:
I am curious as to how the phones signal has been for those that own it. I currently have the S3 and have had it since launch but don't like how it gets stuck in 3g or 1x when losing 4g temporarily even though I know i'm back into a good 4g area. Overall signal is good but the transfer between 1x/3g back to 4g is terrible and my next phone i'm hoping to avoid all the frustration.
I have thought of buying the moto x just because its motorola and they're known for good radios. I have some time and am thinking of waiting until the moto x2 or g3 but its one of those things where why wait if it's good.
Thanks in advance.
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Click to collapse
To be honest with you. Samsung has the worst radios. I had an s3 and it dropped signal too many times. I then got the HTC DNA and it was so much better. I believe HTC has a way better radio than Samsung.
My All New One

I was kind of concerned about this too before I bought mine. I come from a long list of Moto phones. The only non Moto phone I've had was a Rezound. I had it for all of one day. The darn thing would only ring probably 1 out of 4 calls I received. 1 out of 3 if I was lucky. I took it back the day after I bought it and they looked at it and told me there was nothing wrong with it. Well, I've never had a problem like that in my house with any Moto phone. So, I told them to keep it and went home with a Razr Maxx. You can see why I was concerned.
Anyway, I have to say, this phone has the best radio or at least the best reception of any phone I've owned. I work in an area that is quite iffy as far as a signal goes and my Moto phones would hold a pretty good signal there but depending on where I was at any given time, I would lose the signal and have to walk around a bit to get it back. In the shop there, forget it. I pretty much had nothing. The signal on this phone shows it's slightly weaker at work than my Maxx but it's worked flawlessly for me out there. I can even take it in the shop and it works great. Signal is weak but somehow it seems to hang onto it. Listened to Tune In Radio for 5 hours in there today and never lost the signal once.
I also went to a town today where it's worse than at work. My Moto phones there would work but constantly on and off. I was listening to Tune In there today too and it did have one hiccup for 10 seconds or so but that was it in a half hour's time. But, that doesn't surprise me in that location. What does surprise me is that it only stopped once. No way any of my Moto phones would do that well there. Anyway, maybe I'm just lucky but I'm extremely pleased with mine and don't regret buying it at all.

The old faithful LTE ON/OFF FOR thunderbolt app still works like a charm to control the radio bands on an HTC phone.
Highly recommend to install to force lte or 3g when needed.

The S3 in particular had a wretched radio, I couldn't get signal for the life of me in my house. Verizon ended up replacing it for me with a Note 2 which was better in many regards. The radio so far on the M8 has blown the note 2 out of the water, it doesn't even compare. I get a steady 10-20 asu improvement over what I used to get with the note 2 in most situations.

Liking what I've read so far.

Been so so for me. I've always had ATT and personally only had bad reception in my home. Almost anywhere else I had 4g LTE everywhere. Never saw Edge connection, worst was 3G.
I just switched to Verizon for this device when it came out so first time with Verizon. I get better 4g LTE connection at home but I've noticed in stores I get only 1x (is this Edge type of network compared to AT&T?) Or maybe 1-2 bars of 3G. Only get 4G LTE when outdoors. Even inside huge Target, Wal-Mart, whatever get cfao reception when on AT&T this was never an issue. This might be a carrier thing though, nothing to do with this device but again nothing to compare to, first device and time on Verizon network. Surprising too living in southern California where LTE is literally everywhere here. Actually had much higher hopes for Verizon network, feeling let done here.