Develop Bugs

Why don't I get 4g?

According to the sprint 4g data map I am supposed to have 4g in my area. I type in my address and i'm "supposedly" in a very strong 4g coverage area, yet i have owned the EVO for over a month and have yet to see 4g at my house.
I contacted sprint numerous times about this issue and all they do is claim that I should be getting 4g but they don't know why I'm not, then I get transferred to another tech.... Sprint has by far the worst customer service of any major corporation I have seen in a long time.....
but anyways.... I'd really like to know why i'm not getting 4g when blocks less than a mile away from me are. according to sprint reps and the 4g coverage map I should have very good 4g...
So does anybody know what might be going on?

Well, you're not giving us much information to go on here. But, is the problem simply that you aren't getting a 4G signal inside your house? If so, that's perfectly normal. The 2500Mhz spectrum that Sprint's WiMax uses doesn't penetrate buildings well at all. Do you get any signal if you go outside?

rooted or un rooted? stock rom or custom rom? newest radios?
details please!

nenn said:
rooted or un rooted? stock rom or custom rom? newest radios?
details please!
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This.
And as stated, building penetration can be an issue. Have you floated around the town / neighborhood / city / wtf ever to see if you can get a signal elsewhere?
I can't get a signal at my buddies house, in the backyard (self described "lounging" zone), but on my porch I can get a solid signal. Matter of blocks away which is curious. Small blocks ... I guess as small as blocks go? But I'd check around!

As stated earlier we need more info. Is your phone rooted and running a custom rom or are you unrooted running stock rom? Are you running the updated Wimax Radio? This is the two most significant questions that needs to be address before we can give a pin point solution for your issue...

Sorry for assuming you guys where psychic...lol...
but anyways, i'm fully rooted running the latest evio rom with kings kernel #6. I have had plenty of roms from dc 3.2.3 to fresh to cm. I have always had the most updated radios and wi-max.
I get 4g in many areas around me, just not at my house, which is my dilemma. I think I got it ONCE while standing outside but it was very brief (I have tested numerous times outside and inside my house) I am on my third evo and none of them got 4g in my house rooted or un-rooted. Same with my bro's evo.
My concern is that according to sprint I should be getting EXCELLENT 4g coverage in and outside my house, yet I get none....
I'm assuming this is a network problem, since sprint is so so ****ty and decided to use dumb frequencies, but are their possible any "tweaks" that I can try?

There are no tweaks I know of, but I have found that Clear's WiMax maps are much more accurate (and depressing) than Sprint's. See if they say that you should have 4G.
___
An army of pacifists can be defeated by one man with the will to fight.

FYI,
According to Sprint's coverage maps, I should get great signal everywhere I used my phone.
In reality, I can't even consistantly make a phone call inside my house or office unless the moon and the stars are in perfect alignment...
Verizon and AT&T both work flawlessly in both locations as well.
Something about Sprint's frequencies that just don't penetrate buildings well at all and seem to be more prone to small "dead zones".
Wish I had 4G within 3 hours of here though...

starplaya93 said:
I'm assuming this is a network problem, since sprint is so so ****ty and decided to use dumb frequencies, but are their possible any "tweaks" that I can try?
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they aren't sprint's "dumb frequencies" - they're clearwire's. sprint borrows it.
check coverage at www.clear.com for more up-to-date maps.

T989D Reception issues with Wind

I got an unlocked galaxy s2x and im currently using it with wind. Everything is fine when i have full bars in areas with good reception. In areas with poor reception such as my basement and certain parts of the city, it says I have 2-3 bars and the signal quality is around -93db and everything sucks after. My friends ask why they cant connect to me and people on the other end of my phone calls say that my voice is scrambled. For text and mms messages, when I try to send them it almost always fails.
Just wondering, anyone having similar issues? Is it my device? Are other people on the wind, moblicity or even telus networks also experiencing this?

My fellow co-workers and I just got this phone at work. And it seems a couple of us are having spotty issues. We are on Telus. We seem to be having more Hello? Hello? Can you hear me? moments then we did with our Telus Mike phones. I am running Juggernaut 4.1 and everyone else is stock. I am looking into trying a new radio.

it depends in your area
i'm on Wind no issues at all
see reference
http://community.windmobile.ca/windmobile/topics/excellent_reception_leslie_st_elgin_mills_rd_e
http://community.windmobile.ca/wind...ham_stouffville_hospital_ninth_line_church_st
http://community.windmobile.ca/wind...a_bandwidth_steeles_avenue_east_at_mccowan_rd
there's more if you want
http://community.windmobile.ca/windmobile/topics/good_reception_around_kennedy_14th_ave
http://community.windmobile.ca/windmobile/topics/horrible_reception_at_donald_cousens_pkwy_16th_av (they just fixed it, but this was before their fix)

Its strange though cause when I had my samsung vibrant, I was able to make calls and recieve messages in my basement. I decided to test my s2x and vibrant together in my basement. The vibrant had a db level of -103 and my s2x has -94db. I was able to make calls and people said my voice wasnt distorted at all. When I tried with the s2x again, people said they couldnt hear me or they said my voice was scrambled and distorted.
I dont know if its my radio or if its with wind. If its the radio, im hoping an update from telus would be able to fix it.

you can also try one of the custom ROMs from the DEV section
i'm running Jugger

vongola27 said:
I got an unlocked galaxy s2x and im currently using it with wind. Everything is fine when i have full bars in areas with good reception. In areas with poor reception such as my basement and certain parts of the city, it says I have 2-3 bars and the signal quality is around -93db and everything sucks after. My friends ask why they cant connect to me and people on the other end of my phone calls say that my voice is scrambled. For text and mms messages, when I try to send them it almost always fails.
Just wondering, anyone having similar issues? Is it my device? Are other people on the wind, moblicity or even telus networks also experiencing this?
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Click to collapse
I'll be honest with your half of your issue is WIND related. Not phone related. I use to be with Wind and I can tell you.. I hated it. I live in an apartment so even at times my phone (previously) would randomly disconnect itself and reconnects.. or I'd have 1 - 2 bars. I'm in the major city of Toronto so signal is no exception.. However.. its not the same.. as they say. The signal I receive from Wind was horrible. I had to go back with Telus and I've had next to no problem with Telus.

I have the exact same setup and not having that severe of a issue at all. I do have trouble with certain spots within toronto but most of the time it works fine.
Sent from my SGH-T989D using XDA App

vongola27 said:
My friends ask why they cant connect to me and people on the other end of my phone calls say that my voice is scrambled.
Just wondering, anyone having similar issues? Is it my device? Are other people on the wind, moblicity or even telus networks also experiencing this?
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Click to collapse
Sighx said:
I'll be honest with your half of your issue is WIND related. Not phone related. I use to be with Wind and I can tell you..
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I'm not so sure that it is depends only with operator.
I'm leaving in Europe, but have similare problems with scrambled voice during phone calls and drops calls.
Before I used Samsung Vibrants, Captivate and Infuse. All of them works in same locations without any problems and voice quality was amazing.
I tested two different unlocked Herculeses t989, with two differnt operators and all available radio' modems for AT&T/Rogers Skyrockets and T-Mobile/Telus T-989. Both t-989 have same issues with all modems and voice quality worst compare Infuse/Captivate/Vibrant.
Both t989 runs stock rooted roms
My operator data range:
GSM/GPRS/EDGE 900Mhz/1800Mhz
UMTS/WCDMA/HSPA+ 2100Mhz

well in OP's case it's definitely Wind the phone network, if you go to the Wind forum, you can see people complaining the same thing with every and any cell phone ever built

I'd say 80% of it is Wind's fault, and 20% the phone. Flash the T-Mobile radio and see if it makes a difference. When I made the switch to Wind from Mobilicity, EVERY text would fail even though they have a tower less than a km from my house. I flashed the T-Mobile radio from Mr. X's thread and now I've had a dramatic change in service quality.
I wonder if I did that when I was with Mobilicity, maybe it would have made things better too :/

AllGamer said:
well in OP's case it's definitely Wind the phone network, if you go to the Wind forum, you can see people complaining the same thing with every and any cell phone ever built
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People do complain but its also exaggerated and inflated by rumours by their competitors. I remember this Guy from bell who said its much better to go with them because wind phone calls will fail a third of the time which is simply not true. It fails maybe 1 out of 15 times and I'm not paying 80 dollars per month to be with Rogers or bell. If I'm paying the lowest rate on the market right now I'm gonna expect occasional failures in service.
Sent from my SGH-T989 using XDA App

i've never had a failed call
and if i do, is only when i have absolutely no connection as in Zero bars (which well it;s very obvious why lol )

Wow never a failed call? U must be on wind premium... Lol
Sent from my SGH-T989 using XDA App

Im also on wind. I agree with flashing your modem. I notice improvement on my coverage.

I can tell you right now its not wind. I've been with them for almost a year now and everything has been solid except when i go out of the city and I have to pay for extra roaming charges. I used my samsung vibrant (t959) on winds network since day 1 right till I got the s2x. I was able to make calls in my basement and in areas with 1-2 bars and everything just worked fine. With my s2x, when i have 1-2 even sometimes 3 bars, calls dont get connected through, my messages wont send or recieve, and my data doesnt work. I have to have the full 4 bars for it to be able to work well.

No reception issues here
I live in Kitchener and I've had the Optimus 2X and now the Galaxy S2X on WIND. I haven't noticed any differences in reception, but it could be that I just don't notice. My brother has the G2X now - there's a spot near the university that should be covered that I've been having issues getting a signal with. Perhaps I'll take his phone and test it out sometime.
I definitely don't have as much issue as the previous poster. Even with 2 bars of service my data and texting works fine. 0 to 1 bar is a little sketchy, but that's to be expected. I flashed the T-Mobile radio the second day I got this phone, just because I thought it would help.

i could be wrong but isn't there u can buy signal booster from telus?

androidsyrup said:
i could be wrong but isn't there u can buy signal booster from telus?
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i don't think Wind sells Signal Boosters, and most people will not even know how to install one or want to afford one, as average price is around $350
if you buy one for Telus it will not offer AWS for Wind
so why would you want to get a signal booster from Telus? it does not compute

[Q] Sprint service with M8 - no voice or data with poor coverage

I'm having major problems with my new M8, my home is in a area were I receive fairly good signal were I get 3-4 bars but I'm unable to make calls or get data. I contacted Sprint and they sent me an Airrave for my home which appears to help but basically when ever I get into an area with poor coverage (2-3 antenna bars) thisM8 just craps out! Now the clincher is that in the same areas, my son's iPhone works fine, for example last week I was camping and while my M8 was useless as while it would pick up a signal, it couldn't text, make or receive calls while my son's iPhone (5s) had no problems so basically I just used his phone and stowed the M8 away.
I had the very same issue a year or two ago with my HTC EVO LTE, after complaining to Sprint they reprovisioned it and suddenly it worked fine until last month upgraded to the m8.
Is there any better rom or firmware that can help me with this? As long as it has a good strong signal, it's fine but unfortunately we're I live and travel to, Sprint's coverage is poor but still it's frustrating that it doesn't even seem to work roaming when it picks up other service towers as it warns me I'm roaming and addtional charges may be encurred. I have called Sprint and they deny there is any issue with their service yet all the Sprint stores in my area and the Sprint vendors strongly urged me to upgrade to the iPhone instead of an android phone as they all repeated the same story that in my area, Android phones don't work well and from what I have seen the are right.
Any words of advice or suggestions? I'm still in my grace period were I can return the phone, Sprint technical support is suggesting I return the phone as it might be defective which I might believe expect this one is doing the same as my prior until Sprint did something "special" to the old one which fixed it but now they claim it's not their problem.
In a nutshell, it comes to be a issue with the Android phone type as when this M8 won't work, other Sprint phones do such as iPhone and an older Kyocera flip phone which the Kyocera phone was the one I had to use to call Sprint as my M8 couldn't maintain a voice call connection longer than 10 to 20 seconds before it would drop the call.
I'm totally frustrated, any suggestions?

eBoyDog said:
I'm having major problems with my new M8, my home is in a area were I receive fairly good signal were I get 3-4 bars but I'm unable to make calls or get data. I contacted Sprint and they sent me an Airrave for my home which appears to help but basically when ever I get into an area with poor coverage (2-3 antenna bars) thisM8 just craps out! Now the clincher is that in the same areas, my son's iPhone works fine, for example last week I was camping and while my M8 was useless as while it would pick up a signal, it couldn't text, make or receive calls while my son's iPhone (5s) had no problems so basically I just used his phone and stowed the M8 away.
I had the very same issue a year or two ago with my HTC EVO LTE, after complaining to Sprint they reprovisioned it and suddenly it worked fine until last month upgraded to the m8.
Is there any better rom or firmware that can help me with this? As long as it has a good strong signal, it's fine but unfortunately we're I live and travel to, Sprint's coverage is poor but still it's frustrating that it doesn't even seem to work roaming when it picks up other service towers as it warns me I'm roaming and addtional charges may be encurred. I have called Sprint and they deny there is any issue with their service yet all the Sprint stores in my area and the Sprint vendors strongly urged me to upgrade to the iPhone instead of an android phone as they all repeated the same story that in my area, Android phones don't work well and from what I have seen the are right.
Any words of advice or suggestions? I'm still in my grace period were I can return the phone, Sprint technical support is suggesting I return the phone as it might be defective which I might believe expect this one is doing the same as my prior until Sprint did something "special" to the old one which fixed it but now they claim it's not their problem.
In a nutshell, it comes to be a issue with the Android phone type as when this M8 won't work, other Sprint phones do such as iPhone and an older Kyocera flip phone which the Kyocera phone was the one I had to use to call Sprint as my M8 couldn't maintain a voice call connection longer than 10 to 20 seconds before it would drop the call.
I'm totally frustrated, any suggestions?
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No one?
In searching I found reference in the Sprint user's forums about a issue of multi-band support causing this problem esp in areas were 4g LTE and 3G signal is marginal. The only solution held to any account is to turn off 4G LTE and reprovision the M8 which IMO is rather lame considering it's the top of the line HTC phone but given Sprint's marginal network that might be all that I can do.
Are there any ROM's that radio offer any relief from such?
Sprint's solution at least to provide some help was to send me Airrave which has helped at least at home in that I can at least make phone calls and texts.

Same problem
I'd like some insight on this issue too. I switched from a Galaxy note 3 to the M8 about a month ago, and ever since, my data and cell service is horrible. I never really had any issues with the Note. I have had to turn LTE off and just use 3g to be able to use it at all if I'm not on WIFI. It's pretty frustrating considering that I really like this phone, but I might have to go a different route if I can't get it fixed. My phone is rooted and has viper ROM on it and it didn't change a thing with the custom rom. I don't know what to do, but I'm about ready to jump ship. Any ideas would be appreciated. Thanks.

[Q] Is there an NK2 radio in a .zip flashable format?

Has anyone made a zip for the new radio?

If I have time I will do it tonight. I'll post in in my rom thread. Just curious, why do you need the modem unless you haven't upgraded to NK2 via OTA or Odin tar?

tx_dbs_tx said:
If I have time I will do it tonight. I'll post in in my rom thread. Just curious, why do you need the modem unless you haven't upgraded to NK2 via OTA or Odin tar?
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No, i have not taken the update. Doea the update wipe everything out? Im looking to kee0 things as they are but get the newer radio files due to spotty lte in a sprk covered area.

hammerchucker said:
Has anyone made a zip for the new radio?
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I have NK2 on my phone and it did nothing to improve my .5 to 1Mbs LTE in a SPARK area. So not real sure this is even worth your effort.

Solarenemy68 said:
I have NK2 on my phone and it did nothing to improve my .5 to 1Mbs LTE in a SPARK area. So not real sure this is even worth your effort.
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Having issues at work. I get the 40+ Mbit B41, its just that for some reason it wants to kick over to 3G fairly often. I have to do a few PRL updates to get back on it. I understand the B41 tower is a little ways away but i know from owning the note 2 that they have the slower B25 in the area too as i used to get it all the time with out issue and my note 4 never seems to connect to it, only B41.
Sprint said they are going to monitor me and my area and send me an update in a few days. They also suggested i take the new update but i dont really dont want start over right now so trying just the radio.

hammerchucker said:
Having issues at work. I get the 40+ Mbit B41, its just that for some reason it wants to kick over to 3G fairly often. I have to do a few PRL updates to get back on it. I understand the B41 tower is a little ways away but i know from owning the note 2 that they have the slower B25 in the area too as i used to get it all the time with out issue and my note 4 never seems to connect to it, only B41.
Sprint said they are going to monitor me and my area and send me an update in a few days. They also suggested i take the new update but i dont really dont want start over right now so trying just the radio.
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Click to collapse
Many including myself are having low LTE speeds. I have been going back and fourth with Sprint for three weeks now and am on my second Note 4 with the same issue.
I got elevated to a Senior Tech and he said that Samsung has said there is an issue with some N4's and Sprints LTE according to a log only he and those at his level has access to. He advised having Samsung reflash it. So I took it to a lcal repair facility after getting a service ticket from Samsung which also took a week of phone calls back and fourth. They reflashed it today and it still has the same problem. Near their facility I got 25Mbs.
At home however I only get .5 to 1Mbs and according to their coverage map aI am in SPARK heaven.

It's not your phone, it's Sprint. I've been dealing with the exact same thing for years. They keep sauing they're working on the network but I've seen faster data speeds on disposable prepaid flip phones. Your data speeds will depend on the tower you're connected to. I don't know what's taking so long for Sprint to get their network coverage and dats speeds consistent throughout a region but it hasn't happened yet from my experience. I get around 1mb download and anywhere from 250kbps to 500is on uploads. The speeds on LTE at my house aren't great but in other parts of town it works a lot better. I assume Sprint doesn't consider certain areas a "priority" on their upgrade list. So you can stop thinking it's your phone because I doubt very seriously that's the problem, I used to think the exact same thing and went through several device swaps with the same results. Sprint will give you the runaround and point the finger at anything and everything as well as claim they are working on the towers/network. Well they've been working on the towers around here since they introduced WiMax and the HTC EVO. Yes I've seen big improvements with data speeds and coverage but after this much time I expected a lot better data speeds. Like I said, Sprint doesn't consider some areas a priority and they don't do much to improve or upgrade in those places because it's not lucritive or cost effective due to the customer base in that given area. Now other places where you would expect very good service but only see 3G speeds on LTE, there's just no excuse for that because Sprint has had a LOT of time to get the network up to par with the likes of T-Mobile etc. It is what it is.

tx_dbs_tx said:
It's not your phone, it's Sprint. I've been dealing with the exact same thing for years. They keep sauing they're working on the network but I've seen faster data speeds on disposable prepaid flip phones. Your data speeds will depend on the tower you're connected to. I don't know what's taking so long for Sprint to get their network coverage and dats speeds consistent throughout a region but it hasn't happened yet from my experience. I get around 1mb download and anywhere from 250kbps to 500is on uploads. The speeds on LTE at my house aren't great but in other parts of town it works a lot better. I assume Sprint doesn't consider certain areas a "priority" on their upgrade list. So you can stop thinking it's your phone because I doubt very seriously that's the problem, I used to think the exact same thing and went through several device swaps with the same results. Sprint will give you the runaround and point the finger at anything and everything as well as claim they are working on the towers/network. Well they've been working on the towers around here since they introduced WiMax and the HTC EVO. Yes I've seen big improvements with data speeds and coverage but after this much time I expected a lot better data speeds. Like I said, Sprint doesn't consider some areas a priority and they don't do much to improve or upgrade in those places because it's not lucritive or cost effective due to the customer base in that given area. Now other places where you would expect very good service but only see 3G speeds on LTE, there's just no excuse for that because Sprint has had a LOT of time to get the network up to par with the likes of T-Mobile etc. It is what it is.
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I follow S4GRU and they also indicate it is the towers that choose, which is frustrating esp. when it seemingly kicks to 3g as soon as i start streaming a video.
My issue is not data speeds (even B25 gives me upwards of 8Mbit which is pleanty for video streaming), its staying connected to LTE.
I at least want to have the new radios installed so i can tell them i have NK2. I want to follow their procees through and if i still have the problem staying connected to LTE then i want a monthly discount untill its fixed (which theyve given before when i was getting no 4G at all in my area.
I went to Sprint in 2010 for the EVO and the WiMax that was up in my area, but its been a long painful rollout of the LTE. The reasin I stay is the old unlimited everything plan i still have.

hammerchucker said:
I follow S4GRU and they also indicate it is the towers that choose, which is frustrating esp. when it seemingly kicks to 3g as soon as i start streaming a video.
My issue is not data speeds (even B25 gives me upwards of 8Mbit which is pleanty for video streaming), its staying connected to LTE.
I at least want to have the new radios installed so i can tell them i have NK2. I want to follow their procees through and if i still have the problem staying connected to LTE then i want a monthly discount untill its fixed (which theyve given before when i was getting no 4G at all in my area.
I went to Sprint in 2010 for the EVO and the WiMax that was up in my area, but its been a long painful rollout of the LTE. The reasin I stay is the old unlimited everything plan i still have.
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I get the same damn thing, start streaming video on lte and then the note 4 drops to 3g, streaming is unusable at that speed. My s4 streamed perfectly fine and locked lte in the exact same areas. All the excellent real estate and I can't use it except on the wifi I pay for. I have old plan that has unlimited data and I'm not using it, note 4... Out

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.
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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.
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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.
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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.