[Q] ATT signal troubles on H815 US - G4 Q&A, Help & Troubleshooting

I purchased my phone (h815 US model) online from swappa and I love the feel and look of the phone, Love the camera, BUT my phone wants to stay on hspa all the time. Where i had 3 or 4 bars on my s5 active I get HSPA unless I go in to settings and sellect ATT:LTE from network operators which only last until my phone goes to sleep then im back on hspa. Anyone else experiencing this? Or anything i should try? Thanks in advance for any help!

Bumpers just in case someone who knows didn't see it. Sorry won't bump it again!

Craleb said:
Bumpers just in case someone who knows didn't see it. Sorry won't bump it again!
Click to expand...
Click to collapse
Maybe with hidden menu access via dialer,you can permanently enabled it...I don't know the actual code that might work for your device..but you can find it through here..In general threads maybe

I had to set the proper APNs on my H815, additionally I had to tell it to use GSM/WCDMA/LTE Auto under Network Mode in the Mobile Networks settings.
AT&T APN settings
www.att.com/esupport/article.jsp?sid=KB424489&cv=820
Pic of Mobile Networks
http://imgur.com/UtrfVUZ
After that, it's been using LTE where available.

Daptonic said:
I had to set the proper APNs on my H815, additionally I had to tell it to use GSM/WCDMA/LTE Auto under Network Mode in the Mobile Networks settings.
AT&T APN settings
www.att.com/esupport/article.jsp?sid=KB424489&cv=820
Pic of Mobile Networks
http://imgur.com/UtrfVUZ
After that, it's been using LTE where available.
Click to expand...
Click to collapse
Thank you @Daptonic . I was attempting to use the "ATT nxtgenphone" APN because it works better on ATT devices but I guess the ATT Phone APN is needed for non ATT devices. Rebooted phone and it went straight to 4g. Thanks for responding.
Edit: dammit, it went back to hspa again......

Related

Tmobile S4 on AT&T cannot connect to LTE help!

Hey everyone!
So I picked up a tmobile s4 to use on ATT since I read it was the most unlocked due to bands / bootlocker. I unlocked it via the method described on this site via the debug menu.
Popped in ATT sim, everything looked fine initially.
1. I'm only getting 4G in an LTE area. device hasn't picked up any LTE anywhere yet.
2. When I go under "Network Mode" and select "LTE/GSM/WCDMA (auto connect) the signal dies out and it always reverts back to GSM/WCDMA"
3. I've called ATT a few times and triple checked that I'm on an Android LTE data plan, so that's not an issue. ATT techs suggested it could be a device issue and maybe I should take it into their tech center.
4. Tried to set up ATT Visual Voicemail, that failed also.
So can it be a Sim issue? Maybe something on tmobiles side? Since device was never active on their network. A lemon S4?
I've run out of options
Any help would be appreciated.
TIA!
qidrox said:
Hey everyone!
So I picked up a tmobile s4 to use on ATT since I read it was the most unlocked due to bands / bootlocker. I unlocked it via the method described on this site via the debug menu.
Popped in ATT sim, everything looked fine initially.
1. I'm only getting 4G in an LTE area. device hasn't picked up any LTE anywhere yet.
2. When I go under "Network Mode" and select "LTE/GSM/WCDMA (auto connect) the signal dies out and it always reverts back to GSM/WCDMA"
3. I've called ATT a few times and triple checked that I'm on an Android LTE data plan, so that's not an issue. ATT techs suggested it could be a device issue and maybe I should take it into their tech center.
4. Tried to set up ATT Visual Voicemail, that failed also.
So can it be a Sim issue? Maybe something on tmobiles side? Since device was never active on their network. A lemon S4?
I've run out of options
Any help would be appreciated.
TIA!
Click to expand...
Click to collapse
are you using stock ROM?
Rattles said:
are you using stock ROM?
Click to expand...
Click to collapse
Yes I am, I guess I should've mentioned that
Apparently my data stopped working now too. No data at all
qidrox said:
Apparently my data stopped working now too. No data at all
Click to expand...
Click to collapse
Ok so after changing some options around in network i have 4G back up and running. Its on WCDMA/GSM now.
Did you check the apn to make sure its correct for att?
Sent from my SGH-M919 using xda premium
qidrox said:
Hey everyone!
So I picked up a tmobile s4 to use on ATT since I read it was the most unlocked due to bands / bootlocker. I unlocked it via the method described on this site via the debug menu.
Popped in ATT sim, everything looked fine initially.
1. I'm only getting 4G in an LTE area. device hasn't picked up any LTE anywhere yet.
2. When I go under "Network Mode" and select "LTE/GSM/WCDMA (auto connect) the signal dies out and it always reverts back to GSM/WCDMA"
3. I've called ATT a few times and triple checked that I'm on an Android LTE data plan, so that's not an issue. ATT techs suggested it could be a device issue and maybe I should take it into their tech center.
4. Tried to set up ATT Visual Voicemail, that failed also.
So can it be a Sim issue? Maybe something on tmobiles side? Since device was never active on their network. A lemon S4?
I've run out of options
Any help would be appreciated.
TIA!
Click to expand...
Click to collapse
Dial *#*#4636*#*# go under phone and scroll down and select the mode you want then reboot.
Sent from my SGH-M919 using Xparent Skyblue Tapatalk 2
Soldier 2.0 said:
Dial *#*#4636*#*# go under phone and scroll down and select the mode you want then reboot.
Sent from my SGH-M919 using Xparent Skyblue Tapatalk 2
Click to expand...
Click to collapse
Tried doing that. It says " USSD Code running" then it stops and states "Unable to process request"... I dont think that was normal?
Yeaaaayuh!
qidrox said:
Tried doing that. It says " USSD Code running" then it stops and states "Unable to process request"... I dont think that was normal?
Click to expand...
Click to collapse
Figured it out!!! Did a google search and noticed my APN values were wayyy off. Changed them. BAM LTE!! :laugh::good:
Thanks to all that helped!
Share those setting to help others !!!!!!!!
nmccready said:
Share those setting to help others !!!!!!!!
Click to expand...
Click to collapse
Go to settings> more networks>mobile networks> access point network> and change your settings to look like these....
In the "APNs" window just hit the + button to creat a new APN
Sent from my SGH-M919 using XDA Premium 4 mobile app
Thank you!
I also found the setting from here:
https://www.youtube.com/watch?v=gMyD8zqk-Hg which led to here: http://forum.xda-developers.com/showthread.php?t=2336085 .
The main end game fix was that ATT had my IMIE # incorrectly set. Once they fixed that my LTE was a go!
:good: :laugh:

[Q] No lte on unlocked at&t e980 using tmobile

Hi, im kind of new to xda and had a few questions about tmobile lte working on unlocked at&t optimus g pro. I am in a tmobile lte area and have got it with every phone I have had so far( at&t unlocked gs3, at&t unlocked note 2, at&t unlocked htc one, and even at&t unlocked note 1) but I cant seem to get it to work on this phone. I put my sim in my wifes at&t unlocked gs3 and got lte . Any help would be greatly appreciated.Thanks in advance
bigred1090 said:
Hi, im kind of new to xda and had a few questions about tmobile lte working on unlocked at&t optimus g pro. I am in a tmobile lte area and have got it with every phone I have had so far( at&t unlocked gs3, at&t unlocked note 2, at&t unlocked htc one, and even at&t unlocked note 1) but I cant seem to get it to work on this phone. I put my sim in my wifes at&t unlocked gs3 and got lte . Any help would be greatly appreciated.Thanks in advance
Click to expand...
Click to collapse
Not sure. All i know is when I put my t-mobile sim in mine I only get edge no 3G as I do know the bands for HSPA are not there but not sure about LTE
I had my att g pro on tmobile and got lte, when i get home i will put the tmobile sim card in and get the apn i use. That's all i did last time (insert sim and put apn manually)
Sent from my LG-E980 using xda premium
hyelton said:
Not sure. All i know is when I put my t-mobile sim in mine I only get edge no 3G as I do know the bands for HSPA are not there but not sure about LTE
Click to expand...
Click to collapse
I only got edge at first too but I know I live in a refarmed 1900 MHz area so I went under settings to network operators and searched networks manually and chose tmobile rat:14 when it gave me my options. Now I get 4g umts- hspap. I use wifi while home and after I leave sometimes it will revert back to edge. I went into the hidden menu but I didn't see how to select band prefence anywhere so im lost on how to get lte to work.
I know at&t and tmobile use the same lte band I just cant figure out how to select it to make it work. Try selecting setting>networks>tethering and networks>mobile networks>network operators>search networks. A few different tmobile ones should pop up with rat:2 rat:3 and rat:14 underneath. When I selected rat:2 it only stayed on edge but all other options gave me 4g.Hope that helps to at least get you 4g working.
natienn said:
I had my att g pro on tmobile and got lte, when i get home i will put the tmobile sim card in and get the apn i use. That's all i did last time (insert sim and put apn manually)
Sent from my LG-E980 using xda premium
Click to expand...
Click to collapse
Ok that would be great if you can post the complete apn your using. I have the fast.t-mobile but maybe another part of mine is incorrect...
I am pretty sure for LTE to work on T mobile, you have to make sure the apn is set to fast.tmobile.com. Your Sim might be setting it to the default epc.tmobile.com, which will only give you HSPA+.
Sent from my LG-E980 using xda premium
Brooose said:
I am pretty sure for LTE to work on T mobile, you have to make sure the apn is set to fast.tmobile.com. Your Sim might be setting it to the default epc.tmobile.com, which will only give you HSPA+.
Sent from my LG-E980 using xda premium
Click to expand...
Click to collapse
Yeah. Make sure it's fast.t-mobile.com though. I'm doing the exact same. Unlocked g pro on T-Mobile lte. Where are you at? I'm at D.C.
Sent from my LG-E980 using xda app-developers app
Yoshio_221 said:
Yeah. Make sure it's fast.t-mobile.com though. I'm doing the exact same. Unlocked g pro on T-Mobile lte. Where are you at? I'm at D.C.
Sent from my LG-E980 using xda app-developers app
Click to expand...
Click to collapse
Im in orlando fl. I have the fast.t-mobile.com apn entered and have tried 3 different tmobile sim cards in the lg optimus g pro
And still no lte. I just tried my sim in my wifes at&t galaxy s3 again and it got lte instantly.
I also have tried updating my firmware to the value pack but it didnt help. Any suggestions are greatly appreciated.
bigred1090 said:
Im in orlando fl. I have the fast.t-mobile.com apn entered and have tried 3 different tmobile sim cards in the lg optimus g pro
And still no lte. I just tried my sim in my wifes at&t galaxy s3 again and it got lte instantly.
I also have tried updating my firmware to the value pack but it didnt help. Any suggestions are greatly appreciated.
Click to expand...
Click to collapse
A quick Google search found these APN settings for you.
http://forum.xda-developers.com/showthread.php?t=2236735
borgib said:
A quick Google search found these APN settings for you.
http://forum.xda-developers.com/showthread.php?t=2236735
Click to expand...
Click to collapse
I appreciate the help but for some reason it still wont get lte. I have tried all the different apns I can find and after I enter it if it still only goes to 4g then I reboot. Is there anyway to select lte only from any hidden menus or an app or something?
bigred1090 said:
I appreciate the help but for some reason it still wont get lte. I have tried all the different apns I can find and after I enter it if it still only goes to 4g then I reboot. Is there anyway to select lte only from any hidden menus or an app or something?
Click to expand...
Click to collapse
on other phones, the following menu lets you pick what you want your data to be: *#*#4636#*#*, then pick lte/gsm auto from there.
RussianBear said:
on other phones, the following menu lets you pick what you want your data to be: *#*#4636#*#*, then pick lte/gsm auto from there.
Click to expand...
Click to collapse
I tried but it doesn't have the option to change the network mode. I actually just edited my build.prop to enable network mode under settings and it worked!!! I finally got lte by choosing lte/wcdma option. When all the options appeared my lte appeared to be shut off .So all I had to do was turn it back on. Huge thanks to MrDSL for the help.
After changing my network mode to lte wcdma my phone kept saying roaming notification off at the top of the status bar and all I could use was data ( lte at least) and wouldn't make calls and the network mode menu actually disappeared. So after putting in a at&t sim card and rebooting my phone about 20 times the network mode menu popped back up and allowed me to change my preference to gsm/wcdma/lte and luckly its working perfect now.
I have a g pro on tmobile but for some reason theres a few places where I don't get 4g or lte and the phone loosses signal for a min or two then I get E is this happening to someone else ?
trezegol said:
I have a g pro on tmobile but for some reason theres a few places where I don't get 4g or lte and the phone loosses signal for a min or two then I get E is this happening to someone else ?
Click to expand...
Click to collapse
Yes. It happens to me on my way home. 2-3 times. Live 35 mins from my job I go from a city to rural area 2 times. Not refarmed as of yet I get the nasty red x

LTE/CDMA in ro.radio.networkmode screws up phone.

Hi, guys I recently ran into an issue with the build prop modification in regards to network selection. If I enable the network selection as pointed out in one of the other threads and select LTE /CDMA my phone will lock on LTE however no phone calls can be made out or recieved. I had to reflash to 10k then reroot and then change the build prop to CA/TLS and finally hardreset via stock recovery. Anybody else have this issue?
UPDATE... looks like as long as i dont try to make a call the option to switch it back to auto is still there. One a call is attempted and fails the option to set to auto disappears.
fastwanabe said:
Hi, guys I recently ran into an issue with the build prop modification in regards to network selection. If I enable the network selection as pointed out in one of the other threads and select LTE /CDMA my phone will lock on LTE however no phone calls can be made out or recieved. I had to reflash to 10k then reroot and then change the build prop to CA/TLS and finally hardreset via stock recovery. Anybody else have this issue?
Click to expand...
Click to collapse
Most carriers Phone calls and Texts dont go through LTE...... If your setting it to LTE only thats why.
hyelton said:
Most carriers Phone calls and Texts dont go through LTE...... If your setting it to LTE only thats why.
Click to expand...
Click to collapse
I understand but after it's been on LTE for a while it doesn't give you the option to switch back.
fastwanabe said:
Hi, guys I recently ran into an issue with the build prop modification in regards to network selection. If I enable the network selection as pointed out in one of the other threads and select LTE /CDMA my phone will lock on LTE however no phone calls can be made out or recieved. I had to reflash to 10k then reroot and then change the build prop to CA/TLS and finally hardreset via stock recovery. Anybody else have this issue?
Click to expand...
Click to collapse
fastwanabe said:
I understand but after it's been on LTE for a while it doesn't give you the option to switch back.
Click to expand...
Click to collapse
Depending on what rom your using under mobile networks there is network selections with
LTE/WCDMA/GSM
GSM Only
WCDMA Only
and LTE only
hyelton said:
Depending on what rom your using under mobile networks there is network selections with
LTE/WCDMA/GSM
GSM Only
WCDMA Only
and LTE only
Click to expand...
Click to collapse
Right, thats what normally the options are however after about 5 min after selecting LTE/CDMA the only options that appear were.
LTE/CDMA
CDMA
thats it.
fastwanabe said:
Right, thats what normally the options are however after about 5 min after selecting LTE/CDMA the only options that appear were.
LTE/CDMA
CDMA
thats it.
Click to expand...
Click to collapse
How are you changing it? Changing it via Build.Prop? Then there is your problem, JUST change it using the setting under mobile networks..
hyelton said:
Most carriers Phone calls and Texts dont go through LTE...... If your setting it to LTE only thats why.
Click to expand...
Click to collapse
hyelton said:
How are you changing it? Changing it via Build.Prop? Then there is your problem, JUST change it using the setting under mobile networks..
Click to expand...
Click to collapse
I'm changing it under mobile networks.
Stop changing it to lte/cdma and you're phone will no longer mess up. Leave it on gsm/wcdma/lte auto. You're phone will switch when the appropriate network is available!!!
Sent from my LG-E980 using XDA Premium 4 mobile app
fastwanabe said:
Hi, guys I recently ran into an issue with the build prop modification in regards to network selection. If I enable the network selection as pointed out in one of the other threads and select LTE /CDMA my phone will lock on LTE however no phone calls can be made out or recieved. I had to reflash to 10k then reroot and then change the build prop to CA/TLS and finally hardreset via stock recovery. Anybody else have this issue?
Click to expand...
Click to collapse
Simple fix. Just select airplane mode for a few and then toggle it off and you'll see your network options come back once data roaming turns off and your carrier logo appears. I typically run lte/CDMA to get consistent lte speed bit when a callsade I have the same issue as you. But I just gave your the fix so your good
Sent from my LG-E980 using Tapatalk 2
Jammol said:
Stop changing it to lte/cdma and you're phone will no longer mess up. Leave it on gsm/wcdma/lte auto. You're phone will switch when the appropriate network is available!!!
Sent from my LG-E980 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Thanks a lot captain obvious, the point of the thread wasn't to "not switch it" dude, it's finding a work around and make everybody aware of what happens.
fastwanabe said:
Thanks a lot captain obvious, the point of the thread wasn't to "not switch it" dude, it's finding a work around and make everybody aware of what happens.
Click to expand...
Click to collapse
It would happen on any phone!!!!!

no LTE on at&t - unlocked m919

I've seen several discussions about this but didn't seem to find a working solution. I'm currently using GNF1 V3 NB4, I tried using the apn settings for at&t and also called them to make sure they have the correct imei number. Also, for some reason under the "Network mode" I don't have an LTE option, I only have WCDMA/GSM, GSM ONLY AND WCDMA ONLY. I am able to get 4G but no LTE. Is there any solution or any other way to solve this problem?
nir360 said:
I've seen several discussions about this but didn't seem to find a working solution. I'm currently using GNF1 V3 NB4, I tried using the apn settings for at&t and also called them to make sure they have the correct imei number. Also, for some reason under the "Network mode" I don't have an LTE option, I only have WCDMA/GSM, GSM ONLY AND WCDMA ONLY. I am able to get 4G but no LTE. Is there any solution or any other way to solve this problem?
Click to expand...
Click to collapse
Change ro.product.name= in the build.prop to say jfltetmo
will it also change the speed or just add an "LTE" symbol?
Give you the LTE option in network modes and change the icon. Speeds? Probably since youll have LTE back
ShinySide said:
Give you the LTE option in network modes and change the icon. Speeds? Probably since youll have LTE back
Click to expand...
Click to collapse
ok, i have the LTE option in "network modes" now, however the speed is more or less the same and I don't have LTE bar, not sure whether it's because of my current location or what.. is there anything else I could edit to try to make it work?
If I change the ro.product.model , name and device to at&t values would I get the LTE speeds just like an at&t s4?
nir360 said:
ok, i have the LTE option in "network modes" now, however the speed is more or less the same and I don't have LTE bar, not sure whether it's because of my current location or what.. is there anything else I could edit to try to make it work?
Click to expand...
Click to collapse
When I bought this phone from T-Mobile I was still on an AT&T plan. Before I jumped ship over to Net10 Wireless I used AT&T's LTE all over Pensacola. That was on a sim-unlocked, unrooted, otherwise 100% stock M919. Did you double-check your APN's? Perhaps you're just not in an area where you can pick up LTE?
Yes I use the correct apns the ones that at&t gave me, but im gonna try to go back to stock then change the apns to at&t and maybe that will work.. but even if it will, I don't know if I could keep using GNF1 or would I have to use a different rom, anybody else have or had issues with getting LTE on at&t while using custom roms and knows roms that work? (Preferably tw)
See your network type in settings > about phone > status. Try to get LTE with your AT&T SIM on another phone then install it back to your M919.
Sent from my Samsung M919 using XDA developers app

[Q] D851 LTE europe doesn't work

hello every one.
My lte doesn't work. I already test with the rom paranoid and CM.
I m from morocco our 4g is new and i think is the same as the europe 4g (lte).
Do you have any idea ?
Pls help
Thank you for your time
up
Help pls i need to flash modem ?
Which carrier are you using in Europe? Are you roaming from T-Mobile or have you purchased a different service/SIM card in Europe?
Also, what country are you in specifically?
There was a guide somewhere on XDA regarding Qualcomm processors and band unlocking using QXDM (LTE) and QPST (GSM/WCDMA) though I forget the exact name. I believe there was also concern that it could damage antennas. Also I have no idea if it actually works and mucking around in the NV RAM space is very risky. I would not advise it.
Is at least the GSM service working? If so, is it really that bad that you need LTE? Personally I would leave it at "oh the gsm works, I'm good". :good:
Depends on the carrier you are using, is your phone unlocked? I would assume that it is since your can receive gsm signal.... Anyways, what you would want to do is check your network's APN and check our phones APN settings and add the 4g/LTE APN settings to your phone manually... Then restart your phone and try again, make sure you select the apn after adding it so you know it's active. Try that. If that doesnt work, then go into your APN settings again and just do (reset apn setings) or something along the lines of that which resets/restores your apn settings back to normal/default.... either one could work, try the first one first ofc! G:L:

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