Develop Bugs

I can only access H+ and not LTE

I recently got a LTE sim card, and an LTE data plan with Fido. 4G worked for about 5 seconds (I even did a speed test) and then now it's permanently on H+.
APN is set to LTEmobile.APN but when I change to Network Mode LTE/GSM, my signal goes blank and stays like that until I go back to GSM/WCDMA, which doesn't make any sense.
I'm using Task's 10/28 Build, which is the only build that doesn't have black screen unlock.
I tried updating to his latest 4.2 but LTE still didn't work.
Any ideas on what is wrong?

Sepharite said:
I recently got a LTE sim card, and an LTE data plan with Fido. 4G worked for about 5 seconds (I even did a speed test) and then now it's permanently on H+.
APN is set to LTEmobile.APN but when I change to Network Mode LTE/GSM, my signal goes blank and stays like that until I go back to GSM/WCDMA, which doesn't make any sense.
I'm using Task's 10/28 Build, which is the only build that doesn't have black screen unlock.
I tried updating to his latest 4.2 but LTE still didn't work.
Any ideas on what is wrong?
Click to expand...
Click to collapse
Please invest $10 and get a LTE sim card from FIDO it will work with LTE sim card.

ysr84 said:
Please invest $10 and get a LTE sim card from FIDO it will work with LTE sim card.
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Click to collapse
did you not read what he said? He has an LTE sim card. To the OP try a google search and see if there are any different apn's. Its not rom related because task650 gets LTE speeds with his rom. Or if your phone is unlocked and you know someone else that has the same phone or LTE sim card pop it in and try it out
Sent from my SGH-I747M using xda premium

I'm suffering the same problem on rogers. Going to flash back to stock rooted to fix the problem, then try again. I'll do this tomorrow as its getting late.
Sent from my Nexus 7 using xda app-developers app

Download LTE on/off from the play store and switch to lte only, I'm on fido and I had the same problem
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

pjcordi said:
Download LTE on/off from the play store and switch to lte only, I'm on fido and I had the same problem
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
Tried it but didn't connect to lte.
Sent from my Nexus 7 using xda app-developers app

Some ROMs have incorrect Fido/Rogers APN settings; I'd go over what's in the ltemobile.apn settings and compare it to a known good set (such as the ones in the stock ROM).

Soft bricked my phone by going back to rooted stock ROM through Odin. Guessing I should have formated system. Anyways fixed it up. Got lte working on rooted stock. Then when to miui no lte. Read that lte is a problem with many on this ROM so I lose. Hope I can get it working eventually when off stock.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

onei0077 said:
Soft bricked my phone by going back to rooted stock ROM through Odin. Guessing I should have formated system. Anyways fixed it up. Got lte working on rooted stock. Then when to miui no lte. Read that lte is a problem with many on this ROM so I lose. Hope I can get it working eventually when off stock.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
Carriers use different labels for H+/LTE - ROMs differ in how they interpret the actual signal speed.
Some ROMs accurately reflect the network speed, some don't.
Some carriers promote/sell speeds that they cannot provide in every area.
There are many possible explanations as to why you are experiencing this.
You should provide your ROM, carrier, APN settings, network speedtest results, etc. for more in-depth answers.

Data Connectivity help please

hey guys hows it going,
i currently have a t-mobile galaxy s4 m919 i unlocked my phone via fastgsm.com its a great and affordable unlocking site i recommend it to anybody that cant get the free unlock to work
after getting my phone unlocked and spending alot of time with At&t on the phone i got my data to work
my problem is staying connected to my network data when im on the road i get no data whatsoever when i should be getting it with no problem
so at first i thought it could of been the rom i was using so i tried other roms and even went back to stock and i still have the same problem
then i tried doing wipes doing resets and none of it fixed my problem
whenever i leave a wifi area or just leave the phone on standby i loose data connection on my phone only way for my phone to pick up att data is if i reboot the phone or turn it into airplane mode then off ill get the 4g connection and only then is there a patch or something i can do for my phone so i dont have to do this everytime
is anybody else using a m919 with att
if so do you guys experience this problem ive tried so many ways of tryna get it to work including the *#*#4636#*#* and set my preferred network type to lte/gsm/cdma and it switches back to LTE/GSM auto (PRL)

Bump
Sent from my SGH-I337 using XDA Premium 4 mobile app

Are your apn's correct?
Sent from my SGH-M919 using xda premium

Yes they are I get lte and regular data hspa but it will only work when I put the phone in airplane mode then shut it off basically resetting the radio
Sent from my SGH-I337 using xda app-developers app

lacussumok said:
Yes they are I get lte and regular data hspa but it will only work when I put the phone in airplane mode then shut it off basically resetting the radio
Sent from my SGH-I337 using xda app-developers app
Click to expand...
Click to collapse
What is your modem version? MDL is the latest.

lordcheeto03 said:
What is your modem version? MDL is the latest.
Click to expand...
Click to collapse
How do I check that ?
Sent from my SGH-I337 using xda app-developers app

lacussumok said:
How do I check that ?
Sent from my SGH-I337 using xda app-developers app
Click to expand...
Click to collapse
Glad I'm not the only one with this problem. This doesn't happen all the time which is weird. When it does happen though, it's a pain in the ass.

lacussumok said:
How do I check that ?
Sent from my SGH-I337 using xda app-developers app
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Click to collapse
Wuzz Ranger said:
Glad I'm not the only one with this problem. This doesn't happen all the time which is weird. When it does happen though, it's a pain in the ass.
Click to expand...
Click to collapse
Settings->More->About Phone. You'd be looking for baseband on that screen; it should be M919UVUAMDL. If it's **MDB you could try updating your modem/baseband.

lordcheeto03 said:
Settings->More->About Phone. You'd be looking for baseband on that screen; it should be M919UVUAMDL. If it's **MDB you could try updating your modem/baseband.
Click to expand...
Click to collapse
mine is M919UVUAMDL

Flashed Htc One ?

I am wondering if a sprint Htc One flashed to verizon would get as good of a signal and a verizon branded One?

Most likely not. Different carriers run on different frequencies.

GrayTheWolf said:
Most likely not. Different carriers run on different frequencies.
Click to expand...
Click to collapse
But if they run off the same tri-band cdma freq. , or for example sprint run 800 and verizon run say 805 ?
Just curious is all.

funone46 said:
But if they run off the same tri-band cdma freq. , or for example sprint run 800 and verizon run say 805 ?
Just curious is all.
Click to expand...
Click to collapse
That's LTE which isn't used for voice right now. The CDMA networks aren't even close.
Sent from my HTC6500LVW using xda app-developers app

cstrife999 said:
That's LTE which isn't used for voice right now. The CDMA networks aren't even close.
Sent from my HTC6500LVW using xda app-developers app
Click to expand...
Click to collapse
Like I said just curious, I see sprint phones flashed to verizon and claim to work just fine.

funone46 said:
Like I said just curious, I see sprint phones flashed to verizon and claim to work just fine.
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Click to collapse
That can't be... Unless I'm mistaken that is impossible. The CDMA frequencies aren't even close...
Sent from my HTC6500LVW using xda app-developers app

cstrife999 said:
That can't be... Unless I'm mistaken that is impossible. The CDMA frequencies aren't even close...
Sent from my HTC6500LVW using xda app-developers app
Click to expand...
Click to collapse
I have a Htc evo 4lte flashed to pageplus which runs on verizon pre paid coverage.

funone46 said:
I have a Htc evo 4lte flashed to pageplus which runs on verizon pre paid coverage.
Click to expand...
Click to collapse
.... That sounds wrong... Maybe their postpaid is different. From what I understand not only are the frequencies different version must sign off on every phone on their network...
After some research I've seen both sides being positive they are right. One constant though is that Verizon must sign off on every phone in their network. Perhaps their post paid works differently.... Or maybe I'm wrong
Sent from my HTC6500LVW using xda app-developers app

I used to run a Sprint HTC Touch Pro on the Verizon network.
I ported it over, but that was years ago.
Both 1x voice and evdo/3g worked fine.
Was a bit trickier to get 3g then it was the 1x but lte certainly won't work on a Sprint on Verizon.
I certainly wouldn't go buy one from Sprint though planning on getting the ESN to get passed by their checks.
That's all I will say about that aspect.
Sent from my HTC6435LVW using Tapatalk 4

funone46 said:
I am wondering if a sprint Htc One flashed to verizon would get as good of a signal and a verizon branded One?
Click to expand...
Click to collapse
I'm not sure about sprint but the vzw one is global which means ANY network will work, but you won't get better data . I just popped a metro pcs Sim in my DNA and my son is using it with no issues except weak data .
Sent from my HTC6500LVW using Tapatalk 2

cbrown245 said:
I'm not sure about sprint but the vzw one is global which means ANY network will work, but you won't get better data . I just popped a metro pcs Sim in my DNA and my son is using it with no issues except weak data .
Sent from my HTC6500LVW using Tapatalk 2
Click to expand...
Click to collapse
just because a phone is global doesn't mean it will work on all networks. there are too many possible bands to acct for. You would need several radios, which would eat battery.
"Global" phones will work on the most popular bands.
As far as LTE, there is not a chip that has all the US bands.

cbrown245 said:
I'm not sure about sprint but the vzw one is global which means ANY network will work, but you won't get better data . I just popped a metro pcs Sim in my DNA and my son is using it with no issues except weak data .
Sent from my HTC6500LVW using Tapatalk 2
Click to expand...
Click to collapse
Global doesn't mean that at all.... The Droid 2 Global doesn't work on all networks. It simply means it will work in multiple countries...

Cannot lock on to a 4G signal on my SM-N900T

Hi
So I have a T-mobile unlocked SM-N900T that I'm currently using in London. I'm on Lycamobile and want to try their 4G network but for some reason my phone just will not connect to LTE. 3G works fine but that's as far as it will go.
I've been able to use 4G in India on the same phone so I know it does work, but for some reason it just wont connect here. I've tried the *#2263# service menu and selecting LTE -> ALL just gives me the no signal / network icon.
Have tried resetting, pulling out the battery and SIM but nothing seems to work.
Has anyone had these issues or any suggestions?
Oh - phone is Unrooted and running the latest KK update.
Any help or advice is graciously accepted. Cheers!

They just might be using a band for LTE that the phone doesn't have/support.
Sent from my SM-N900T using Tapatalk

Thanks, shouldn't this phone be able to handle the various bands though?
Sent from my SM-N900T using xda app-developers app

A331709 said:
Thanks, shouldn't this phone be able to handle the various bands though?
Sent from my SM-N900T using xda app-developers app
Click to expand...
Click to collapse
It handles a bunch of them, but not all. I'd look up the band their service uses for 4G, and see if it's compatible with your phone.
Sent from my SM-N900T using Tapatalk

Cheers sir. I'm on the phone with them now and they don't seem to know! What are the usual bands that would normally be used in London though?
Sent from my SM-N900T using xda app-developers app

A331709 said:
Cheers sir. I'm on the phone with them now and they don't seem to know! What are the usual bands that would normally be used in London though?
Sent from my SM-N900T using xda app-developers app
Click to expand...
Click to collapse
Find a phone that they sell and look up spec's and compare.
Sent from my SM-N900T using Tapatalk

Thanks Andrew. I'll give that a go. They've called me a few times but keep reading from the same script. Was promised a call back on Sunday, but nothing and its Tuesday already!
They don't offer contracts as they are only PAYG but let me look up specs for O2, as they piggyback their network.
Sent from my SM-N900T using xda app-developers app

Ok. ..so it would seem that the tmobile phones operate on different lte bands. So I've attempted to flash an international rom on this phone and as the Eagle eyed will note, this was done successfully. I should therefore have an international modem etc now? But I still can't connect to 4G! So does this mean that this is a device (actual hardware) issue or can this be sorted by flashing a modem that allows me to connect to all bands?
Sent from my SM-N9005 using xda app-developers app

Lock
XxLostSoulxX said:
It handles a bunch of them, but not all. I'd look up the band their service uses for 4G, and see if it's compatible with your phone.
Sent from my SM-N900T using Tapatalk
Click to expand...
Click to collapse
Thanks for this post. Its very helpful for me.

Just checking if anyone has any ideas. Thank you.

It handles a bunch of them, but not all. I'd look up the band their service uses for 4G, and see if it's compatible with your phone.

jacqueline robert said:
It handles a bunch of them, but not all. I'd look up the band their service uses for 4G, and see if it's compatible with your phone.
Click to expand...
Click to collapse
Ummm...not trying to be a ****, but why would you repeat a previous post?
Can anyone please advise if flashing a new modem will sort this out for me? I've already tried Knox so may as well give it a try. Suggestions and expert advice please?
Sent from my SM-N9005 using xda app-developers app

Posted in error

[Q] At&t S3 On MetroPCS LTE/TmobileLTE

Hi guys, i have a s3 i747 that has been unlocked and ready to be used on other gsm networks.
I went to a metropcs store and had the phone activated and sim card inserted, my imei was connected fine and everything went great.
I instantly had EDGE(1x or 2g) and even after hours of searching and phone calls to metropcs all i can find is APN solutions that dont work.
I currently live in Dallas/Ft Worth so i know the LTE coverage for Metropcs/Tmo is amazing it just ill not connect to LTE.
How do i get LTE to work on this device ??
Phone Specs
Has root
Unlocked
S3 i747 from At&t
Worked fine on At&T for LTE
Su keeps for closing at start because it says security issues
Stock rom on 4.3 but it says custom build under about settings for some reason.
Data speed is about 0.09-0.10mbps
Any help would be great. Sorry if this is a repost of other types of threads but i never found answers and did not want to re awaken old threads.

macklin345 said:
Hi guys, i have a s3 i747 that has been unlocked and ready to be used on other gsm networks.
I went to a metropcs store and had the phone activated and sim card inserted, my imei was connected fine and everything went great.
I instantly had EDGE(1x or 2g) and even after hours of searching and phone calls to metropcs all i can find is APN solutions that dont work.
I currently live in Dallas/Ft Worth so i know the LTE coverage for Metropcs/Tmo is amazing it just ill not connect to LTE.
How do i get LTE to work on this device ??
Phone Specs
Has root
Unlocked
S3 i747 from At&t
Worked fine on At&T for LTE
Su keeps for closing at start because it says security issues
Stock rom on 4.3 but it says custom build under about settings for some reason.
Data speed is about 0.09-0.10mbps
Any help would be great. Sorry if this is a repost of other types of threads but i never found answers and did not want to re awaken old threads.
Click to expand...
Click to collapse
This issue seems popular this week.
If it's like the others, it's an issue from unlocking. the nv file gets damaged. The solution so far is to use nv-reader-writer to copy another phone's nv file and replace yours with it.

have you tested *#*#4636#*#* method? just mess around with the preferred network and see
I'm on Tmobile and worked fine with LTE

Where could i find a nv file for the s3 i747?

pcshano said:
have you tested *#*#4636#*#* method? just mess around with the preferred network and see
I'm on Tmobile and worked fine with LTE
Click to expand...
Click to collapse
I have a little, i am now trying it will report back thanks guys.

macklin345 said:
Where could i find a nv file for the s3 i747?
Click to expand...
Click to collapse
either your own backup of imei or your friend's

pcshano said:
have you tested *#*#4636#*#* method? just mess around with the preferred network and see
I'm on Tmobile and worked fine with LTE
Click to expand...
Click to collapse
pcshano said:
either your own backup of imei or your friend's
Click to expand...
Click to collapse
So when i switch to wcdma it gets 4g but some reason my phone gets no signal, then gets barely any and it says emergency calls only. This is highly frustrating. Is there a guide for NV??

macklin345 said:
So when i switch to wcdma it gets 4g but some reason my phone gets no signal, then gets barely any and it says emergency calls only. This is highly frustrating. Is there a guide for NV??
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2374063

I am in dallas and have the exact same issue. Same phone. I will research this more and if you find out anything, PM me.
Sent from my SAMSUNG-SGH-I747 using XDA Free mobile app

brad65807 said:
I am in dallas and have the exact same issue. Same phone. I will research this more and if you find out anything, PM me.
Sent from my SAMSUNG-SGH-I747 using XDA Free mobile app
Click to expand...
Click to collapse
Look on the post above yours, the solution is there.

Will this give me LTE? I am able to get h+ but my phone does love to set on edge.
Sent from my SAMSUNG-SGH-I747 using XDA Free mobile app

brad65807 said:
Will this give me LTE? I am able to get h+ but my phone does love to set on edge.
Sent from my SAMSUNG-SGH-I747 using XDA Free mobile app
Click to expand...
Click to collapse
You do realize 4g and LTE are the same thing?

BWolf56 said:
You do realize 4g and LTE are the same thing?
Click to expand...
Click to collapse
false. 4g is hspa+ and LTE is LTE.
Sent from my SAMSUNG-SGH-I747 using XDA Free mobile app

Jakeuten said:
false. 4g is hspa+ and LTE is LTE.
Sent from my SAMSUNG-SGH-I747 using XDA Free mobile app
Click to expand...
Click to collapse
he meant if you're on AOSP, then 4G = LTE.

brad65807 said:
I am in dallas and have the exact same issue. Same phone. I will research this more and if you find out anything, PM me.
hey man its very frustrating ive been trying to find every thing i can to solve this issue, i will keep in touch if i solve it brother
Sent from my SAMSUNG-SGH-I747 using XDA Free mobile app
Click to expand...
Click to collapse
BWolf56 said:
Look on the post above yours, the solution is there.
Click to expand...
Click to collapse
Sir, i tried to use the nv tool but it keeps saying phone wont connect.
i have the drivers installed, it sees my ports for the phone, i go to connect and it does, but when i click read device it fails. Ive had no boxes checked, one box checked and both boxes for spc and fast read(i think it is) checked. No Go either way. Any suggestions for this? Then i can see if the NV Writer is a solution. Also i can use my own NV file right??? Or would that just be a corrupted file being reloaded ?? If thats the case how do i find a clean NV file for a Samsung Galaxy S3 i747 for AT&T??? Thanks again for the help brother

I would think you would need to load an NV of a different s3. I will try to load my NV here in a few and see what happens. PM me also
Sent from my SAMSUNG-SGH-I747 using XDA Free mobile app

Ok guys i tried some settings. a guy i know tried to inject the AWS for Tmobiles band freq. and it didnt work.
SOooooooooo im thinking we might have to skip AT&T phones on metro/tmo and get a tmo phone or a AT&T phone that supports AWS band freq.

brad65807 said:
Will this give me LTE? I am able to get h+ but my phone does love to set on edge.
Sent from my SAMSUNG-SGH-I747 using XDA Free mobile app
Click to expand...
Click to collapse
Wait....How are you getting 4g ?? it might not be LTE but da*m its faster than Edge. Could you tell me your apn, and your settings if you changed anything since you first switched to metropcs.
Like dial star, hash(number sign)twice, the 4636 and star,hash star, hash and go to device info, then screen shot, then scroll down and screen shot again where i can see "set preferred network"
also man are you sure you have the S3 I747 from AT&T??

Make sure you are checking your connection in Settings > About Device > Status > Network Type
You cant always trust what's displayed in the status bar. Especially when using a custom rom or using a device on a different network than it was intended for.

Yea man I know. I've checked everything and says edge still.
I think it's based on your radio and kernel. Brad what kernel and radio you using.?
I'm on 4.3 Rooted and stock.