[Q] KVT49L LTE Network Weirdness - Nexus 7 (2013) Q&A

Three-purpose post: ask for help, see if others have same problem, and warn others of potential problem with KVT49L.
Unrooted Nexus 7 LTE (2013) model that had worked flawlessly for 6 months on Verizon LTE network by using the SIM card from my Verizon Galaxy Nexus with unlimited data. No activation was required, I just put the SIM card in and it worked great.
I accepted the KVT49L update when it came out about two weeks ago and ever since then I've had really weird problems with LTE, and I'm a bit stumped what to try to fix it, short of a factory reset.
Symptoms: Despite having full bars and the LTE indicator, while driving using Waze navigation app, I'll start getting "no network connectivity" complaints from Waze. To make sure it wasn't a Waze issue, I'd open Chrome and try searching for something, which resulted in no response, indicating the N7 wasn't getting any network connectivity.
Just to make sure, I opened apps like Amazon store app, and strangely, it works: searching for stuff I've never searched (to eliminate caching), I'd get results.
Cycle mobile data, it works again for a while, then same thing.
To see if it was just the N7 apps, or the network itself, I used FoxFi to tether my HTC One to the N7, then ran Waze and Chrome tests mentioned above, and sure enough, same problems.
EDIT: forgot to mention that my Verizon Droid Maxx, side-by-side with the N7 also running Waze/Chrome tests has zero issues with network connectivity. When the N7 acts up, the Maxx works perfectly, so it doesn't appear to be an issue with Verizon's towers in the areas this happens.
Reboots, cycling mobile data don't fix it for any length of time.
Anyone else have similar problems?
Does this sound like a software issue with the update?
Could the update have allowed Verizon to screw with me because it's a phone SIM? Why would they care?
Any suggestions for additional troubleshooting or things to try fixing. I suppose a factory reset is in order, but always hesitant to take that step.

Related

TMobile US Random Reboots

So I'm having an issue that is starting to drive me nuts. I have 2 Defys. One is my work phone, one is personal. My work one has been fine for 2.5 months. This prompted me to get one for personal use. However within the last week I have started having issues with both of them randomly rebooting. Always within 10-15 seconds of each other. Work one is original rom, factory reset, unrooted. Personal one is rooted, .360 update, and a bunch of apps. On my to work and back home I can always get them to do this. I get a beep, no service notification, and then approx 2 minutes later they reboot. during this time they are extremely unresponsive. Already called TMobile thinking it was a tower issue, but all checks out well on their end. It's driving me nuts. Has anybody had this issue, or know how to solve it. I don't think its the phones. On wifi they run fine all day long.
Have you tried the newer uicc SIM? Was told by the pda team I should switch over. I told them I was experiencing a reception issue. Since both your phones have gone nuts at about the same time it's either service or aliens. You might try one sim swap and see if it helps.
Both of them are brand new sims right from the box. From what I've gathered they already are the newer sims.
Let me share my experience about random reboots. I had also put it up in here but didnt get much response.
I narrowed down after a lot of experimenting that the reboot happens because of one issue - "The phone tries to reconnect to data network while there is very low signal and suddenly goes into a boot"
It somehow boggled me for months on how this could happen only to me when none of the users in this forum had anything like that. I changed the phone too. But the reboot continues. I got an app called Shutupbattery which can automatically switch off data network when network strength is below a certain limit (i set it at -102dbm). This seems to have slightly impacted the rebooting process. I see some improvement but also not satisfied with this app. It still does not completely shut off the data network on the cut off value and hence the phone does manage to reboot again.
I am trying a few combinations of values and seeing if I can arrive at a conclusion. Let me know if this was useful. For me this is something like a deal breaker and I am feeling of giving up the phone or changing the service provider.
I can tell you for a fact that it has to do with signal strength and data. However 4 days after I discussed this with TMobile Tier 2 support, they dispatched techs to the tower and since then...no more issues. The few other towers I have had issues with I've done the same thing and all of a sudden the problem disappears. I've been very happy with the support. Better than ATT ever did. I suspect it has to do with their implementation of 4G. I've noticed when it does this I get a momentary connection to HSPA before the phone drops back to UMTS then GPRS. You can get to this menu bu going to *#*#4636#*#* . Otherwise call Tmobile.

CM11, random data blackout

Hoping this might ring a bell with anyone who has fiddled around with the GN and CM11.
The CM11 update notification won me over and I pushed CM11 (11-20140308 snap - toro) a few weeks ago.
Interestingly enough I saw a HUGE battery drain improvement. Possibly an oddity unless others have noticed this too.
Anyway, the big issue when using CM11 is random data blackouts. The phone can be on 3G, 4G, or Wifi and it will act like there is no data access. eBay app and Chrome give the 'no connection' type error with other things like email just not updating.
The fix so far is to reboot the phone. As soon as it comes back up the data portion works perfectly. Not the most time effective solution especially if trying to get important data on the go.
I know Google has marked this phone as past it's prime in terms of support, but with CM still supporting builds for this device I'm hoping something may sound familiar and somebody could give some words of wisdom for this problem. With the Nexus 6 device slotted to be released in the summer/fall timeframe I'm holding out on replacing the GN.
Ideas anyone?
change other kernel/boot.img
Sent from my Galaxy Nexus using XDA Premium 4 mobile app
well yes but I was also interested if anyone else may have been experiencing this.
if this is the same issue I've seen in some ROM threads then yes you aren't alone.
instead of doing a reboot, have you tried toggling airplane mode on then off? if that works, you'll spend way less time vs waiting for boot up
glad to know I wasn't alone on this one!
The 'no network found' issue just came up a minute ago. Probably had tried the airplane mode before but in a hurry I defaulted to restart.
The quick switch between AP mode and back did bring the connection back, although with the phone starting up fairly quickly the different between doing AP mode or restarting seems to be differently by only a second or two.
If this has been seen with some ROMs, what have people turned to as an alternative?

[Q] Data Connetion

Hello all!
I am having constant data issues all day where I go to use an app that needs it, it says that no data connection can be found or something. I turn the radio off, turn it back on and then it works. It's a good work-around but it does get very annoying. I've tried multiple 4.4.2 roms but no avail. I tried a different kernel but I couldn't even use the phone. Any ideas?
Same for me; I'm rooted now but it happened before root and after the JB ota updates. Annoying but otherwise I love this phone
I think this has been a known issue since ICS (I could be wrong though).
If anyone knows a fix that would be cool (I have GSM google play gnex)
My issues started late last night, lost data connection and it didn't come back. On my way home, it connected then lost again at home. Went to Verizon today and they couldn't figure it out, said possibly the radio is taking a crap.
On my way to work, it connects then gone. I tried flashing the radio, pulled battery, booted without sim, formatted cache and delvic. I have tried everything and think it's the end of the line for it
I've been rooted since the day I got it and had the issue once a while back but it straightened out and has been great since.
Certain CyanogenMod ROMs have trouble with the Network Modes sticking. Which carrier are you using? For my carrier, I had to have the correct APNs set to get 4G and MMS working. It might be that this is the problem in most cases, especially when the phone switches between 4G and 3G in spotty areas.

WiFi Issues

I am having a problem with the wifi in my house and my Verizon Note 4. Some apps load very slow such as YouTube, Inbox/Gmail, Instagram, and Google play music for example won't play music at all. I also sometimes don't get hangouts notifications on time. Fairly often I have to open the actual conversation thread for the messages to show up. The weird thing is other apps seem to work flawlessly; Falcon Pro, Reddit Now, Pandora and Google Plus all work with no issues at all.
It gets even more frustrating....
My nexus 7 (2013) and my girlfriends HTC One (M8) work fine connected to the same wifi network.
The issues on my Note 4 all go away when connected to the wifi at my girlfriends house or when on 4G at home.
This leads me to believe the Note 4 just doesn't like my wifi here at home. I feel like I have tried EVERYTHING... Forgotten the wifi connection, made sure all the advanced wifi settings are correct, reset my router, I have even factory reset my phone but nothing has changed.
If anyone has any ideas please help. It will be greatly appreciated!!!
koonrat45 said:
I am having a problem with the wifi in my house and my Verizon Note 4. Some apps load very slow such as YouTube, Inbox/Gmail, Instagram, and Google play music for example won't play music at all. I also sometimes don't get hangouts notifications on time. Fairly often I have to open the actual conversation thread for the messages to show up. The weird thing is other apps seem to work flawlessly; Falcon Pro, Reddit Now, Pandora and Google Plus all work with no issues at all.
It gets even more frustrating....
My nexus 7 (2013) and my girlfriends HTC One (M8) work fine connected to the same wifi network.
The issues on my Note 4 all go away when connected to the wifi at my girlfriends house or when on 4G at home.
This leads me to believe the Note 4 just doesn't like my wifi here at home. I feel like I have tried EVERYTHING... Forgotten the wifi connection, made sure all the advanced wifi settings are correct, reset my router, I have even factory reset my phone but nothing has changed.
If anyone has any ideas please help. It will be greatly appreciated!!!
Click to expand...
Click to collapse
I also have some wifi issues. I can maintain connection with the wifi, however, the connection 'degrades' after the a couple of seconds to minutes and after the phone goes to sleep. I tried the following:
1. Airplane mode on and off
2. forgetting wifi and resigning in
3. rebooting
4. factory reset
5. router firmware update (Verizon fios Actiontec m1424wr).
No success... I've connected to other wifi sources (at verizon store, public restaurants, and mobile hotspots) and it would maintain a reliable connection like usual.
I'm getting a replacement Note 4 from Verizon. If that doesn't fix it I don't know what will...
koonrat45 said:
I am having a problem with the wifi in my house and my Verizon Note 4. Some apps load very slow such as YouTube, Inbox/Gmail, Instagram, and Google play music for example won't play music at all. I also sometimes don't get hangouts notifications on time. Fairly often I have to open the actual conversation thread for the messages to show up. The weird thing is other apps seem to work flawlessly; Falcon Pro, Reddit Now, Pandora and Google Plus all work with no issues at all.
It gets even more frustrating....
My nexus 7 (2013) and my girlfriends HTC One (M8) work fine connected to the same wifi network.
The issues on my Note 4 all go away when connected to the wifi at my girlfriends house or when on 4G at home.
This leads me to believe the Note 4 just doesn't like my wifi here at home. I feel like I have tried EVERYTHING... Forgotten the wifi connection, made sure all the advanced wifi settings are correct, reset my router, I have even factory reset my phone but nothing has changed.
If anyone has any ideas please help. It will be greatly appreciated!!!
Click to expand...
Click to collapse
This probably won't solve your WiFi problem, but maybe while you are at home you can use the "download booster" function? If you have unlimited data, of course, because it will use your 4G if I'm not mistaken(?) s:
After trying numerous things I finally received my replacement Note 4. Turned it on and connected... no wifi issues at all. This meant that it was not an issue with my router and instead isolated to the actual phone itself.
Very happy that this worked, though unfortunately it isnt the quickest fix. I suggest turning it in for a replacement if all else fails

[Q] Mobile DATA keeps turning on Automatically

Every since Verizon pushed the Lollipop update to my N4, my "Mobile Data" turns back on all by itself after it has been disabled. It even turns back on when I am connected to wifi.
Has anyone else experienced this and if so can you please explain how I may fix this.
Thanks in advance.
Not exactly that but I have noticed that now I'm always on 3g when I'm usually on 4G all day long same area this is crazy
Mine is also randomly turning on Mobile Data too after the Lollipop update. I have a small data allotment with VZW, this could send me into overages.
I seen on one thread, searching through your downloaded apps to find out which ones have "change network connectivity" in the permissions. I happen to have 6 of them. Some you can disable, but it removes the updates, other you cant disable without removing it.
Another recommendation was hitting settings from the pull down menu, wifi, advanced, then uncheck the "smart network switch". Mine wasn't checked to begin with, so I'm out of ideas til I start removing apps one by one...
The data has been turning on by itself during sleep time on my Note 4. It caused the phone to use 500mb of data in one nite. My data is always off, wifi is only on when using the phone otherwise it's off too. I called Verizon and they have no clue. This is my 2nd new Note 4 for myself & my wife, nothing but problems. Think we are going to switch to anything other than a Samsung phone.
Well, I've systematically removed all 6 apps one at a time. The Youtube and Facebook apps, I was only able to disable them instead of removing them completely. In the end, the phone still turns on Mobile Data by itself. This must be something internal with Lollipop. I have a small data allowance and I'm afraid its going to go over simply because it wont stay OFF even with WiFi available!!
I would call customer service and have them ship you out a replacement. This is our 3rd phone and hopefully it will work as it should. Good luck
Outcast,
I've had my Note4 since it was released in November. It didn't have this problem with 4.4 Kitkat. It's something new with Lollipop and I doubt a new phone would solve this problem, could be wrong.
How involved is it to go back to Kitkat?
I'm not chancing voiding my warranty. They replaced my phones by them and not by request. Our phones get hot and get a warning then shuts down, apps close constantly and the phones consistently reboot on their own. Then the data turning on by itself. The other problems I don't think are software based but hardware failures. The data can very well be software related.
wifiwizard said:
Every since Verizon pushed the Lollipop update to my N4, my "Mobile Data" turns back on all by itself after it has been disabled. It even turns back on when I am connected to wifi.
Has anyone else experienced this and if so can you please explain how I may fix this.
Thanks in advance.
Click to expand...
Click to collapse
I have the same problem and i used up so much of my data when i am at home where the wifi connects automatically on everything else. On kit kat this never happened and i am attempting a downgrade so you might want to try that.
I was having the same problem with mine. I also live on the edge of 4g area, so it was constantly swapping between 3g and 4g. In addition to using some data it was killing my battery swapping between 3g and 4g. Using almost 10% per hour when not being used. I disabled most of the verizon stuff, support and protection, Verizon navigator, caller name id, message+, and verizon location. I turned off facebook location reporting in the app settings, and disabled google location. I did all these a couple at a time and would reboot to see if it fixed the problem and after all those were done i rebooted and wiped the cache and the prblem was gone. I turned google location back on so far and its still working the way it is supposed to. It shows a greyed out 3g symbol and my battery life is much better. My phone sat off the charger all night and only dropped 4% and in 5 hours of moderate use its down to 77% left. Wish i knew exactly which app was causing the problem to help you out better but hopefully you can try those apps and settings and get the same results.
Well it worked for about 3 days, but this morning data and wifi were both running again.
Data usage Samsung Galaxy Note 4
Been having the same problem even when I disconnect data ten or fifteen minutes later data is back on. And I've noticed even if I am connected to Wi-Fi data trumps it and I end up using a ton of DATA when I've been connected to Wi-Fi all day, getting seriously upset cause I never used this much data before.
I have same problem with my Note3 running Lollipop. Have tried every suggestion I can find to turn off data, but it is still runs, unless I am on wifi. Data is set to off, 4g symbol in notification bar is greyed out, but data is still on. I have found forums all over the Web with other people with this problem, but no solution yet. My phone is unlocked but not rooted.

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