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4G Problem

I'm having a problem where my phone will not connect to 4G, it connected fine for about 2 weeks and then it stopped working. I have tried everything I can think of, restores, data wipes, new roms, the new radio, messing with modem settings, but I have had no luck, I'm starting to think that it is just my Thunderbolt and I will have to get a replacement I took this screenshot of the thing i think is werid, the phone recognizes the LTE network but GPRS service is disconnected. If anybody has any suggestions on something for me to try it would be greatly appreciated. Thanks

Flash the new radio that was made available today and see if that changes it. If not factory reset your phone and bring it in and say it stopped working.

schwab16 said:
I'm having a problem where my phone will not connect to 4G, it connected fine for about 2 weeks and then it stopped working. I have tried everything I can think of, restores, data wipes, new roms, the new radio, messing with modem settings, but I have had no luck, I'm starting to think that it is just my Thunderbolt and I will have to get a replacement I took this screenshot of the thing i think is werid, the phone recognizes the LTE network but GPRS service is disconnected. If anybody has any suggestions on something for me to try it would be greatly appreciated. Thanks
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I been have problems with 4G since Saturday here in San Diego. It has been working fine for 3 weeks up to this point. I have 3-4 bars of 4G, but there's no network connection. The connection does NOT bounce between 3G/1X. It is solid 4G, however on the 4G LTE icon at the top, only the white arrow lights up, never the down arrow. When I run the ping test in the diag screen you posted there, it fails.
I went down to the Verizon store near my house and they had two display Thunderbolts. One of them was having the same exact problem as mine. While I was there, I rebooted mine and it magically started working right.
Then about a hour ago, it stopped working again. Rebooted twice and nothing. Called Verizon tech support just to let them know there might be an issue since my phone and the display phone werent working right. They transferred me to a
"4G specialist" who had me shutdown the phone while he "rebuilt" my account in their system. Booted back up and it works again.. Dont know if something he did fixed it, or the third reboot fixed it.
BTW, my phone is factory stock. Have it set to LTE/CDMA Auto in th phone settings.

Sigh... it's doing it again this morning

Same here, stuck using 3G until further notice.
Sent from my HTC Thunderbolt

Ya this problem is making me mad, I'm going on a trip, and when I get back if I still have problems I will just unroot and get a replacement, I really hope someone knows a fix to this though and posts it
Sent from my ADR6400L using XDA Premium App

My 4g and 3g have been on the outs today here in ohio. Never had the issue before today. I'm assuming its a network issue and not an issue with my phone. And I have the new radio fyi.
Sent from my ADR6400L using XDA Premium App

schwab16 said:
I'm having a problem where my phone will not connect to 4G, it connected fine for about 2 weeks and then it stopped working. I have tried everything I can think of, restores, data wipes, new roms, the new radio, messing with modem settings, but I have had no luck, I'm starting to think that it is just my Thunderbolt and I will have to get a replacement I took this screenshot of the thing i think is werid, the phone recognizes the LTE network but GPRS service is disconnected. If anybody has any suggestions on something for me to try it would be greatly appreciated. Thanks
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Click to collapse
-89 dB is pretty weak. -89 to -93 is what mine is at most places in my house. The only way it will go from 3G to 4G is if I walk over to the bedroom window facing the nearest celltower and then it will go to about -78 and switch to 4G.
When facing the tower do not "cup" the phone because I have seen as much as 10dB loss from my hand being between the phone and the tower.

crazed_z06 said:
Sigh... it's doing it again this morning
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I have similar issues in San Diego as well. Fortunately I work from home, so I just enable WiFi for now.
Sent from my ADR6400L using XDA Premium App

crazed_z06 said:
Sigh... it's doing it again this morning
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I can say the same thing in Phoenix.... you have good 4g days and you have bad 4g days. Like yesterday... up then down then up then down then nothing for an hr.... then up and down... an awesome way to tank the battery.
I wish Big Red would make up their minds... and fix these issues.

Same here in scottsdale, shows the 4g icon but there is no data till it switches back to 3g. Maybe just a coincidence but mine started yesterday after upgrading to the new radio and bamf 1.5

Shinanigans250 said:
Same here in scottsdale, shows the 4g icon but there is no data till it switches back to 3g. Maybe just a coincidence but mine started yesterday after upgrading to the new radio and bamf 1.5
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Same for me in southern Scottsdale. Also started happen with new radio and bamf 1.5.
I'm going back to old radio and 1.4 for now...

crazed_z06 said:
I been have problems with 4G since Saturday here in San Diego. It has been working fine for 3 weeks up to this point. I have 3-4 bars of 4G, but there's no network connection. The connection does NOT bounce between 3G/1X. It is solid 4G, however on the 4G LTE icon at the top, only the white arrow lights up, never the down arrow. When I run the ping test in the diag screen you posted there, it fails.
BTW, my phone is factory stock. Have it set to LTE/CDMA Auto in th phone settings.
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I'm having the same exact problem you are having in NYC and now in Boston while I am on vacation. If I force the phone to 3G, everything works beautifully, but to get 4G working again, I have to power off and on the phone.
Now, while in Boston, this issue happens when I am in an area of no cell signal (say the parking garage of my hotel) and then walk into an area with cell signal. I'll wake my phone from standby and will not see the 4G symbol, and then the symbol appears, but no data, like what you described.
I wonder if it has to deal with how the phone connects to the towers. Maybe the new radio will fix it? I'm currently on stock since it's still runs pretty damn well.
Just to mention, my phone does not suffer from the cycling issue between 3G and 4G.

Switched to bamf remix 1.5 with the same updated radio and 4g works great now. Kinda like the remix better.. win win

Did you try taking out your batter and sim card... waiting a minute and then putting them back in? I had this problem once where I was stuck in 3G in a 4G area and this is what tech support had me do. I didn't think it would work, but it did!

Constant data drops

So I am currently running bamf 1.6.3 and I change kernals a lot, but one thing I can't seem to fix are the data drops. I live in raleigh, so no LTE, and am running the .7 cdma / .6 LTE radio combo. The data drops off a lot, more noticeable when changing towers. Even sitting at home with good signal it will just drop to 1x and is hard to get 3g back without a reboot. Anybody else see this? No reboot problems

So am I the only one with this issue??

Mine drops 3g and 4g for a second or two and then comes back. It has been happening a lot recently.

At one point in time I would have that happen, it was because of a local tower being screwed up. Maybe switch from eHRPD to the standard 3g network? or vice versa?

Had the same issue with 1.6.3 and went back to 1.6.1 and Im fine again. Ill wait for another version before updating again

Having this same problem but I'm on stock and it only happens while I'm on 3G....nothing but problem since I got this phone....did Verizon and HTC test this phone out? Gps problems,reboot problems,data problems,battery...I'm really sorry I left my carrier for this phone.

mbrown3460 said:
Having this same problem but I'm on stock and it only happens while I'm on 3G....nothing but problem since I got this phone....did Verizon and HTC test this phone out? Gps problems,reboot problems,data problems,battery...I'm really sorry I left my carrier for this phone.
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Click to collapse
the NEW 4g network is going to take some time to get running properly and because of that will have issues as will the phones. Not everything works flawlessly off the bat, give time to get everything settled and figured out and it will get perfected.
With all the radio/prl updates they have been doing I wouldnt be suprised if it is caused from that.

I was having the same problem. Disabling eHRPD has seemed to fix it. I still see strange signal drops, but I'm not seeing data drops at all.

It's not a fix, but rather than rebooting, just turn on airplane mode, wait for the airplane icon to appear, and then disable airplane mode. I have the same issue you describe, so I just keep the airplane mode toggle widget on my second home screen panel.
I'm getting very frustrated with the inconsistent data connection on this phone. I halfway considered trying to get VZW to let me swap it for the Droid X 2 when it releases next week.

I have similar problem. I live in Northern CA with 4G coverage. The problem will be like this:
- 4G works OK, data works
- Moments later, 4G icon shown upload activity (arrow up sign)
- Shortly afterwards, no data. Mail, Google Maps, etc. failed
Fix is to turn Airplane mode OR REBOOT the phone. I have tried switching radio mode (using LTE ON/OFF) but to no avail.
I understand 4G is new and so is the phone, but c'mon.. it has been sometime now and we are STILL paying for the service, even when the 4G network is down (few weeks ago) or when the phone loses data.

This happens to me on stock. Will be using 4G and then all data drops, then comes back, then drops, then comes back and repeats the cycle. Rebooting, airplane mode, nothing helps. Eventually it goes back to normal.

My phone went wacky yesterday. 1x and no data for four hours. Spent an hour on the phone with Verizon tech. We did everything possible and nothing. Then it just fixed itself. Had someone with a Droid X in the same room as me with great EV signal. Now the phone is perfect again. I dont get it . I have enabled REV A and now I put it back and that didnt matter.

zx12dak said:
My phone went wacky yesterday. 1x and no data for four hours. Spent an hour on the phone with Verizon tech. We did everything possible and nothing. Then it just fixed itself. Had someone with a Droid X in the same room as me with great EV signal. Now the phone is perfect again. I dont get it . I have enabled REV A and now I put it back and that didnt matter.
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Mine as well on 1.6.3 bamf remix. i had to keep going in airplane mode. it was stuck on no service or even the 4g icon (not blinking and no service)

We are Guenna pigs....

Since i have gone to the new leaked gingerbread radio not the latest froyo radio but the new gingerbread i dont have data drops
get it here http://www.multiupload.com/KQCRTNALV9

I too had continual problems with data yesterday (on BAMF 1.6.3) in San Diego. Kept switching from 4G/3G/1x. Today seems to be running smooth.

I'm gonna say thank god I'm not the only one, I don't live in a 4g area, yet there's many times my 3g will do the same arrow thing showing up and than everything fails. I'm running the new radio and perfect storm 1.4
, and drods kernel
Sent from my ADR6400L using XDA Premium App

[Q] Problems with the Full MR2 leak - 4G radio instability

Very odd problem with this new full MR2, probably radio related. When i upgraded it obviously did the full wipe so I know it's not a software interfering. It's pretty much a fresh reset since 1pm.
Anyways i keep losing connectivity to 4g. it flickers to 4g, then 3g, then 1x. Then back to 4g for a second, then it just loses connectivity to the internet totally but shows full bars. Now i'm back at 1x.
I am sitting smack in the middle of NYC where there is always full 4g & 3g bars. Anyone else experiencing this problem? I've done numerous reboots, put my phone in/out of airplane mode, etc but i can't hold a 4g signal for the life of me. Didn't have this problem in the AM before i upgraded. It's now flickering between no internet connectivity and 1x as i type this. I wonder if this is network related or the new firmware?

I was having that issue before the updates (the first one) when I was in NYC. I honestly think it may be the 4g network. the way I solved it was putting my phone on CDMA(auto) and it just held 3g.

I was having that same issue running The Perfect Storm. I downgraded the radio and went back to BAMF Remix and have had NO 4G issues. Good connection, great speed, and it never loses the 4G connection.

4g has been fine for me running the MR2 radio with flyweight ROM. I'm in Florida though, not NY...
Sent from my ADR6400L using XDA App

I am in NYC and had the same problem....
I even flashed the first Ginger radio and still had the same problem...
10 min ago I reloaded the MR2 radio and I am getting 4g now....
I am 99.999999% sure it was the VZ network!
EDIT::: just went back to 1x.....I am sure it is the VZ network...just have to wait ait out

Interesting...I thought I would try this update again this morning with a different ROM (Das BAMF 2.0 - 5) and have had no issues at all. 4G is constantly connected with no drops. I'm not sure if something happened with the initial install or if it was an issue with the ROM I was using it with. Anyway, all is good.

Try powering down..pull battery and LTE sim. Reinstall them and power up.
ridin the lightning

sorry to necro, but this is the first relevant thread i found in search
i am in a similar situation, before rooting (stock thunderbolt), i could exaggerate and say i didn't even know what the 3G icon looked like, constant 4GLTE uptime in washington, DC
i'm using INJ3CT3DTH3ORY (pardon me if i have stylized the name incorrectly) with an OVA MR2, and now i'm constantly 3G. i've tried every setting under "set preferred network." if i do LTE only, it'll show 4GLTE for maybe half a minute, and then fall into 1X. if i do CDMA + LTE/EvDo auto, it'll show 4GLTE for a similarly short amount of time, then fall into 3G. all the other settings deal with 3G only if i remember correctly, so i'm not even bothering to mention those.
thinking it might have been the radio, i tried flashing MR2.5 and MR.627, both giving me the same result.
any ideas?
edit: found this thread, seems to be related as well (showing some effort here) http://forum.xda-developers.com/showthread.php?t=1178285

I am not experiencing these problems with BAMF 1.86

[Q] mobile data not working, poor or no phone signal

Hey guys, I haven't done anything to my phone but all of the sudden, the data and phone signal basically quit working. I have a very hard time getting texts, phone calls etc to go though but it will eventually (usually takes a while or a few tries) and as far as data goes, I basically have no connectivity at all unless I'm on wifi. It says 3g or H every once in a while, but it's really slow and usually doesn't stay for long. I'm running CM9, and like I said before I didn't change anything that I'm aware of that would have caused this problem. It worked fine before, and it just stopped. Ideas? Thanks

iamtheculprit said:
Hey guys, I haven't done anything to my phone but all of the sudden, the data and phone signal basically quit working. I have a very hard time getting texts, phone calls etc to go though but it will eventually (usually takes a while or a few tries) and as far as data goes, I basically have no connectivity at all unless I'm on wifi. It says 3g or H every once in a while, but it's really slow and usually doesn't stay for long. I'm running CM9, and like I said before I didn't change anything that I'm aware of that would have caused this problem. It worked fine before, and it just stopped. Ideas? Thanks
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have you called your provider? maybe its on their end.

I'm having the same exact problem... it shows my 3g it shows all my bars but instead of the bars being colored or the 3g be in color is gray. Also I cannot get back conectivity until I restart the phone. Does anybody have an idea what this is?

Are you on AT&T? I was not having any problems until a certain point in time, and I didn't change or do anything to incite them. I'm not even getting calls anymore, I'll just get all my texts in a wave every few hours. My data is useless, it won't stream, or load web pages, and my phone is frequently saying "Emergency calls only" when I'm sitting at my freaking house (which normally has full 3g and cell signal and is very fast)

This just started occuring with my 9020a on AT&T the first week of March. I switched SIM cards twice, spent about an hour on the phone with ATT, and sent the device back to Samsung who rolled back the software to 2.3.4 and the Radio to UKE1.
I still have the issue. Samsung says its not them. ATT does nothing. It;s liek the phone just stopped working, started dropped calls, missing calls, and the internet connection sucks. I have an iphone for work through ATT as well and have no issues with signal.
ANy help is appreciated.

Hmm
Make sure you have the right, most up to date settings for APN, and flash original radios. if it still doesn't work, make sure you have the i9020A, which has the at&t 3g antenna, not i9020T which has the T-Mobile antenna, vice versa.

Have you tried other radios for your device (make sure you flash the appropriate ones for your model)? Any signal info under Phone Information when dialing *#*#4636#*#*?

ChemicalD said:
This just started occuring with my 9020a on AT&T the first week of March. I switched SIM cards twice, spent about an hour on the phone with ATT, and sent the device back to Samsung who rolled back the software to 2.3.4 and the Radio to UKE1.
I still have the issue. Samsung says its not them. ATT does nothing. It;s liek the phone just stopped working, started dropped calls, missing calls, and the internet connection sucks. I have an iphone for work through ATT as well and have no issues with signal.
ANy help is appreciated.
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Sounds like you're having the exact same problem I am having. I switched sim cards, flashed different roms, etc and nothing. (although to be fair, after the new sim, things work better, but still not well) I'm about ready to pop my sim back in my craptivate and just go with that... or buy an iphone off of craigslist.

Billchen0014 said:
Make sure you have the right, most up to date settings for APN, and flash original radios. if it still doesn't work, make sure you have the i9020A, which has the at&t 3g antenna, not i9020T which has the T-Mobile antenna, vice versa.
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I am 100% sure I have the 9020a, but I don't know anything about APN and flashing radios. I have only ever flashed full roms before, so I wouldn't know where to look for the original radio.

Oogway13 said:
Have you tried other radios for your device (make sure you flash the appropriate ones for your model)? Any signal info under Phone Information when dialing *#*#4636#*#*?
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Click to collapse
I have not tried other radios. The signal info seems solid, sitting at my house, but the 3g is still horridly slow. It taked 15-30 seconds to load a webpage, even a pretty mundane one like google. Messages still come through in waves, and often won't send

About your APN, AT&T should provide you with the proper values to put in under Settings | Wireless & Network | More | Mobile Networks | Access Points Names.
If you are on ICS, they values should populate by themselves.
Can you try flashing other radios and see if you encounter the same problem:
http://forum.xda-developers.com/showthread.php?t=1116884
Make sure you backup your EFS folder (and all data for that matter).

I had similar problems, they were related to turning 3g on/off with a APN widget while the phone had little signal. As soon as started enabling and disabling 3g on the android options everything was back normal.

alexfiorani said:
I had similar problems, they were related to turning 3g on/off with a APN widget while the phone had little signal. As soon as started enabling and disabling 3g on the android options everything was back normal.
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the data works most of the time now it's just retardedly slow. I can't stream music even on low quality, nor can I watch youtube without leaving it for 5 minutes to buffer,pages take forever to load, and I was downloading a 6 meg app and it took 20 minutes to download whenI was leaving the phone alone and not moving. I got really sick of trying to fix it and finally gave it to geeksquad to send in to get replaced. sigh.

Keep having data issues on my N5

So I had this issue with 4.4.2,.3, and now .4 radios. Sometimes when I switch from WIFI to LTE or from No Signal to 5 bars of LTE, data does not reconnect and I either have to wait or reboot the phone. Its extremely annoying. I am on Stock ROM rooted with Franco Kernel and currently on 4.4.3 with 4.4.4 radio. Anyone know whats going on?

are you undervolting?

simms22 said:
are you undervolting?
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Nope, I was and went back to stock voltage but it didn't fix anything

Also, I do get 3-5 bars of LTE in status bar but when I try to accessing internet I get nothing, be it in Chrome or any another app

well, its a known issue on the n5. it doesnt affect me much, as i reconnect to lte very fast and immediately have data. but, every once in a while, itll show me that im connected, but data stops flowing. at that point i turn on airplane mode, let it disconnect, then reenable it. data always starts flowing immediately after that.

simms22 said:
well, its a known issue on the n5. it doesnt affect me much, as i reconnect to lte very fast and immediately have data. but, every once in a while, itll show me that im connected, but data stops flowing. at that point i turn on airplane mode, let it disconnect, then reenable it. data always starts flowing immediately after that.
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I see. Why wouldn't they fix it? We had 2 updates already and I actually got it even worse now

kolyan said:
I see. Why wouldn't they fix it? We had 2 updates already and I actually got it even worse now
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i dont know. maybe they are aware and are working on it. but really, for me personally, it really doesnt create an issue. i turn on and off my airplane mode once/twice every week or two.

simms22 said:
i dont know. maybe they are aware and are working on it. but really, for me personally, it really doesnt create an issue. i turn on and off my airplane mode once/twice every week or two.
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Click to collapse
For me lately its more like once a day issue

kolyan said:
For me lately its more like once a day issue
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in feb or march, there was a few week period that it happened 3-4 times a day. thankfully it didnt go on. because of that, i assumed it was a tmobile issue, with them constantly upgrading their network in my area. but now i just dont know(lol).

It could be a tower issue. I have also seen weird things where it tries to connect and when I look at the actual field test app it shows it is on say LTE but reports in Android as searching for signal. A quick test shows the APN may be at fault. I know it sounds weird but for me on Cricket if I delete the APN LTE goes away. I put it back and LTE magically appears.
Also when I had Sprint I noticed there was a weirdness in that you could have an APN for EHRPD EVDO as a bearer or LTE as a bearer but not both it seemed so it would flawlessly connect to LTE but not EHRPD or vice versa.
If you know the APN is right then it may be a tower issue. Some towers may not broadcast LTE near you but ones slightly further away do so the phone may not connect right away.
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