Greetings XDA members. I purchased my Galaxy S3 from AT&T back in July. Had no issues with data (HPSA+/4GLTE). Recently I rooted phone (no custom firmwares) for tethering purposes. Never tweaked with APN settings. Some reason my phone shows the 4G LTE symbol for connection but randomly when I go to access internet on any app I have no connection. I also dont receive any text messages (SMS or MMS). Only way around it is to send my phone into airplane mode then turn airplane mode off and I can surf fine and all my missed texts pop up all at once. I can be in exact same area and use data then randomly it stops functioning (repeat airplane mode procedure). I did research and some say it could be that sim card in the spring could have unaligned inside the phone. Tried that but to no avail. Anyone have any suggestions? Would downloading stock firmware/factory settings fix this issue? Below is details on my phone.
AT&T Samsung Galaxy S III (SGH-i747)
Android 4.0.4
Baseband I747UCLEM
Network APN: default AT&T PDA
I have unlimited data (used roughly 3.7gb) because I've tried the restorting to factory settings and google reinstalled all my apps couple times (forgot to use wifi instead of cell data). I figured maybe that was an issue that I used too much data and AT&T cuts me off. Im not sure if its the tethering app (only used once to test) did something to it. Phone worked fine for a couple weeks then randomly started cutting data out resulting in the airplane mode workaround.
Ok I've rambled enough. Final question: Is there a list that has AT&T Samsung Galaxy 3 SGH-i747 default APN settings so i can varify that mines weren't altered to cause this issue.
Thanks for reading and hopefully issue can be resolved. Thanks.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
I just wanted to echo your problem. I have an AT&T S3 I747 and don't recall there being any network issues until I rooted my phone. I have unrooted, gone back to stock, and then even went back to stock ICS from JB and the network issue still seems to be there. I was curious if you found any ideas or fixes, or if anyone else has a fix or solution. I am running rooted stock Jellybean.
Im using my GS3 unroot with jelly bean 4.1.1 and dont seem to have the issue anymore. I went completely stock and I called AT&T to reset my data. Told them the issue I had (didnt mention i previously rooted) and rep reset my APN settings for my phone. I had to turn phone off for a few minutes then turned back on and all seems to work now. It still goes out sometimes but not as often since going from ics to jelly bean. Hope this helps. Dont think ill be rooting again anytime soon. Think problem started after I tried that free tethering/hotspot app for rooted users. This is messed with APN settings and caused problems.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Root by itself won't cause any issues. You used another app, in this case the tethering, which used root and messed up normal data on your phone. You can safely root just be careful what you do after that. Read, read, read.
I've got an SPH-L720.
I just purchased two of these as an upgrade today. I have a great connection (even airave) and I am having network connectivity issues. When trying to send SMS it usually won't go through and the data rarely works even though it says it should. This goes for both new phones. I read the APN might need to be set back to default for some reason, I haven't done anything with these phone yet. I have tried factory resetting already.
Help?
Since they are new phones. I have noticed that they have a hard time connecting to.an airave. I've had my gs4 for 2 months now and still only connects to my airave about 15% of the time.
Sent from my SPH-L720 using Tapatalk 4
I thought of the possibility of the Airave being the issue. I'll go ahead and turn it off and see if that helps. One of the phones is now working /Okay/ and mine refuses to do any SMS or data.
I'm in Japan for a couple of weeks for work and signed up for the Japan pack that Sprint offers. I spent almost an entire week working with Sprint support ( ) trying to get data roaming working properly on the phone without much luck (voice and text worked great), but yesterday I lost all connectivity but wifi. Figuring I must have changed something I shouldn't have, I saved everything I could and did a hard reset on the phone.
It still won't connect to any networks. I've re-downloaded PRL and device configs over wifi in the settings but it doesn't even attempt to connect to any wireless networks, or see any for that matter.
I have 2 guesses here but I'd like some kind of confirmation here before I take any action.
1: Maybe my radio firmware is corrupted somehow? I'm not exactly sure how to check it but it just doesn't seem to be doing much of anything. In the SIM status page it says searching for network, but I have no way to know if that's really the case.
2: Since the phone has a Sprint SIM, does it has to be on an actual Sprint network to initialize the networks? (Not Softbank's network here in Japan?) I spent over an hour on Google Voice with them last night trying to get an answer/help but got absolutely nowhere.
The phone is currently all stock but I have no problem unlocking and installing recoveries/software/roms if need be. Any ideas what I can do here or am I just stuck without communication until I get home next week?
Usually the best route is to get a local prepaid sim while traveling but honestly I have no idea what sprint offers for roaming in Japan. Check your plan and see if there is an add on needed.
I'm not alone!
Also THIS IS STILL AN ISSUE!
It worked fine for me last time I came to Japan, about a year ago. This time, I only have voice and text, no data. Right now I'm backing everything up to do a factory reset.
Did you ever find a solution to this?
I'm not sure if you've already done your factory reset, but if you're on Sprint, don't do a reset. The phone can't reactivate itself off of Sprint towers. You have to be in the US when you do the reset. I was stuck with WiFi only for most of my time there because I reset mine.
I never found a solution other than dropping Sprint when I got back to the states. Switched to Verizon and never looked back, though I'm not sure what I'm going to do for my next trip with their ridiculous international rates.
I actually got it working last night.
Factory reset and restore over wifi
Update device config over wifi -> handles activation
Update PRL over wifi 3 times
Now it works
Oh, I'm glad it worked. Is yours on Sprint?
Yes, but I may have spoken too soon. It worked for a few hours and now isn't getting back on data. I think it may be SIM related, since I saw a weird SIM error pop up and rebooted my phone, which led to the data working the first time
They must have redone their activation system since I had my issue in July. At that time there was no way for the phone to reactivate without being on Sprint's system.
As far as the data, that's the same thing I had happen and they were never able to solve the problem. It would work for a little while then stop for no reason. If you find a solution I'd love to hear it though.
I'm wondering if I can flash a different radio or something
So, when I woke up this morning I noticed my cell signal strength icon was one I haven't seen before. I tried rebooting and toggling airplane mode. I also verified that my sim is working in another device. I attached a screen cap with the icon.
Noticed something similar with mine. I had to turn wifi off, restart to get LTE data (verizon) then turn wifi back on. If restarting with wifi on the LTE data doesn't register.
that didnt work for me
update: had to factory reset, looks like verizon doesnt like that essential ph1 wont take all their bloatware, etc. might have to return the phone if this keeps up
My data connection has also become very erratic - and I've lost voice+data (VoLTE connectivity) wholly yesterday. Worked fine with the activated SIM from my HTC 10 from the 31st to yesterday.. Now, not at all, I've not been able to restore it since.
Really don't want to return it, as I really like the phone, but this has nexus 5x issues written all over it for long term use...
Hoping essential can get a certification and an agreement with Verizon before my return window is over (or at all)..
Pretty disappointed in Verizon here.
Sent from my PH-1 using XDA Labs
Same here, another issue is that essential shipped my phone and within a day i had an email from essential saying that verizon certification is still in progress. verizon will probably not certify it with their system unless essential lets them install their monitoring crap all over the phone.
j1999t said:
Same here, another issue is that essential shipped my phone and within a day i had an email from essential saying that verizon certification is still in progress. verizon will probably not certify it with their system unless essential lets them install their monitoring crap all over the phone.
Click to expand...
Click to collapse
The Nexus 6P didn't have the bloat and worked fine.
My PH-1 works fine including Enhanced 4G LTE Mode.
What do you have selected for network type?
I have the first one selected because that's the only one that includes the various CDMA protocols, EVDO and LTE.
I see the same connectivity that I had with my Nexus 6P.
i have global selected, as it covers everything the phone can connect to. i had the first one selected but it wouldnt show the lte+, just regular lte. i also have Enhanced 4g lte mode on. it just happened to lose service earlier today. if it does it again, ill probably return it after a visit to vzw
tech_head said:
The Nexus 6P didn't have the bloat and worked fine.
My PH-1 works fine including Enhanced 4G LTE Mode.
What do you have selected for network type?
I have the first one selected because that's the only one that includes the various CDMA protocols, EVDO and LTE.
I see the same connectivity that I had with my Nexus 6P.
Click to expand...
Click to collapse
I have the same settings as you, I had functional "enhanced 4G LTE" for the first 4 days as well... That ended yesterday morning abruptly, and I'm not able to bring it back.. There's more happening here.. How long has your device been on the Verizon network? Only a hunch - in a few days you won't have "enhanced 4G LTE" either, even though it'll still be checked, and provisioned for it.
Sent from my PH-1 using XDA Labs
Cellular network is not available
After 7 days my phone won’t make calls I can only use data I’m on sprint and it was working fine until today I call sprint they had no answers at all I email essential no answer now I can only use WiFi calling while home and axx out at work
So, upon further digging I found a place to look at some more in-depth stuff relating to signal stuff. I did some fooling around and switched it from unknown to lte/cdma/umts auto (prl) and it seemed to work after a few moments of time. Though it seems have gone back to t he unknown state again but is working normally for me now, so maybe it was changing states and then a reboot?
How I got to this screen was by punching *#*#4636#*#* into the dialer, and went to phone info
I'm having a similar issue. I often lose my signal. I will have the full triangle/bars but no label of the signal(LTE+/LTE/3G/1x/etc....) and no cellular data at all.
The only way I can get it to return is to restart the device. Happens a few times a day, can't be 100% sure why, but it often appears to be when switching from WiFi -> Cellular only.
I have Verizon, I have had a Nexus 6 and then a Pixel XL for the past 3 years, never once had this issue.
I had constant disconnects and lost of service with my Tmo sim. Tried my Xfinity (VZW) sim and it was great until this morning. Complete lost of service. Airplaned mode on and off, connected to old school RTT 1x.... lol This phone's cellular just plain suck for a lot of us regardless of carrier. Not sure if we just have bad phones because apparently there are those who claim they have great service and connection.
I'm having this problem with Verizon. Seems like if I'm on wifi for a long period it only connects to 1x and putting in airplane mode and stuff won't get it to re-connect to to LTE. Only a reboot seems to fix the problem.
fade79 said:
I'm having this problem with Verizon. Seems like if I'm on wifi for a long period it only connects to 1x and putting in airplane mode and stuff won't get it to re-connect to to LTE. Only a reboot seems to fix the problem.
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Click to collapse
Necro post here but chiming in that I have the same problem with Verizon LTE. Happens when I'm moving long distances in car too. Suddenly just drops LTE and only a reboot will bring it back.
defTwitch said:
Necro post here but chiming in that I have the same problem with Verizon LTE. Happens when I'm moving long distances in car too. Suddenly just drops LTE and only a reboot will bring it back.
Click to expand...
Click to collapse
You might check out my post from the Oreo Beta thread... I was having some goofy signal issues early on which I've pretty much cleared up by doing what I mentioned here. Someone touched on it briefly earlier but only mentioned monkeying around with the settings, said nothing about picking up a new PRL.
I state this in that post too, but just in case: I offer this with no express intent of warranty, if you screw up your device, it's on you.
https://forum.xda-developers.com/es...-oreo-beta-program-live-t3705133/post74920423
I just changed it from global to LTE/WCDMA and I got LTE back almost immediately. Was weird and global had been working for me for awhile now so not sure what happened in the past few days...
wolfhelm said:
You might check out my post from the Oreo Beta thread... I was having some goofy signal issues early on which I've pretty much cleared up by doing what I mentioned here. Someone touched on it briefly earlier but only mentioned monkeying around with the settings, said nothing about picking up a new PRL.
I state this in that post too, but just in case: I offer this with no express intent of warranty, if you screw up your device, it's on you.
https://forum.xda-developers.com/es...-oreo-beta-program-live-t3705133/post74920423
Click to expand...
Click to collapse
I had, right after writing this, tried *#*#4636#*#*
I set it to global as instructed in another post. The next time I drive a distance in the car I'll have to see if I have the same issue that only a reboot would fix again.
Thanks
I had the same issue and I resolved it a little differently than the previous posters. I turned on adb debugging and logged into adb shell and user-disabled com.redbend.app. This stops the Sprint oma-dm service from running. After doing this I no longer have the issue of my device not reinitializing lte after sleep or 3g.
I have essential on vzw but my only issue is my device won't connect to 4G. If I change network to LTE I get full 4G service but I'm unable to make phone calls. Went into vzw store and they told me you didn't get the phone from us so we cant help you. Day 14 fml
On Xfinity mobile, I had similar issues. Great LTE but sometimes calls just don't work at all. I mess with various settings and it'll work for a bit then so again. Gave up and ported over to Sprint for the free unlimited year which is still probably not worth it. Should've kept with Xfinity Mobile. Lol
Hi every one,
As the title says I've been using an Unlocked i337 with Simple Mobile carrier for the better part of a year now with zero issues, and happy with my 4G data working fine for a very long time until today when I seen my phone was only showing Edge data with the "E" indicator. I have tried searching and troubleshooting it, and nothing comes up. I recently rooted but 4G data was working just fine even after root. I have checked APN settings and toggled off and on. I went into the test menu and GSM/LTE is selected. I don't have any option in the settings menu to turn 4G off or on. What seems to be the problem?
Also for the record I have called Simple Mobile customer service for help but they can barely understand me let alone help me but they did check my account to see if any thing got adjusted and they resent OTA signal to my phone and every thing checked out fine. They just kept telling me restart my phone about 10 times.
Model: i337
Android Version: 4.2.2
If I haven't included any other crucial details let me know. Thanks