Develop Bugs

Radio problems? Try this

I know there is a lot of talk about the radio issues the Nexus has been experiencing. My experience is a lot like many others. I would go do use my phone (data or text) which showed I had two or three bars of service. As soon as I tried to use maps or send a text I would loose all service and have to wait about two minutes before everything connected again and only then would I be able to data or voice. I had people telling me that they would try to call and get a fast busy signal.
For some reason my Nexus was dropping its signal entirely but I would still show bars, only after trying to use a signal would the phone realize that it was disconnected and reconnect to the network. Very very very frustrating.
For ****s and giggles I disabled LTE and switched to CDMA only. For two straight days I didn't have a single problem (except no 4g of course). Soon as I turn LTE back on I start dropping signal again. I think the phone has a problem with either keeping LTE active while sleeping or it can't gracefully do handoffs with LTE and CDMA.
On the other hand, If I run pandora and have LTE active I won't loose connection. I've tried this in a two hour car ride all around So Cal which supports the phone sleeping theory.
Anyway, if you're having the same issues try running CDMA only for a couple days and see if that helps.

I'm in. Switching now

I can't say anything to confirm or reject your findings because I have a GSM Galaxy Nexus. Is there no way to switch to CDMA when the screen is off/sleep mode and when the screen is active switch LTE on. That way background data and voice still work albeit at a slower connection but you never lose connectivity.
Just a theory, I assume that LTE switching off would be to save on battery life. I personally use Tasker to switch data off when screen is off and when it's on I set it to turn the data on too. I have seen a massive increase on battery when phone is idle and my standby is just short of around 1 week (tested when I had forgotten my charger and USB cable and deliberately didn't turn screen on to conserve battery life, had 8-9 phone calls during that period no issues)
Sent from my Galaxy Nexus using xda premium

I switched LTE off purely to stop my data from dropping.

First of all, thank you OP for posting this info
And this is exactly what VZW customer service people want us to do as one of the "solutions" to LTE drop. And I've been using this phone with 4G off due to the drop this entire time, but this is more like a remedy..
On the advertisements for Verizon GNex : "The fastest, most reliable network and the latest 4G LTE Galaxy Nexus Device comes to life!"
On the phone with VZW customer service after you purchase this phone eager to use 4G : The representative tells you... "Why don't you turn the LTE off, and just use it as CDMA?"
And we are thinking 1) where is the supposed update that was to come since 3 months ago?
2) We feel like we bought a Ferrari and the maker is telling us we shouldn't drive faster than 80mph.......If we go pass that speed, our engine is going to be shut off.
LOL...sad..

This works. My signal has been pretty stable since turning off LTE ... Battery life has increased as well ...
Now I'll try rooting my phone and installing a 4.0.4 radio and see how it goes...

This issue sounds like it may be addressed in the update rumored for next month. (Problems with data when the device sleeps.) Here's a quote from Droid Life.
Our friend, the Mobile Panda aka @black_man_x tossed out a quick, but important Tweet this afternoon that has to do with your Galaxy Nexus. As someone that has a well known insider track record when it comes to Verizon and LTE devices, we usually listen when he has something to spit out. Android “4.0.5″ and “April” is what he dropped today. According to Sir Panda, 4.0.5 is in testing and fixes “audio reboot issue as well as data falling asleep.” That should make you smile, right? April is a bit late seeing as the device was released in December, but what can you do?

sdmf91 said:
This issue sounds like it may be addressed in the update rumored for next month. (Problems with data when the device sleeps.) Here's a quote from Droid Life.
Our friend, the Mobile Panda aka @black_man_x tossed out a quick, but important Tweet this afternoon that has to do with your Galaxy Nexus. As someone that has a well known insider track record when it comes to Verizon and LTE devices, we usually listen when he has something to spit out. Android “4.0.5″ and “April” is what he dropped today. According to Sir Panda, 4.0.5 is in testing and fixes “audio reboot issue as well as data falling asleep.” That should make you smile, right? April is a bit late seeing as the device was released in December, but what can you do?
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Click to collapse
I remember going through the same thing when I got the Thunderbolt. There were all kinds of issues but eventually they all got worked out

bazzawhite said:
I can't say anything to confirm or reject your findings because I have a GSM Galaxy Nexus. Is there no way to switch to CDMA when the screen is off/sleep mode and when the screen is active switch LTE on. That way background data and voice still work albeit at a slower connection but you never lose connectivity.
Just a theory, I assume that LTE switching off would be to save on battery life. I personally use Tasker to switch data off when screen is off and when it's on I set it to turn the data on too. I have seen a massive increase on battery when phone is idle and my standby is just short of around 1 week (tested when I had forgotten my charger and USB cable and deliberately didn't turn screen on to conserve battery life, had 8-9 phone calls during that period no issues)
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
This particular issue isn't about saving battery life. It's about the cellular connection dropping out completely. Many users (myself included) have this happen several times a day. I can be in an area with a strong, full signal, and then all of a sudden my phone is searching for service. This happens far too often, and it happens both when I'm using the phone and when it's idle. Having LTE switch off when the phone is asleep isn't particularly useful for this issue because the connection drops when I'm trying to use the phone. I don't notice the connection dropping when the phone is idle unless I miss a call and get a voicemail later.
For me, I still randomly lose connectivity in CDMA only mode, although not nearly as frequently as when I have LTE on.

Prevent maps app from running all the time if you want to save battery. I use Gemini app manager from the market. I block maps from starting at boot and have seen significant battery life increases. App functions normally when ran too.

Learnt something about Canadian LTE from a buddy who works for a carrier here

So I was enjoying a cigar with a buddy who is a field tech for a Canadian carrier (not mine rogers, but another one) when we got on the topic of a samsung tablet work issued him.
He said he uses it to troubleshoot LTE issues they've been having.
Basicly the device loses LTE and either goes into "no service" or get's stuck in HSPA+.
I freaked because i've noticed the same issue, but thought it was related to CM10 running on my phone.
Apparently they discovered it has to do with they're infrastructure. The phone loses LTE, tries to re-negotiate,gets rejected, and stops trying.
They're work around is to get firmware updates to get the devices (he didn't mention which ones) to re-negotiate a second (or third time) where it almost always goes through.
I just reboot or bounce air plane mode and it often works.
Just figured people might find that interesting.

stavrosg said:
So I was enjoying a cigar with a buddy who is a field tech for a Canadian carrier (not mine rogers, but another one) when we got on the topic of a samsung tablet work issued him.
He said he uses it to troubleshoot LTE issues they've been having.
Basicly the device loses LTE and either goes into "no service" or get's stuck in HSPA+.
I freaked because i've noticed the same issue, but thought it was related to CM10 running on my phone.
Apparently they discovered it has to do with they're infrastructure. The phone loses LTE, tries to re-negotiate,gets rejected, and stops trying.
They're work around is to get firmware updates to get the devices (he didn't mention which ones) to re-negotiate a second (or third time) where it almost always goes through.
I just reboot or bounce air plane mode and it often works.
Just figured people might find that interesting.
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Click to collapse
Bell has had the same issue (for a while), I haven't received any calls about it recently but also didn't receive an email about it being resolved but it appears so. Our temporary resolution for it was to just keep it at H+ for the time being
Found where I posted about it here

I'm on fido with a rogers phone and I have never lost LTE
Sent from my SGH-I747M using XDA Premium HD app

stavrosg said:
So I was enjoying a cigar with a buddy who is a field tech for a Canadian carrier (not mine rogers, but another one) when we got on the topic of a samsung tablet work issued him.
He said he uses it to troubleshoot LTE issues they've been having.
Basicly the device loses LTE and either goes into "no service" or get's stuck in HSPA+.
I freaked because i've noticed the same issue, but thought it was related to CM10 running on my phone.
Apparently they discovered it has to do with they're infrastructure. The phone loses LTE, tries to re-negotiate,gets rejected, and stops trying.
They're work around is to get firmware updates to get the devices (he didn't mention which ones) to re-negotiate a second (or third time) where it almost always goes through.
I just reboot or bounce air plane mode and it often works.
Just figured people might find that interesting.
Click to expand...
Click to collapse
When I bought my S3 at the Bell store here in Québec city a few weeks ago, the salesmen insisted on NOT giving me a LTE sim card.
What he told me conquers with what you are describing.
I accepted is suggestion and got a H+ micro sim.
Since then, I returned to the store to get a LTE sim card and I did encounter the issue once or twice.
I am now forcing my phone to remain on H+ at best via Settings > Wireless & networks > Mobile networks > Network mode.

In the greater HRM (Halifax/Dartmouth/Bedford) we have a pretty good LTE footprint according to the Rogers website, but my S3 is constantly reconnecting. I can tell because every time it drops LTE, my visual voicemail app will notify that it has no service.
I turned LTE off because it was just hammering my battery. I could barely make it through a 10 hour work day with little to no usage if I leave LTE on, and I'm supposedly in the middle of the service area.

trendiggity said:
In the greater HRM (Halifax/Dartmouth/Bedford) we have a pretty good LTE footprint according to the Rogers website, but my S3 is constantly reconnecting. I can tell because every time it drops LTE, my visual voicemail app will notify that it has no service.
I turned LTE off because it was just hammering my battery. I could barely make it through a 10 hour work day with little to no usage if I leave LTE on, and I'm supposedly in the middle of the service area.
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Click to collapse
Off topic: CM10 has awesome battery life with LTE i find

I first read about LTE causing loss of service several months ago. I returned my first SIII because of it and the replacement phone would also loose service randomly. So now if I want to be assured that my phone is working when I really need it to, I have to disable LTE. Seems like more people need to know this since for some people it is important to know that your phone hasn't just decided to go into NO SERVICE mode without warning.
I'm told service providers were, until recently, strongly denying there is any such problem with LTE. It wasn't until the iphone5 came out with the same issue that this became a real problem for customer service.

What cigar were you smoking?
Sent from my SGH-I747 using Tapatalk 2

Hoshneer said:
What cigar were you smoking?
Sent from my SGH-I747 using Tapatalk 2
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Click to collapse
Partagas Series D #4 and montee cristo edmundo.

stavrosg said:
Partagas Series D #4 and montee cristo edmundo.
Click to expand...
Click to collapse
Mmm, blunt wrap =P

HiKsFiles said:
When I bought my S3 at the Bell store here in Québec city a few weeks ago, the salesmen insisted on NOT giving me a LTE sim card.
What he told me conquers with what you are describing.
I accepted is suggestion and got a H+ micro sim.
Since then, I returned to the store to get a LTE sim card and I did encounter the issue once or twice.
I am now forcing my phone to remain on H+ at best via Settings > Wireless & networks > Mobile networks > Network mode.
Click to expand...
Click to collapse
That's completely stupid... hopefully you didn't have to pay for the replacement.

stavrosg said:
Partagas Series D #4 and montee cristo edmundo.
Click to expand...
Click to collapse
Oh, hell dude. You can never go wrong with a PSD 4 one of my absolute favorite Cubans. I haven't had the Montecristo yet but I've heard good things. Good choices man.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2

Not sure if this is the same issue, but I sometimes receive a "not registered on network" or "sim not registered" when phone switches from LTE to 4G or comes back after being in a no service area.
A tech calls me once a week to track the issue and he told me last week they put out a fix for eastern canada and will soon do the same out west if it works. This is Telus by the way.
If you are running into what I mentioned all you have to do is switch to GSM/HSPA Auto mode under - settings/more settings/mobile network/network mode.
Of course you won't have LTE but its a reliable temp solution if you require consistent service.

MTS LTE
I've heard similar from MTS about their LTE!
My Galaxy S3 works fine on LTE, but my brother's S2 LTE never seems to display LTE on the screen, just says 4G all the time, yet speed test results indicate it really IS LTE! The first 2 weeks, his phone kept dropping to NO SERVICE randomly, but more often than not! We swapped out the LTE SIM on day 2 since the first seemed to be defective. After that, I updated the S2 to the latest release OS which seemed to have remove SOME of the issues.
From what I've heard, the LTE towers need the phone to be quiet on network activity for 20 seconds or so before it will attempt to jump back onto LTE. The S3, being much faster, doesn't seem to have issues flipping around as it needs. I'm told they are deciding which software/firmware to upgrade their towers too which will hopefully happen early 2013!
So I'm wondering if this might be the same issue with other carriers, where the problem is ACTUALLY with the towers and not devices?!

zexco said:
That's completely stupid... hopefully you didn't have to pay for the replacement.
Click to expand...
Click to collapse
Not that stupid as I, like I said, did experience the issue since I got my LTE sim card.
But to answer your question, no I did not have to pay for the new sim card.

I've done the same. I find "4G" fast enough for the most part, so I just leave LTE off for the gain in battery life.
Also in Halifax I might add!
Sent from my SGH-I747M using xda app-developers app

Cant connect to 3g and 4g/LTE

Yesterday I got my new GS3 in the mail. I used to have an iphone but I got an early upgrade and hated it so I switched(since my tablet has Android and I like it much better). In the box with my new phone name a new sim card however it was already punched out of the bigger card it normally comes in(not sure if this has anything to do with it but I will put it in here just in case). I put that card aside and took out the sim card from my iPhone and put that in my GS3, then I put the new sim card in my old iPhone. Everything worked fine, I got a cellular signal on my GS3 and I could use cellular data(what I presume was 3G) and no signal on my iPhone. However I noticed that there was no icon telling me if I was connected to 4G/LTE, I looked but I couldnt find any switch to turn it on in the settings. So talking with my friend today he suggested that I use the new sim card I got with my phone to see if that gave me 4G/LTE. I switched the cards back and I got signal on my iphone and the symbol telling me I was on 3G but did not get a signal on my GS3. I let it sit for a bit but nothing changed, so I switched them back. However now I could only make calls or texts on my GS3 and not use cellular data at all. I looked up my problem and I have tried the following: turning it off and on again, making sure packet data was turned on, resetting my APNs. I know that was a book to read through but I was told once to recount all I could, thank you in advance for at least getting this far.

Go to AT&T store, tell them to switch your data plan from iPhone to LTE smartphone. I had this issue a month ago. You can do it online also under your account feature manager but I went to them in person so I don't mess anything up.

Cell Service issues

I picked up an unlocked att galaxy note 2 to replace a broken phone. I use straight talk (att) as my service provider. I had to change my sim cards from a regular to a mini for the note. It took a couple minutes and my service was great. I tested the speeds and they were decent. I was able to send/receive mms,sms and phone calls. It was great all day. Later that evening, I went to the movies. They must have a cell blocker or something because it killed my service (same thing happened to me the week before with my old working phone). I had to go into airplane mode and back out to get service back. It was kind of weak after that. This morning I woke up with no cell or data service. I would look at the bars go up to full 4g then drop to 1 bar at edge and then lose all service. Just random spikes that happened all day. I tried various apn setting w/ no difference. I rooted my phone with cleanroom. I had solid 2-4 bars for a few hours. Then again, I started to lose service. I tried my fiancee's T-mobile pay as you go card and same thing. little to no bars of edge or nothing at all. I did the hack to enable aws, the Tmobile card had a solid 4 bars of cell but no data. I put my straight talk sim back in and I seem to be holding 3+ bars of 4g with decent speeds but The trend has been to wait til I get my hopes up then crush them with 0 service. I have looked into the interwebs, but haven't seen anything with a problem quite like this. I'm wondering if I just got a bum phone or if my mini sim is poop. Any help would be great. Thanks.

Going through more settings, I'm getting "Network Not Found" under the status list in About phone. Pretty much anything that has to do with a carrier isn't there. I then went under mobile network settings and looked at "Network Operators". It was set to automatic so I clicked manual. The only option was AT&T. The phone is supposed to be unlocked. I then clicked back to automatic and it's not able to find my provider info.

i467- data drops and scrolling problems

I bought a rooted AT&T Note 8 a while ago to use on a T-Mobile tablet plan. When I used my phone's sim to unlock it it showed LTE but hasn't since. I've checked the apn settings, restarted it, removed and reinserted the sim- nothing. I've also experienced occasional data drops (but very few total service drops). I've used unlocked AT&T Note 1's in the same area in the past with no problems.
I thought it might be the sim so I went to a T-Mobile store. We put a new sim in, saw LTE, and then restarted it when they added the new sim to my account. Same problem. Two different reps confirmed the LTE apn was correct. Speed tests are definitely showing hspa. I don't mind not having jet fighter speeds but the terrible latency and data drops are frustrating.
I'm also seeing occasional freezes while, and only while, scrolling. Tapping the home button takes it to home immediately. Everything else is fast and smooth.
i467 rooted, unlocked, on a T-Mobile tablet plan, a few xposed modules, some little things frozen with titanium, but otherwise stock 4.1.2.
I manually reset the battery a week ago (7+ hours of screen time on 4g since!) and, except for the above, everything has been great. Any ideas?

Well, here's one answer...
http://support.t-mobile.com/thread/74240