Database Users

I spontaneously lose all reception - switching flight mode on/off fixes this

This happens many many times per day. many times per hour even. my Vibrant keeps losing reception spontaneously. however the following always fixes it and gives me full reception again: switching flight mode on and then off.
my carrier is Wind Mobile in Canada. they're new and are known to have call quality issues. I'm wondering is the problem simply my carrier experiencing over-capacity or is there something wrong with my phone?

I was having an issue similar to this on T-Mobile in Florida. I would still have data but would lose text and voice. I asked about it in the TW chat room and Stumpy suggested a Odin back to JFD and check the Clear EFS Phone box, this seems to have fixed my problem as I have not had the problem again since doing this. Perhaps you could try that and see if it helps. I flashed via Odin to JFD and checked the Clear EFS Phone box, then used Kies to upgrade to KA6. So far that problem has not occurred again.,

Which rom are you guys using? This happens to me a lot too. I mean I can pinpoint when it happens too. It only seems to happen when I have the phone in 3G only, but if I enable 2G and 3G swapping then it's fine. The radio seems to have a problem re-establishing a 3G signal which means that everyday on the way to work and the way home when I pass Anaheim I need to reboot. Annoying.
I'm using Bionix-V currently.

Zylograth said:
I was having an issue similar to this on T-Mobile in Florida. I would still have data but would lose text and voice. I asked about it in the TW chat room and Stumpy suggested a Odin back to JFD and check the Clear EFS Phone box, this seems to have fixed my problem as I have not had the problem again since doing this. Perhaps you could try that and see if it helps. I flashed via Odin to JFD and checked the Clear EFS Phone box, then used Kies to upgrade to KA6. So far that problem has not occurred again.,
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Currently, my phone has been updated from JI6 to KA6 (Froyo) using Kies Mini, then rooted using SuperOneClick, then flashed to KA7 Voodoo Kernal using Odin.
Should I take any steps before flashing back to JFD? or do I simply begin by following the instructions here.
EDIT: got the upgrade/flash steps wrong

happens to me too. have to reconnect just to have data.
Sent from my SGH-T959 using XDA App

LXXIII said:
Currently, my phone has been rooted using SuperOneClick, followed by an upgrade from JI6 to KA6 (Froyo) using Kies Mini, followed by a KA7 Voodoo Kernal flash using Odin.
Should I take any steps before flashing back to JFD? or do I simply begin by following the instructions here.
Click to expand...
Click to collapse
Just don't forget to disable Voodoo first. Make a file called disable-lagfix in the /voodoo/ folder of your internal sd card. Then reboot and your filesystem will be converted back to the scrap samsung uses.
Sent from my SGH-T959 using XDA App

This happens to me only when near a particular cell tower. I'll be right next to the tower and its been like this for the past two years, regardless of phone. I guess their network switch or whatever they use in those things is flaky.
The tower next to my house has not once yet had a connection problem.

UPDATE: got a new SIM card. everything is perfect.

i am having same problem, i tried new modem and new rom but phone still keep switching to flight mode and cause me to lose all signal. i guess I will get new sim card as well. thank you!

Getting a new sim card sometimes solves the issue, but other times, trying different modems is helpful. Ive been on KB5, KA7, JL4, and currently on KB1.
KA7 had consitent signal, but text messages took a long time to send through.
JL4 barely gave me signal. and KB5 was laggy. Well see how KB1 works.

What rom are you running? This used to happen all the time when I used D9

3g disconnects randomly GB .588

I am running .588 and I restored my data after coming from the original gb (.573) leak. I loose my 3g connection at least once a day. Sometime when I toggle the airplane mode it works and I connect back to 3g, but i that does not work I just reboot the phone. Anyone else having this issue? We need feedback to see if its a hardware or software issue in gb. The reason I cannot confirm if it is s/w or h/w issue I received a replacement phone when the .588 came out. I cannot compare both builds with same device. I am going to revert to .573 to see if it continues. I will post back with outcome.
Thanks in advance
Javiggan69

I have had this issue also. The toggling of airplane mode usually works for me too. Although yesterday it didn't and I had to reboot the phone.
Sent from my DROIDX using XDA App

jgraham4598 said:
I have had this issue also. The toggling of airplane mode usually works for me too. Although yesterday it didn't and I had to reboot the phone.
Sent from my DROIDX using XDA App
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The airplane mode does not work for me. Someone recommended to use an app called signal refresh. My main concern is if its a s/w of h/w.
Javiggan69

I have this problem, as well. I used the Monster SBF to get to .340, installed GB, and restored only user apps with Titatium Backup. Airplane mode works for me sometimes. Every now and then my phone will go into airplane mode and lock up, forcing me to do a battery pull...

I was on the old gb leak and restored data in clockwork after moving to the new gb. I haven't had the problem yet today. (Knock on wood)
Sent from my DROIDX using XDA App

Same
I'm seeing the 3G drop as well. Of course i only notice it since i'm tethering my wifi xoom to the droid (method irrelevant). Airplane mode works for me.

Mine drops out and stays out all the damn time. Sometimes airplane toggling is enough, sometimes I have to re-boot the phone and then toggle airplane mode and other times just turning WiFi off works well enough. It happens on my Wife's D2 constantly as well. We've missed plenty of calls (google voice pops up letting me know I have messages from missed calls even though the phone didn't ring and we have big problems texting throughout the day).
We're both going back to Liberty right now cuz this is BS. Hopefully this will get fleshed out for the final OTA and I can see why Verizon hasn't approved either leak yet. And even more hopefully it's not the new radio, and if it is hopefully SBF-ing back to 340 will fix it. If it doesn't, do any of the older SBF's work with the 340/588 bootloaders and also contain older radio firmware?

Javiggan69 said:
I am running .588 and I restored my data after coming from the original gb (.573) leak. I loose my 3g connection at least once a day. Sometime when I toggle the airplane mode it works and I connect back to 3g, but i that does not work I just reboot the phone. Anyone else having this issue? We need feedback to see if its a hardware or software issue in gb. The reason I cannot confirm if it is s/w or h/w issue I received a replacement phone when the .588 came out. I cannot compare both builds with same device. I am going to revert to .573 to see if it continues. I will post back with outcome.
Thanks in advance
Javiggan69
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Click to collapse
Update:
re-flashed GB. went two days with no signal problems, but this morning I lost my 3g connection. I have a feeling that it has to do with the hand-off between the wifi and 3g connection. I have tried to duplicate the issue but I cannot duplicate it. Also one thing I notice is when my 3g is not working and only shows the 4 grey bars I cannot make outgoing calls but calls do come in. Weird....
Javiggan69

I have been running into the same issue on both of the leaked versions.
Sucks ballz

Brenardo said:
I have been running into the same issue on both of the leaked versions.
Sucks ballz
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Click to collapse
I have been searching and reading and I have notice a couple of people are having the same issue. Have you tried to call your phone when the 3g is down?
Javiggan69

It's one of the issues. Not fixable now.

rocko73 said:
It's one of the issues. Not fixable now.
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Its a known bug? I have looked everywhere to see if people were having the same issue and couldn't find anything.
Javiggan

I am getting this also on the leaked GB :/
Took me TWO reboots to get 3G back!

Yep, it's all over. Despite what some may claim, the leaked GB(claimed OTA) is not without bugs.

rocko73 said:
Yep, it's all over. Despite what some may claim, the leaked GB(claimed OTA) is not without bugs.
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That blows. I have also notice that my wife's phone does the same thing, its a Droid 2.
Thanks
Javiggan69

has anyone noticed when this happens that your 3g icon and the signal bars go from blue to a white/grayish color? i have to reboot mine eveytime and then it works perfectly fine for another few days.....

Mine do that, but they turn blue one I starting using data

[Q] Unable to make a call and several FC's?

I;m sorry if this has been discussed before but I can't seem to find an answer for it. I have an Epic and it works great except for minor problems usually resolved by looking through the forums. Although my dad has the exact same phone and I put whatever Rom I am currently using on his phone so that he can have a fantastic phone. He has had Frozen 1.1, 1.2 and Randomrom 2.2. They have all been istalled with Journaling on. The rom will work fine but then out of nowhere he will have FC's and will not be able to make phone calls but can still receive them. Any idea what is going on? We have the same phone, modem and rom but he seems to have problems. The only difference I can figure out is that he lives in an area that has NO signal for any carrier and so his phone is constantly switching back and forth from Sprint and roaming which of course drains his battery like crazy. Could that cause the phone to wig out on him no matter which software he is running. Thanks for any help provided.

Do you have an airave? If not Odin back to stock to see if it works then root and flash again.
Sent from my SPH-D700 using XDA App

They do not use an airwave and I have done several odin's and reflashed and still the same problem. I've tried to see if he is doing something before it happens to slueth it out but he it seems to happen at random times. It use to be just tons of FC's but figured it was due to haing journaling off so I fixed that but now he has less FC's sometimes but now with the unable to mae outgoing calls problem. I'm just frustrated because I try to help my family with their smartphones and they have nothing but problems with them but me, the one who actually plays on his phone too much, never has any seriuos problems.

It may just be the No signal area. If there is no signal it can't dial out. If there is no signal for any carrier then you can't even try Roam Control.

[Q] Loosing Data Service

This is my 3rd Sprint S4 over the past few months. All of the devices are loosing the 3g icon but will show bars. Voice and text works fine, data and 4g does not, i have noticed it usually happens when i leave a WiFi area and it has trouble switching back over to cell data. I can reboot the phone and about 80% of the times it will return to normal. I have used odin to reload to factory. I had my phone rooted only and recently install the Triforce rom to see if it was a software or Kernel issue. Same thing is happening on that rom as well. It doesnt matter where i am so i dont beleive its a tower issue. Any idea?

This happens to me as well. Just Sprint being crappy. Try turning airplane mode on and off, same effect as a reboot but faster.

I tried the airplane mode toggle but didnt seem to fix it. If i use even the "Hot reboot" option in triforce rom that doesnt fix it either.

Assuming this this is the same issue I always experience, there is no fix. It's a network thing. Is there 4G in your area?
What happens to me is my phone will be on 3G, then start receiving 4G, but it doesn't recognize that the data service is now different, so nothing works for 15+ minutes or until I toggle airplane mode on/off.
I take it you've tried just turning WiFi off?

Haha, yea, welcome to Sprint. Enjoy losing data when it's least convenient (such as when you need to use navigation or missed your exit and need to be rerouted). Oh well, the price we pay for unlimited data, right?

I have noticed the same thing since I activated my LTE radio. LTE is expanding in my area so I constantly go in and out of 3G and LTE service. Sometimes when this happens data just ****ing stops working until I enter airplane mode and then come back out of it (a reset works as well). For some reason (or it is just a coincidence) The problem has amplified since installing 4.3. Has anyone else noticed an increase in this problem since upgrading? This is absolutely a Sprint problem? Do we know that people have this same issue with other Sprint phones?

I have the same problem. From wifi to f data takes a little bit of time for it to switch over especially since the data toggle is gone with the 4.3 update. Unlimited plan is water downed from my experience compared to tmoblie. But tmoblie service was horrible.
Sent from my SPH-L720 using xda app-developers app

emerald2382 said:
I have the same problem. From wifi to f data takes a little bit of time for it to switch over especially since the data toggle is gone with the 4.3 update. Unlimited plan is water downed from my experience compared to tmoblie. But tmoblie service was horrible.
Sent from my SPH-L720 using xda app-developers app
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Well Sprint's speed has always been an issue for most of us. That is no surprise. I at least expect to to work AT ALL which apparently it is incapable of doing recently.

JamieP87 said:
This is my 3rd Sprint S4 over the past few months. All of the devices are loosing the 3g icon but will show bars. Voice and text works fine, data and 4g does not, i have noticed it usually happens when i leave a WiFi area and it has trouble switching back over to cell data. I can reboot the phone and about 80% of the times it will return to normal. I have used odin to reload to factory. I had my phone rooted only and recently install the Triforce rom to see if it was a software or Kernel issue. Same thing is happening on that rom as well. It doesnt matter where i am so i dont beleive its a tower issue. Any idea?
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Click to collapse
If wifi is on 3g/4g is not there,, turn off wifi and you should see icon,, if you see bars it's most likely working :sly:
Edit just re read your post, I have the same issues sometimes and as posted above toggling on and off typical works for me,, good luck
Also is your network set to
CDMA/LTE/EVDO? Just throwing out ideas
Sent from my SPH-L720 using Tapatalk

I get this issue all the time & I have to do a battery pull to get my phone working again. Anyone flash a new modem which fixes this? The SGS4 is 10x worse than my HTC EVO 3D was with this issue.

pcfascist said:
I get this issue all the time & I have to do a battery pull to get my phone working again. Anyone flash a new modem which fixes this? The SGS4 is 10x worse than my HTC EVO 3D was with this issue.
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Click to collapse
Seems like a hardware problem based on your description. I am fully convinced that this whole flashing modems things is just a feel-good measure for people who have exhausted all other options. It was big in the Galaxy S2 days, but I have never seen any measurable difference between modems in any meaningful metric on that device. At least not one that could not be attributed to other factors such as signal quality and network load, and nothing consistent. A different modem isn't going to fix a hardware fault or magically improve Sprint's awful service.

Signal drops randomly (and frequently). Verizon.

I have a problem with my 6p where the signal just drops to nothing (Looking for service) and 3 or 4 seconds later it reconnects to a good LTE connection. The problem is not my connection as I live in a good area. I was rooted with xposed but for ****s and giggles I went back to complete stock and it is still happening.
I have reset the APN settings to no avail. Is this a thing that is known to this phone? Should I get a replacement? It started just recently it seems as I have had this phone since launch.
What sucks is, is that this phone is absolutely perfect (or was) and I dont want to get sent a phone with screen issues.
EDIT: I ended up getting an RMA and everything is hunky-dory.

holmgren said:
I have a problem with my 6p where the signal just drops to nothing (Looking for service) and 3 or 4 seconds later it reconnects to a good LTE connection. The problem is not my connection as I live in a good area. I was rooted with xposed but for ****s and giggles I went back to complete stock and it is still happening.
I have reset the APN settings to no avail. Is this a thing that is known to this phone? Should I get a replacement? It started just recently it seems as I have had this phone since launch.
What sucks is, is that this phone is absolutely perfect (or was) and I dont want to get sent a phone with screen issues.
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Click to collapse
What radio version are you on? You can flash a different version in fastboot and see if it helps.

murphyjasonc said:
What radio version are you on? You can flash a different version in fastboot and see if it helps.
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Click to collapse
Im on the newest one. Do I just extract it out of the 6.0 image file and just flash it over the top of the existing one?
I forgot to also mention that I tried getting a new SIM card from Verizon but that did not fix it either.

holmgren said:
Im on the newest one. Do I just extract it out of the 6.0 image file and just flash it over the top of the existing one?
I forgot to also mention that I tried getting a new SIM card from Verizon but that did not fix it either.
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Yeah. Extract it and flash it over the top in fastboot.

Did you ever find a remedy for this problem? I'm having the same issues on t-mobile so its definitely not network or a similar related issue. Did flashing the radio from the 6.0.0 rom fix the issue? I already tried several different 6.0.1 radios and a radio from 7.0 but to no avail. I'm about to try it and if it doesn't work I'm getting rid of this phone.

I'm going to assume you mean you'll be on LTE for the longest time then all of a sudden signal completely drops then comes back on, but without the LTE signal showing near the bars, so you'll have to airplane mode, then switch mobile data on and off, then do a restart. If this is the case. That has been a documented CM13 issue for the longest time. I had the same issue with the HTC M8...
Sent from my Nexus 6P using Tapatalk

jxcorex28 said:
I'm going to assume you mean you'll be on LTE for the longest time then all of a sudden signal completely drops then comes back on, but without the LTE signal showing near the bars, so you'll have to airplane mode, then switch mobile data on and off, then do a restart. If this is the case. That has been a documented CM13 issue for the longest time. I had the same issue with the HTC M8...
Sent from my Nexus 6P using Tapatalk
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I am on LTE but as the OP said the signal randomly drops completely for 4-5 seconds them comes back LTE and all. I don't have to reboot or anything. This doesn't have to do with cm13 though, I've tried flashing back to full stock and I still have the problem there too.
Sent from my Nexus 6P using XDA-Developers mobile app

Damn man...I have no idea - possibly radio like the guy above my post mentioned. Wish I were of better assistance.
Sent from my Nexus 6P using Tapatalk

I've managed to get a logcat at almost the exact time the signal drop happens, I had to put it in a Zip since the Txt document was too big for the thread. The drop happened in the last couple minutes. I'm hoping someone here with more experience than me can help me solve this issue. Thanks in advance.

Having the same issue on T-Mobile smh... it gets annoying at times!
Sent from my Nexus 6P using XDA-Developers mobile app

Same problem here. On Verizon

Anyone find a fix? I'm on the latest Android N Beta on Tmobile and still have the issue.