LTE driving me insane, lose it after switching to airplane mode. - AT&T, Rogers, Bell, Telus Samsung Galaxy S III

Hello, I am on a rooted stock Jelly Bean Telus ROM with default recovery (I flashed the rooted stock image through ODIN). Every now and then I will lose LTE even though I am in an LTE area. I try to do the trick of turning on airplane mode and turning it off to get the connection to reset. This actually doesn't do anything. HOWEVER, if I restart the phone, I get LTE back with 20 seconds. Once it restarts it can stay on LTE for a long time. Even when I get a call it'll go to 4G and then switch to LTE once I finish.
But here's the kicker. If after I restart it, get LTE, THEN switch to airplane mode and switch back, it will never, ever connect to LTE again. I have to restart the phone to get it back. I've just done a hard reset and the same problem occurs. This sounds completely ridiculous and I've tried everything. Has anyone heard of anything as absurd as this?

Aftcomet said:
Hello, I am on a rooted stock Jelly Bean Telus ROM with default recovery (I flashed the rooted stock image through ODIN). Every now and then I will lose LTE even though I am in an LTE area. I try to do the trick of turning on airplane mode and turning it off to get the connection to reset. This actually doesn't do anything. HOWEVER, if I restart the phone, I get LTE back with 20 seconds. Once it restarts it can stay on LTE for a long time. Even when I get a call it'll go to 4G and then switch to LTE once I finish.
But here's the kicker. If after I restart it, get LTE, THEN switch to airplane mode and switch back, it will never, ever connect to LTE again. I have to restart the phone to get it back. I've just done a hard reset and the same problem occurs. This sounds completely ridiculous and I've tried everything. Has anyone heard of anything as absurd as this?
Click to expand...
Click to collapse
Had the exact same problem with a Telus rom, I dont suppose you're on ATT by any chance?. Mine wouldn't connect to the mobile data network when coming off a wifi connection and would just hang in limbo until i switch mobile data on and off. Dumped it and went to a ATT based rom, problem solved. One thing I noticed is that the APN options with the telus rom are different than ATT roms, the apn type in particular

Ask in Q&A or the sticky thread for LTE
Thanks

Related

Phone won't connect to network.

Hi I have a GSM Galaxy Nexus and today I simply stopped receiving signal on it. I don't know how or why. I didn't flash anything or even use my phone at all. At one point it was working fine, then I noticed that where my signal bars should be, I have nothing but greyed out bars and an "X" on top of that. This was hours ago. I called T-Mobile(I use T-Mobile Prepay) and they had me do several things like remove battery and sim, and nothing helped. I have a custom ROM(Black Bean). I have used this ROM for weeks with no issue. Just to make sure I did a nandroid and I restored my old Stock-Rooted ROM. Still no signal. I then did a full wipe did a full wipe and installed Black Bean 3.1.2(older version which I know for a fact works fine) on a clean install. Still there is no signal. If I try to make a call, it tells me to turn off Airplane mode before making a call. But I am 100% that Airplane mode isn't on. I can go and turn it on, then back off even. Still I have no signal. I have no way of knowing if this is my phone or T-Mobile having tower problems. I called but they don't know anything since it was the pre-pay support line call center in India.
I have been generally disappointed with T-mobiles service. I would gladly give up the rest of my current month and re-subscribe to Straight Talk with ATTs Towers right now, but I'd have to get service going with them again and that would cost 45 bucks. And it's a waste if there is something wrong with my phone. So now I don't know what to do! =/
Edit: Quick update, I put in my Straight Talk SIM thinking that even if it were out of minutes, it would at least let me connect to the towers so that I can add more. Still nothing. If I hold down power(under stock) it brings up the power screen and that tells me that Airplane Mode is on even though I have it off in settings. If i click on that message, it says "Airplane Mode is OFF" but it isn't really, because if I go out and back in again, it's back to saying that it's on. However, I do have it turned off in my settings. I will also mention that WIFI does work.
Check if you activated the 2G option under Mobile settings. I had a similar issue a few weeks back. Almost drove me mad.
Sent from my Galaxy Nexus using xda app-developers app
Sounds like your phone is the problem if there's discrepancies about whether airplane mode is on.

[Q] Samsung S3. No LTE after reboot

It is my first forum post and I believe I am posting it in the right section... I tried finding a similar problem to mine, but seemed to only find people that wanted to turn LTE off instead of on. The AT&T Galaxy S3 phone is rooted and I have gone between ics and jb roms and have gotten LTE to work every time. The problem is after I reboot the phone I lose LTE. I get 20+ up 10 down on LTE. After I loose LTE I get around 8 up 4 down.
I have tried.
1.) Re-installing a rom which gives me LTE until I reboot phone.
2.) I have tried installing modems from http://forum.xda-developers.com/showthread.php?t=1831898. If I have lost LTE after reboot, I can (9 out of 10) get LTE to work again after installing a modem. I lose it once I reboot the phone again though and am unable to flash a new modem to get LTE back to working and it won't unless I do 1.) again.
3.) I have made sure apn settings are on the correct pta lte setting. Usually most of the rom's have that already set to begin with.
4.) I have tried the *#2263# to change it to LTE. This WORKS and will reboot my phone into LTE everytime, but I lose being able to make phone calls, etc. From what I understand as well, I am unable to go to 3g/2g after settings LTE ALL and I don't want that either...
It is the only problem I have had with this phone. I notice a lot of times after I install a rom and reboot, it upgrades, and I lose LTE. I install a modem and get LTE back. I reboot phone normally without doing anything to the phone and it upgrades apps again and I lose LTE. That is the only conclusion I can come to as to why I lose LTE after reboot.
terminalerror said:
It is my first forum post and I believe I am posting it in the right section... I tried finding a similar problem to mine, but seemed to only find people that wanted to turn LTE off instead of on. The AT&T Galaxy S3 phone is rooted and I have gone between ics and jb roms and have gotten LTE to work every time. The problem is after I reboot the phone I lose LTE. I get 20+ up 10 down on LTE. After I loose LTE I get around 8 up 4 down.
I have tried.
1.) Re-installing a rom which gives me LTE until I reboot phone.
2.) I have tried installing modems from http://forum.xda-developers.com/showthread.php?t=1831898. If I have lost LTE after reboot, I can (9 out of 10) get LTE to work again after installing a modem. I lose it once I reboot the phone again though and am unable to flash a new modem to get LTE back to working and it won't unless I do 1.) again.
3.) I have made sure apn settings are on the correct pta lte setting. Usually most of the rom's have that already set to begin with.
4.) I have tried the *#2263# to change it to LTE. This WORKS and will reboot my phone into LTE everytime, but I lose being able to make phone calls, etc. From what I understand as well, I am unable to go to 3g/2g after settings LTE ALL and I don't want that either...
It is the only problem I have had with this phone. I notice a lot of times after I install a rom and reboot, it upgrades, and I lose LTE. I install a modem and get LTE back. I reboot phone normally without doing anything to the phone and it upgrades apps again and I lose LTE. That is the only conclusion I can come to as to why I lose LTE after reboot.
Click to expand...
Click to collapse
I am in the same boat as you. I can force LTE with *#*#4636#*#* and setting it to LTe only. But I lose phone calls and if I restart it goes back to WCDMA.
What rom are you using some roms don't have the late icon they have 4g instead. Also double check that you have the right lte apn enabled
Sent from my SGH-I747M using xda app-developers app
offwiththeface said:
What rom are you using some roms don't have the late icon they have 4g instead. Also double check that you have the right lte apn enabled
Sent from my SGH-I747M using xda app-developers app
Click to expand...
Click to collapse
Yea I realized that jb roms do not show 4g lte, they just show 4g. I check to see if I have LTE by doing going to the Settings->About Device-> Status and looking at Mobile network type... and/or a speed test as well.
I came from and tried these rom's
Year of The Dragon
Ariel.2.07 [2ETO][Aroma]
WanamLite Smooth,Stable & Battery
Right now I am on Stock TouchWiz Jelly Bean PORT (JellyBean 747 Milestone 3)
I have gotten LTE speeds on every single one of the roms until I reboot phone.
[Update- Best Solution So far]
I found that using the WanamLite Rom http://forum.xda-developers.com/showthread.php?t=1782732 enabled me to get LTE back fairly easy.
Everything is in the Settings->More Settings->Mobile Networks area.
1. I entered in a new Access point and just put Name: "pta" APN: "pta". You can fill out the rest like the MMSC, MMS proxy, etc but I did not need to.
2. Then went to Network Operators and waited for it to search for the networks (takes a minute or two). It showed up for me as two options being Maritime and AT&T. I selected Maritime and registered it. I was not able to register on AT&T and I don't even know what Maritime is. However,
3. I went to Network mode: Set it to GSM/HSPA/LTE(Auto mode). I get LTE every time.
Every time I reboot I can get LTE to work by doing steps 2.) and 3.) and is a little annoying, but better than having to flash a rom every time I reboot and lose LTE. I would like to try and find a solution though where I wouldn't have to do this every time I reboot.
[EDIT] There might be roaming charges, but by disabling Data roaming you should be fine. I believe you might incur charges if you try connecting to this network while on a cruise and have data roaming enabled. I have not done a lot of research on this so I could be wrong.

[Q] Issues with data when I travel away from home

Hello, I am having a weird issue. Whenever I travel 30+ minutes away from where I live my data never works. I am currently running Jellybam 7.0. I cannot connect to the network at all. I have tried with roaming on and off, and also I go and select my network and can try any of the networks listed, or have it choose automatically, still no data.
I haven't tried another ROM yet, but I'm not sure that it is a ROM issue. Has anyone else had something similar happen? My girlfriend has her GS3 stock and she will have internet and I won't. As soon as I get closer to home everything starts working like normal, but if I am far away no amount of rebooting, airplane mode or data toggling makes it work.
Suggestions?
I'll have to try a new ROM as well, just really like Jellybam.

[Q] Can't get LTE

So I've been using Cyanogenmod night lies for since the GS3 launched and have never gotten LTE I always thought that coverage hadn't gotten to my area but finally decided to check with a local sprint store and the guy that worked there had the same phone with full 4g. So now I've realized it's something with my phone. I did some research and checked that it might possible be my baseband so as of the moment I'm running MC3 withcCyanogenmod still. But still no 4G. Anyone have any idea what u may be doing wrong? Thanks
Make sure your phone is set to LTE/CDMA/EvDo instead of CDMA/EvDo auto in the mobile network settings.
^^yeah turn it on.
Transmitted with a portable device using Xparent Blue Tapatalk 2
I have it turned on, and I've tried switching it back and forth a few times + the airplane mode trick etc.
sheky said:
I have it turned on, and I've tried switching it back and forth a few times + the airplane mode trick etc.
Click to expand...
Click to collapse
Make a nandroid backup of your current setup and then flash a TW ROM and see if you can get LTE then. If you still can't try updating your profile & PRL.

[Q] N-7105 Network select trouble

Hi. I recently bought (almost new) second hand N7105 and having really little troubles with it, one irritates me pretty much.
On are where Im living there is really good 4g and 3g signal. Everytime I reboot the phone and give pin, it goes for roaming mode for
aproximately 1 minute before getting to network. If its on 4g and I make a call or someone calls, it switches to 3g but after the call,
dont switch back to 4g.
When I switch it in network mode option, com.android.service crashes EVERY time. But it still switches it.
And when im in 3g mode it seems to prefer 3g more than H+ so like browsing on net it drops to 3g but when clicking a link etc.
phone does nothing before it has switched to H+.
I did call to customer service and they thought its maybe a update that didnt install correctly and adviced me to do factory reset.
That just made it worse. I really dont fancy to send it for repair since it seems to be only software problem but on other hand,
I dont wanna loose warranty by flashing custom rom at this point. Any advices or ideas?
Let me put it this way... What is the easiest way to install stock firmware without losing warranty?
And does it contain risks like changing imei?

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